Craftsman 113201892 User Manual TRIPLE RANGE ARC WELDER Manuals And Guides L0904586
CRAFTSMAN Welder Manual L0904586 CRAFTSMAN Welder Owner's Manual, CRAFTSMAN Welder installation guides
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Save this Manual For Future Reference S_ AJRS MODEL NO. 113.201892 Serial Number Model and serial number at the may be found rear of the cabinet. You should model record both and seriaI number in a safe place for future use. A C 230 AMP/DC TRIPLE RANGE ARC WELDER CAUTION: 140 AMP Read ® assembly SAFETY iNSTRUCTIONS • operating carefully = repair Sold by Part No. 61477 ,i SEARS, ROEBUCK AND COl, parts Chicago, i L 60684 U.S.A. P_nted _rl USA .... -:%. :. ': SAFETINST.UCT IONS:TO: : i Fail_re:i!t_:;:!f0i 0w these ::instructions may result in sedods personat!njury_ :. :::i;i::: : FIJME'S ND G A S ES :iMAY B El :D AN G E ROU S TO _O'U R :NEAETH::: ::: ,' :i:'i ::iN:_iIjR E:::EYE S :A:ND :BEl RN S KIN.: SH O : ::::i:::: cooling louvers in the welding cabinet. If these objects contact the internal parts of the welder they couid damage the welder or result in an electrically hazardous condition. 2. EYE AND wEL:B:tNG SPARKS cAN: CAOSE_:E:XP_OSfON O R: WORK ::- AND ELECTRODE TABLE Wear dry hole-free ctothing:,::gtoves and shoes to protect and insulate tfie bodY. b.-Fake special care to insuiate "yourself from ground using dry insulation {such as dry_ wood) ol adequate size when welding on meta_ floors:or gratings, and in positions (such as sitting 0r lying ) where parts or large areas of y0ur:body can be in contact with possible grounds. c: Turn sw_tch "OFF" and remove plug from power source before picking upor moving the wefdeL d: Maintain the:electrode holder work clamp, wetdin9 cable and welding machine in good, safe operating condition by practicing periodic inSpect.ion and preventative maintenance; ......... This 0se under .... electricaiiy hazardoi]S:c0nd t _ns due to water or perspiration Under these conditions automahc control equipment _s required in accordance with ANSI Z-491 "SAFETY IN WELDING AND CUTTING " f_ Connect the welder only to a source of electrical power meeting the requirements. including grounding, of the National Electrical Code (ANSI C1) and local codes. Improper!y wired extensfon cords can cause a potentially fatal shock hazard by electrically energ z ng the welder cabinet Use only a proper!y wired and adequately sized extension cord which has a grounded conductor (See 'Connecting the Welder to the Power Supply elsewhere in this manual for more information} f you recewe a shock from the welder cabinetl _mmediately disconnect the we_der from the [_ower supply and obtain help from a qualified electrician g Do not drop or insert objects through PROTECTION d. Protect other nearby personel with suitable non-flammable screening. e. Welding can produce fumes and gases which are dangerous to health. Keep your head out of the fumes. Use enough ventilation, exhaust at the arc. or both. to keep fumes and gases from your breathing zone and the general area. Take even greater care when welding on galvanized or cadmium plated steel and other metals which produce toxic fumes. Air-Supplied helmets may be necessary. " f. Protect yourself against a fall should you receive an electric shock, particularly when working above floor level. Keep floor around your operating position free of clutter. Never wrap the electrode cable around any part of your body. HOLDER CLAMP :WORK PIECE METAL 80 Volts exist between these paris when welder is 0n! BODY a. Use helmet filter, and cover plate complying with ANSI Z87.1 to protect your eyes and face from sparks and the rays of the arc when Welding or observing open arc welding. b_ Always where safety goggles with side shields complying with ANSI Z87.1 when in a welding area or when near a slag chipping operation c. Wear oil free flame resistant protechve garments, such as leather gloves, heavy long sleeved shirt cufflesstrousers and h pgh shoes See picture of appropriate dress=n "'Arc Weld _t YOurself" section of this manual MRE:": :: :: To pt0i_ectlyourself: and others fforn these and othei _ hazard:s; read and 0bServe all instructions included: in tfiis rnanl_at asW_i!as!:the f01ibwing specific safety precautionS:_ !: i :::::::!: ! 1: SHOCK ai: or live metal parts 0fi:the :electrode:holder to touch bare skin Or any ii:lara p::0(: wet i d6ve ring:of the body. The electri6dec0atiiig Should be €0nsidered as an electrlCat COndu(_toiL Do not:insert electrode in electrode holder with your:bare hand wear proper gloves on both hands:. ELECTRODE OPERATOR g Do not weld in locations close to chlorinated hydrocarbon vapors coming from degreasmg. cleaning, or spraying operations. The heat of the rays of the arc can react with solvent vapors to form phosgene, a highly toxic gas. and other irritating products. h. Unprotected spectators must keep clear of the welding area due to the harmful nature of ultra-violet and infra-red arc rays, welding sparks, and welding fumes and gases. 3. FIRE AND EXPLOSION PREVENTION a Remove flammable and explosive material at least 35 feet from the welding arc t,o prevent welding sparks or molten metal from starting a fire. Keep a type ABC fire extinguisher within easy reach. b: Welding on or near containers which hold or have held combustibles can cause an exDtos_on even when they have been cleaned. Do not weld on such containers until you have read "Recommended Safe Practices for Welding and Cutting Containers and Pping That Have Held Hazardous Substances" F4.1 available from the American Welding Society, 550 LeJeune Road Miami. FL 33135. c. Vent hollow castings or containers before heating, cutting, or welding. They may explode from expansion of trapped air or boiling liquids. d. When not welding, place the electrode holder where it is insulated from thework clamp work piece, or work table. Accidental grounding can cause overheating of the cables and welder, creating a fire hazard. the 2 e. Neverconnectthe workcableor clamptoany objectbut the work pieceor metalworktable_ Connectingto otherobjectssuchasbuilding ground can cause stray currents to flow, resultingin overheatingor fire. 4. PREVENTATIVE Z49_!);_and "Fire Prevention in Use of Cutting and Welding Processes" (ANSI/NFPA No. 51B) from the American National Standards Institute, t430 Broadway, New York, New York, 10018. Purchase copies of "OSHA Safety and Health Standard" 29 CFR 1910 from the U.S. Government Printing Office, Washington, D.C. 20402. MAINTENANCE 'a. Never apply power to the welder with any part of the "cabinet" removed. Position on-off switch in "off" position and disconnect welder from the power supply before doing maintenance work inside the machine. Removal of the welder cabinet should be done only by a qualified service technician. b. Before connecting the welder power cord to the receptacle, check the following: 1. Inspect the power cord and welding cables for cuts or burns and make sure blades and ground pin on the plug are straighL 2. Inspect "ON-OFF" switch Iever for cracks or broken parts. 3. inspect electrode holder jaw insulators for cracks or broken parts. c. Never weld anything on or to the welder cabinet, as a burn through may cause transformer failu re. d. If any part of your welder is malfunctioning or has been damaged or broken, such as switch, cables, helmet, electrode holder, cease operation immediately and disconnect welder from the power source and turn switch "OFF" until the particular part is properly repaired or replaced. 5. ADDITIONAL SAFETY SPECmFgCATIONS INPUT Volts AC ................................. Hertz (Cycles) ............................. Rated Input Amps .......................... Delay Action Type Circuit Breaker or Fuse Short Circuit Amps ........................ Power Cord Length ........................ OUTPUT AC Low Range Amps .................. AC High Range Amps .................. DC Range Amps ....................... Arc Voltage ................................ AC Open Circuit Volts (max) ............... DC Open Circuit Volts (max) ............... Kilo-Volt-Amps ............................ Kilo-Watts ................................ Power Factor % ............................ Duty Cycle % .......................... GENERAL E_ectrode Capacity .................. Low Hydrogen ....................... Stainless Steel ....................... Aluminum ........................... Electrode Cable Length .................... Work Cable Length ........................ Dimensions ...................... INFORMATION a. For additional safety information, purchase copies of "Practice for Occupational and Educational Eye and Face Protection" (ANS! Z87.I), "Safety in Welding and Cutting" (ANSI READ AND OBSERVE THE INSTRUCTIONS APPEARING ON THE WARNING INFORMATION FOUND ON THE CABINET, ELECTRODE HOLDER AND ON THE INSIDE OF THE WELDING HELMET, TURNING WELDER WARNING BE ANO SURE THAT I'HA_ ALL ON. CHECK ARE THE NO ELEC]ROOE HOLDER INSULATION PROTRUDING IS ,SCREW TO H_:ADS SiECURE 8' 8' t5 x 12 x 2t a_d eye p_D_e_b0n a,_ams_ _dun0u_ _y_ _0m ar_ we_dh1_erp!ale Impac_ _e_stantey_ p_9tect_o_!hll_ p_a_ ba_k-up p!atR o_ Separate _a!e_y _p_la_es_ should Tes_sIant plple$ I SHADEN0 LENS ARC WORK WELDING AREA _ CAN BE iNJURIOUS CONSULT OWNERS To get the most from your welder even if you're an accomplished handy reference, or in the event FULL ONE YEAR WARRANTY warranty gives you specific SEARS. legal ROEBUCK rights, AND u_'_- and _mmed_a_e_v @ TO OPERATOI_ AND PERSONS MANUAL BEFORE OPERATING we suggest you read the manual carefully -welder, and keep it available to serve as a that repair parts would be required. ON CRAFTSMAN ELECTRIC WELDER If this Craftsman Electric Welder fails to perform properly, due to a delecI in material or workmanship, within one year from the date of purchase, Sears will repair it free o{ charge. this warranly applies only while this product is in use in the United States WARRANTY SERVICE IS AVAILABLE BY SIMPLY RE[URNING THE WELDER TO THE NEAREST SEARS STORE OR SERVICE CENTER THROUGHOUT THE UNITED STATES. This t_0T _-r_lechon-- ;_pface_mme_a_I¥ _s_ect _ouen_v MADE f# _TALY WARNING! IN THE _ br_akPbi_ P_'t$_0 rsc_'alched pla_e_ E_ECTR,C SHOCKCANBEfATAl'BEfORE I THERE 1/!6_3/16 !/!6-1/8 1/!6-1/8 3/32-1/8 0rdy for!a_ Impact ..,_ 35-140 50-230 30-140 25 74 80 t2 7.2 60 20-100 CAUTIg_ U_ 'I I 230 60 50 50Amp 67 6' and you CO,. may Dept. 3 also have 698/731A. other Sears rights Tower. which vary from IL 60684 state to state. "_ -TABLE :i-....... ,,:. OF CONTENTS ::2 Operating: Coriti;o s: .,. Troube:Sh0oting:i:i.:::.: Warrantv _............... : ..... '::i_:::::. ,...:.......... ::.i i:::i !:::. 4 6 8 ......... REPAIR AND CHECKING PARTS :... ::.:i:i i, ..... 2-1 ..... 2-6 CONTENTS ELECTRODE DIAMETER GAUGES OUTLET ON-OFF WORK JACKS CABLE ;K DO OUTLET4 WELDING HELMET / / WORK CABLE WORK CLAM AND P WARNING: FOR YOUR OWN PLUG WELDER IN IF PARTS DAMAGED. SAFETY, DO NOT ARE MISSING OR Key_ . N0. PartName Qty ,,, SET-UP INSTRUCTIONS This Craftsman welder.is shipped complete in one carton: in :order:;_to facilitate packaging, certain itemslmust:i be assembled when received by the purchaSei;:2BemoVe afl items.from the carton and . ident fy item : as :;shOwn in::,:the! e:,x,ptOded::!iview _ iilUSt:ration: These :: "Loose i Parts" :sho:ul:d i:_!: be _-_: accounted for before discarding: any packag rig: .... material. ASSEMBLY TOOLS NEEDED 7/16-inch wrench Screwdriver (medium) ATTACHING ELECTRODE HOLDER TO ELECTRODE CABLE 1. Locate the slotted head, handle locking screw near the front of the insulating handle. Remove this screw. Z Slide the handleoff electrode holder and insert end of electrode cable assembly through the handle: The electrode cable is the one with insulation stripped from one end. 3. Prepare=the end of the cable by splitting the strands into two equal bundles. Bend the bundles into a forked shape and twist together to prevent fraying. = ._ 1 Welding HElmet:(Partially assembled) 1 2 Helmet band assembly (Not Assembled) .. .... ....... 1 3 Electrode cable assembly .............. . ::: ..... :.... 1 4 Work cable assembly , .................... .,.,:.., t 5 Loose Parts Bag -- Coetainingt;qefollowing items: ... 1 Electrode Holder ..... . .... : ...... :...:, 1 Work Clamp ........ .............. ..:..:........ . 1 Screw Hex Hd. 1/4-20x 3/4in..:;.....:,:,._,...:.. ! / NuL Hex. !14-20 ::,..... ....... .-..::,.,,i..... .... Washer: Flat 17164in............ :. .... ...:..,...., _ 1 L0ckwasher, 1t4 in......................... ! 4. Back out the slotted-head screwtocated near the end of the electrode holder until the cable end can be placed under the rectangular clamp plate. 5. Insert the end of the cable under the clamp plate so that the forked end of the cable passes on each side of the screw. 6. Tighten the slotted head screw very firmly. 7. Slide the handle back into place on electrode holder and position it until the hole in handle is directly over the handle locking screw hole. Install the handle locking screw and tighten. SCREW ATTACHING TO THE THE WORK CLAMP WORK CABLE 1. Attach the terminal on end of work cable to the work clamp, at the ho_e near the nose of the clamp with the 1/4-20 x 3/4-inch screw, 1/4-20 nut, 17/64-inch flat washer and 1/4-inch tockwasher furnished in the loose: parts bag. 2. Do not use either work clamp. CONNECTING of the holes WELDER in handle TO POWER 3. Tighten contact slipping ends of SUPPLY the screw firmly enough and prevent the cable on the clamp. GREEN CoP_nect $ingte (Inc. Extension in !:o hot phase ',vires system of a only, FUSES OR C{F{CUtT BnEAKERS amps at 20% duty cycle in accordance with Article 630 of the National Electrical Code (ANSI Ct) and may not be adequate for other loads. Consult a qualified electrician before using for other loads. , Connect 230-volt shown in figure. power lines 3. Install 50 ampere circuit breakers delay action type such as "Fusetat", Cords) Up to 30 feet .......... No. !0 AWG 30 to 50 feet ........... No. 8 AWG Over 50 feet ............ No. 6 AWG NOTE -- These conductor sizes are for a welder having a rated input not more buss ECEPTACLE Electrical connections between the welder and grounded 230-volt, single-phase, 60-cycfe a-c power source should be made by a qualified electrician. All wiring must comply with the National Electrical Code (ANSl/NFPA70) and local codes. 1. Install an individual (separate) line for the welder with delayed action_ type circuit breaker or fuses in the line. For best results, this circuit should be as short as possible. The size of the supply conductors wilt depend upon their length as shown in the table below. Conductor good from W{RE Con_ecl Io g_ound power panel. CAUTION: To avoid damage to unit, fire or electrical hazards, do not attempt to connect this welder to a regular household outlet. Make sure the power-line voltage and frequency agree with the ratings shown on the cabinet. Supply to insure terminal Copper Copper Copper use with than 60 4. 5 and ground as or fuses of the "Fustron" or Use Sears Cat. #20691 Power Receptacle available through most Sears Retail or Cata}og outlets or any certified 50 amp, 250 volt. 2 pole, 3 wire, grounding type receptacle. ii:!:i::i:_:i == v !::O JNTRO:L:S @ welder: is derived from is equipped with ranges two :AC ranges and our ::tt j P one suitable for electrodes The 50-230amp AC range requi_:es less line (input current) draw for any given amp setting and permits SELECTING DC RANGES Your new arc welder has a DC range which makes it possible for youto weld aluminum using al uminum welding rods. You will find this increasing_.y useful as aluminum is be ngused eXtensively today, mostly because o_ its light weight,: corrosion resistance, and its ability to conduct heat. The DC range is also preferred for verticat and overhead welding, for welding thin metals, for reducing pop-outs; with many difficult to use rods, and to reduce important. CONNECTING ELECTRODE AND WORK CABLES FORAC WELDING Insert the tapered plug on the: end of the electrode cable into theproper Outlet jack depending on range required, insert the tapered plug on the end of the:work cable into_the AC work jack. :To insure a good electrical connection always twist the: electrode plug _slightty: while inserting. To rem0ve the plug twist in theopposite directi on while remowng: NOTE:: If_you extend the welding:iilCables:beyond those already supplied, they:must be No: 4 AWG or larger to avoid an undue drop:in:weiding:currenL DO NOT EXTEND CABLES OVER 50 FEET. Connect the work c amp to the: piece to be welded, (to complete the etectdcai circuit) or to the weiding table itself provided it is metailic orwill conductl electricity! CONNECTING CABLES up to 3/!6 inch diameter. Either range may be used, depending on operator preferences when the electrode diameter permits. ELECTRODE AND WORK FOR DC WELDING Polarity: In DC welding it is possible to change the direction of electron flow. This is done by changing the manner in which the electrode cable and the workcable are plugged into the DC jacks. ForDC Reverse Polarity: The electrode cable is plugged into the positive DC jack and the work cable is plugged into the negative DC jack._ In this mode the electron flow wilt be from the wo_rk to the electrode. This mode may be used for ahJminum welding, weldi ng .on thi n sheet metal, cast iron a nd high carbon steel. This is also the best mode for overhead and vertical welding. WORK CABLE l 6 spatter where appearance is For DC Straight Polarity: The electrode cable is: plugged into the negative DC jack and the work cable is plugged into the positive DC jack. In this mode the electron flowwill be from the electrode to the work. This mode is used for hardsurfacing, mild steel welding, cutting and burning holes. For more polarity the table provided Welds Aluminum ELECTRODE C detailed information regarding the current to use with specific welding rods, refer to provided on the welder and to information with welding rods. @ Connect the work clamp to the piece to be welded, (to complete the electrical circuit) orto the welding table itself provided it is metallic or will conduct electricity. We feel that welding with your new Craftsman range arc welder is as simple as A.B.C. 140ou,.u, DC _/ORK CABLE o dual A. Determine what diameter electrode should be used by gauging the piece to be welded on the material thickness gauge. The fractional number directly beneath the bar chart dictates what the proper electrode diameter is for given thicknesses of metals, You will note that a specific diameter of electrodes can be used on varying thicknesses of material. This is accomplished by adjusting the heat selector, for more or tess amperage. B, Next verify the electrode diameter, by placing the bare portion of the electrode against the electrode diameter gauge located under the bar chart. Because electrodes may be small burrs electrode. Make sure as clean as possible are mass produced, there on the bare ends of the the bare end of the rod is for accurate sizing. f C. Finally, determine the type of electrode by the identification on the package or by the American Welding Society number stencilled on the coated portion of the electrode, bearing in mind the type of electrode you have chosen -E6013 or E7014 or aluminum and also its' diameter (as previously determined). / Locate the electrode size and type in the recommended amperage range table below the welding rod gauge, and read the recommended amperage setting, Where the electrode can be used on either AC or DC, both recommended settings are given, 7 : i/: ..:Now !oosen tlie heat selector knob and move the pointer urtti/_i_ecommehded Setting: appears_:: i n thep0i ::i _i:!: .:::i: ,:i i: : :' .nob: :: : :: i: i selected)::_ Connect.the Work Clam p to the w6rk Wear Turn:the • lower your:Welding: to:weld,:- . 'ON" position, He!meL, and you are ready .... up and the technique of each operator fsdifferent, you may find it necessary to increase or decrease the amperage setting; accordingly. CAUTION: Donot loosen and move amp selector while welding. The duty cycle scales: bracketing the amperage scales are provided for :your convenience and protection ofly0ur new welder. Duty cycle is the performance level of the welder based on a t0 TROUBLE ! SHOOTmNG WARNING: TROUBLE i Removal of the welder cabinet a qualified service technician. top for any reason TROUBLE CHART : ::: i Fan and welder do:i : not operate, or :-:: ....... i : Continually blow _ :i I :fuses: minute time span, For example welding for 6 minutes oul of 10 minutes is a 60% duty cycle. To avoid possible overheating of the welding transformer, which could shorten the fife of your welder, Do Not exceed the duty cycles indicated on the duty cycle scales. : PROBABLE Improperly _P r otected, 112. Blown fuse, SHOOTING CAUSE fused ! or Welding ::: currentlow or open or weak Low : Can't hold an arc. iti:,111 Haven " 2, Welding Cur:rent Setting too low. 3, Poor " , : i:! ! connections: .:_L_ _ by REMEDY or reset the circuit "On". voltage : check performed the local power company, 2. Check Current recommended the electrode being used. 3, Check electrode holder, work electrode cable connections. Using a D.C. welding rod on A,C, range. 2. Using rod, fuse, 3: Turn:switch line v01tage_ ! SUGGESTED 2, Replace breaker, i:i;;;OmOif:" " :switch t be done 1 Use 50 ampere fuses of the delayed achon type such as " Fuse tr o n" o r Fustat or 50 ampere 240 volt circuit breaker. .... : must low hydrogen 3. Improper polarity on D.C. range, SERVICE 1. Use AC or AC-DC by for and rods, 2. Use rod of 1/8-inch maximum diameter, or smaller on 30-140 amp A.C. range or use D.C. range with reverse polarity. 3, Check that cables are plugged into the correct jacks to give polarity per the recommended amp range table. TIPS FAN MOTOR No provision has been made for lubricating motor, as extra large oil reservoirs lubrication for the life of the motor, the fan provide : f A COMPREHENSIVE GUIDE FOR YOUR NEW CRAFTSMAN ARC WELDER AND WHAT iT WiLL DO CONTAINS: INFORMATION = VARIOUS = USEFUL ABOUT TYPES OF RODS ACCESSORIES ° TIPS ON CUTTING, AND BRAZING WELDING J Form No. SP574_5 14 •ii:i•I;•• •• TABLE OF CONTENTS Page YourWelderandWhat It Will Do ............. 1-3 Howthe CraftsmanContactRod SimplifiesWelding 1-3 WhatHappensWhenYou Weld? .............. 1-3 ReadBeforeWelding ...................... 14 LearnBy Doing............................ 1-5 PositionWelding ......................... 1-11 Cast-IronWelding ........................ 1-14 HardSurfacingWore CuttingEdges .......... 1-15 TheTwin CarbonArc Torch ............... 1-16 Cuttingand OtherMiscellaneousOperations .,. 1-17 Read this Manual carefully for additional SEARS,' ROEBUCK AND COMPANY AND SIMPSONS-SEARS LIMITED 1-2 welding information. YOUR WELDER and what it will do.., Your CRAFTSMAN Arc Welder is a sturdily constructed and thoroughly tested machine engineered to give many years of efficient trouble-free service. It is listed by Underwriters' Laboratories, incorporated, which means that it passesall requirements of safety, fire hazard and temperature rise limits asspecified in their Standard for Transfer-Type Arc-Welding Equipment. HOW THE CRAFTSMAN ELECTRODE SIMPLIFIES WELDING Craftsman restarting... Contact Electrode is self-starting-plus The electrode starts on contact. automatic Craftsman Contact Electrode is self-cleaning ... Under normal conditions the slag removes itself asthe weld cools. Spatter is almost non-existent. Craftsman Contact Electrode has an exceptionally good appearance .., With fine ripple, unusually clean, smooth appearance, and reduced slag inclusions, Craftsman Contact Electrode deposits more metal faster,,. the powdered iron in the flux goes into the weld. W' H AT H A P P E N S WHEN YOU Because WELD? Arc Welding is the process of fusing two or more pieces of metal together to form one piece. It is accomplished by heating adjacent metal surfaces to the melting point with an electric arc, then adding a sufficient amount of molten metal to provide reinforcement and fill any vacant space between the parts being ioined, as shown in the accompanying illustrations. The arc is created when an electric current, regulated by a welding transformer, flows across an air gap between an electrode and the work being we_ded. The intense heat generated by the arc is ic{eally suited for welding, as it can be directed to affect only the part of the metal to be welded. Uniform heat from the arc, is acquired by keeping its length the same for a given rod size and current setting. At the instant an arc is "struck", a portion of the base metal directly beneath it, is melted, resulting in a small poot of molten metal, some of which is forced out by the blast of the arc and deposited along the weld path. The depth of the crater thus formed, is the distance the weld wit[ extend into the base metal and is referred to as the penetration of the weld. | Seth edges of the metal are heated by the arc, until- more molten metal and flux is added from the rod, which 5 2 4 they meft and flew together forming one piece, instantly-- fills the crater and covers the top of the weld with slag. This process continues the entire length of the weld. Some of the electrode (which consists of a metal rod surrounded by a flux coating) is melted simultaneously with the base metal and is carried by the arc to the liquid pool. This added metal combines with t_e base metal to form the deposited weld. During this operation a part of the flux coating burns off and forms a gaseous smoke screen that completely envelops the arc, protecting the molten metal from harmful effects of oxygen and nitrogen in the surrounding atmosphere. The remainder of the flux coating that melts is carriec_ to the molten pool where it mixes with the metal to combine with various impurities. It then floats to the surfaces to form a coating of slag which covers the deposited weld metal, protecting it from the atmosphere and retarding its cooling. When operating a welder, certain precautions must be taken to prevent injuries to yourself and others. Knowing how to use the protective equipment to safeguard against them is the first step in learning to weld. :The effects Of heat and light given off by the arc, while electric We ding, may be corollated t0 that of the S_Jh;S r:_ys. Even greater precautions are necessary for electric arc welding. Before starting a weld, caution anyone in the immediate vicinity against looking at the arc, In case of accidental eYe injury, contact a physician immediately. Animals are also affected by the rays and should be kept at asafe distance. To protect the face and eyes a heat-resisting; fiber:glass helmet is used, The special fens, which allows the user to View the arc safely, is inserted into the framed opening of the helmet, The clear glass,which should be replaced from time to time, protects the expensive special lens from breakage and weld spatter. The helmet is held firmly in place on the head with an adjustable head band, thereby leaving both hands free. A close-fitting skull cap should be worn with the helmet. As the helmet is used only when actually welding, a tilting arrangement permits it to be swung up clear of the face. When the welding is resumed a slight nod of the head tips the helmet down over the face. To protect the eyes further while cleaning the weld, goggles should be worn by the welder and others working around him. To safeguard the hands against heat and weld spatter, gauntlet-type leather gloves should be worn. A leather jacket or apron will give better protection against the _hower of sparks than ordinary clothing. High top shoes (not oXfords) should be worn. If a great deal of welding tobe done, foundrymen's shoes are best. is Precautions must als0 be taken to protect property and equipment against fire. A large fire extinguisher should be wlthin easy reach. The welding area should have a concrete or cinder floor, kept dry and clear of inflammable rubbish. Sometimes, it is necessary to weld dose to €: fuel tank. If practical, remove the part to be welded. If not, drain the tank and completely fill Few tools, in addition machine, are needed the average shop. it with water. to those supplied with the welding and most of them can be found in Two sawhorses supporting a 1/4-inch steel plate makes an excellent welding table. A permanent bench, using the same steel plate, can be made of angle iron or pipe. A chipping hammer is used to clean slag off a weld and pliers will be useful for handling hot metal. A wire brush is used to clean the work before welding and remove small pieces of slag after chipping. Small pieces of mild-steel scrap iron, reasonobly free of rust and paint, should be used for practice welding. Angle iron, bar stock or plate steel are good examples. Do not use scrap cast iron, high carbon or hardened steel as these metals require special electrodes and welding techniques. These should be set aside for future practice after completing elementary practice lessons. LEARN BY E:)O NG OFWELD DIRECTION Experience has proven that short periods of practice at regular intervals are the best way to teach yourself how to weld. As learning to weld is simply a process of trial and error, all practice work should be done on scrap metal that can be discarded. Do not attempt to make repairs on valuable equipment until you have satisfied yourself that your practice welds are of good appearance and free of slag or gas inclusions. Remember, what you fail to learn while practicing, must be learned through a series of mistakes and rewelds later on. A comfortable body position is important when learning, as tensed muscles will result in fatigue and Jack of control. Sit on a low stool and grasp the electrode holder in one hand with the cable drawn across the }ap. Allow enough slack to move the holder freely and yet keep the weight and drag of a long length of cable from becoming tiring. The work connection circuit as the cable is as much and electrode Any method of bringing the tip of the rod in contact with the work, then quickly raising it until there is approximately a I/8qnch gap between the rod and the work, will start an arc. The easiest way for a beginner to strike an arc is to scratch the tip of the rod a short distance on the surface of the work, as you would a match, then lift it (qu;ckly) the required 1/8-inch (fig. !). Another method is to strike the work a hard blow with the tip of the rod and allow it to bounce u_ to form the arc gap. The important thing is to strike the arc quickly and not allow the rod to remain in contact Mth the work. a part of the welding holder. A poor work connection can render the best wetding equipment inefficient. When using a table with a steel top, fasten the lug of the work cable to it securely with a bolt or C-clamp, so that any piece of iron placed on the table top wilt be properly grounded, work cable directly first attempting to weld. Insert a small, mild-steel welding electrode in the electrode holder and connect the welding cables to produce the heat specified by the CONTROL panel. Connect the ground cable to the work and set the indicator in the current range recommended for the diameter of rod used. tf a steel table is not used, connect the to the work with a work clamp or belt. Select a fairly large piece of steel plate approximately 1/4-inch thick and clamp it to the table top to prevent it from tiffing, should the electrode stick or "freeze" when A common mis{ake often made by a beginner is to point the rod toward the work an.d, after lowering the helmet, feet slowly about until the tip of the rod touches the work. This always results in sticking or "freezing" of the rod which produces a direct short circuit, When this occurs the rod can be loosened by bending it from side to side while pulling on the holder (fig. 2}. If this fails, turn the welder off, The electrode must be released in a matter of seconds to avoid unnecessary heating the flux coating on the rod. of the welder or damage to , ,','I ,111t ,; ;' I!11 ,' ';lIill ,i4_tl r,,. Figure 1 To strike an arc, scratch the end nf the rnd en the plate and then quickly raise approximately 1/8-inch. F;gu_e 2 Should the rod stick or "freeze" bend it from side to side while pulling upward on the rod holder. _777///////////,, _///////////2V/////. 1-5 I i i Fi_re .3 1o lay a weldbeadonlytwo movementsare Used,downwardandin the directionthe weldis to be laid. 1 [[ _1 i i Figure 4 Watchthe wold puddleto keep the slag from flowing in frontof it, causinginciusionsandgas pockets, Ifldifficult:y is experienced after repeated.attempts t9 maintain an arc, check ithe work connection for proper contact with the work; If this does not help, increase the welding current. Also check the rod size, as larger rods requi re higher current settings. Practice Striking and maintaining an arc for a few seconds, then snap it out by rapidly pulling the rod away from the Workl Repeat this Operation until the arc can be started and the gap maintained as uniformly as possible. In a find the:arc iength can be controlled by the_::cra(_kiingor.:_:frying :,sound:which may be recognized by gradua!ly shi_tening the arc until it sputters irregularly aS though.lt wei:e going to: choke out' and stick-then slowly lengthening the arc by pulfing the rod away from the work unt;i it snaps out. Somewhere between these two extremes the steady crackling sound of a proper arc length will; be heard. To lay only two movements are used, a stead}(.downwa_d feeding of the rod to maintain the correct arc |ength;.and a islowtrave|: in the direction in which the weld: 3).iWatch the weld puddle and arc length_andim0_e theil.rod Steadi|y in a straight line as the back end 0f:ilffieCrate_ fi!ls:up (fig. 4). The Slight angle of the rod wiii keep the flux or slag {lowing over: th:e dep0slted weidmetal 'to: farina protective coating, if:the rod is moved too lsl0wly the stag will flow in front of the puddle ancl be trapp:ed :i'n the weld,: producihg' ini:lusions and gas pocketSi : .... " i.... Lay a bead. approximately fou_ incheslong. After allowing it to cool SligF_tly,remove the: Slag Coating; which Coversthe top of the weld; by:scraplng along each edge of the weld with a cotd:.cF_iset f0!owed by wii_ebrushing until:it is bright and dean_ Inspect the Surface Of the weld carefully before starting another. The surface of a good weld is rippled uniformly, which results from a steady rate of travel and uniform arc length. Figure 5 Figure Fill the crater, when starting a new rod, by striking the arc at A then moving to B and back to C position. 6 1"owiden the bead, work the rod from side to side slightly, with a stow, zigzagging crescent-shaped motion. After laying a number of beads, try "'working" the rod from side to side slightly (fig. 6). This movement should be slow and not wider than the diameter of the rod being used. Experiment with different current settings, rod sizes and rates of travel. Compare results with welds shown in the diagrams (fig. 9). Too low a current setting tends to deposit the bead on top of the plate with very little penetration. The arc sound will be an intermittent crackle with irregular sputtering. Too high a current setting (for the size of the rod being used) will provide sufficient penetration but the bead will be thin and undercut in places. The arc makes a hissing sound and the rod becomes red hot before it is half used. if travel istoo slow it" will pile up a wide, heavy bead with good penetration but witk overlap of the weld metaI on sides without fusion. A large area surrounding the weld is heated to o high temperature which produces distortion, even on a simple weld. If the rod is moved too fast the small bead will result with little more than melted base metal An extremel)_ ]0ng arc causes the rod to melt off in globules, with little Or no penetration, and a very irregular weld Surface. The arc produces a hissing sound. A good weld laid with correct current setting, speed and arc length?.willproduce a sUrface that is rippled uniformly, with the same width throughout its length, and wel] formed crater.. The cross-sectional view showsit to have good penetration and no undercut or overlap. i If the scrap plate used is small, it will become very hot after laying a :few beadS. This will alter welding conditions Which €ou'ld be;very Confusing to a beginner. Have several scrap pieces handy so each may be allowed to cool before laying a seCOnd:bead. IlU When starting with a new rod, chip slag from the crater and strike,the arc at the forward end aS shown ;at "'A" in figure 5. Then move the rod to "B" and back to "C," at about twice the normal rate of travel to give the rod and base metal time to heat up for proper fusion, 1.6 I Jl Figure7 Lay the weld beadsabout one ineh apart. Removethe slagandexamineeachwed before starting the nexL Figure 8 A pad of weld metal is built up by running a series of beads in layers at right angles to each ether. CURRENTTOO LOW Arc is difficult to maintain, Very fittte penetration. High bead. TRAVELTOO FAST Small bead undercut in some pisces. Rough top and little penetration. CURRENTTOO NIGH Wide thin bead, undercut. Crater pointed and long. Rod burns off very fasL Surface of weld rough, Rod melts off in globules, Arc makes hissing sound, ARC TOO LONG TRAVELTOO SLOW NORMALCONDITIONS Metal piles up, making a wide heavy bead, overlapped at sides in places. Uniform ripples on surface of weld. Arc makes steady crackling sound. Figure 9 /i, ,,,,, ,, Practice a good laying beads wetd can be approximately produced with one inch apart afl the different until rod ® ® sizes the welder will handJe (fig. 7). After becoming proficient in running o bead, build up a pad of weld metal. Clean each bead before laying the next and make sure they are fused together (fig. 8). Run the second layer at right angles to the first and the third at right angles to the second, etc., until a pad approximately 1/2-inch thick has been built up. This type of welding is used to build up round or fiat surfaces or reinforce parts that are rusted thin. Figure !0 ell_l, To avoid distortion when building up the end of a shaft, run the beads parallel to the axis and lay each successive bead on the opposite side as shown by the numbered steps in figure 10. Cover the entire shaft with weld metal for the desired length. If the place to be welded is not at the end of the shaft, weld around it and turn the shaft slowly to keep the weld puddle in the flat position _fig. 1t). Clean off the stag after each bead, then machine the shaft to proper size. 1-7 FLAT WELDING ,= SHEET METAL BACK-UP STRIP Figure 4 TACK Figure 3 6-1#CH R_KFORCEMENT Flat welding includes all types of joints in which the weld ishorizontal, and the electrode is fed clown as in the practice welds of previous pages. The five types of joints in figure 1 can be welded in the flat position. Figure 6 _ Figure Butt welds 0n light materlal should be practiced first on scrap stock. Use 16_gauge mild steel sheet metal (approximate]y 1/16-inch thick) and 5/64-inch rods with the wetder set at approximately 30 fo 50 amperes. Butt edges of metal together and tack;weld approximately every three inches (fig.::2). (Tack welds are small beads t/4 to 3i8-1nches in length.) Place bars of scrap iron under ends of the work to provide an air space above the table. Simply move the rod in a straight line directly above the edges to be joined. tf the Weld burns thro_ughin places, reduce the welding current or irlcrease the rate_of travel. Some difficulty may be experienced in starting the arc at these low current settings. However, once the arc is started, there will be sufficient heat to make a sourtd weld. After laying a bead, turn the work over and inspect the Underside which should als0 have a sinai] uniform bea;€i_:To prevent burning through where the edges are not butted tightly together, move the rod back and forth with short quick Strokes in the direction of the weld to bridge the gap and give the metaf in the crater a chance to solidify (figL 3). Figure 5 7 FIRSTP,ASS V-WELD Figure 9 REINFORCING _45_y SINGLE-BEVEL WELl) 4-PASSBUTTWELD Figure 10 rll Butt welds on sheet metal lighter than 18 gauge should not be attempted by the beginner without the use ofa back-up strip (fig. 4). This consists of a bar of copper clamped tightly against the underside of the seam to absorb the heat of the arc and prevent the weld from burning through. To assure complete penetration with butt welds on 8*gauge metal or heavier, a t/t6 to 3/32-inch gap should be atlowed between them (fig. 5). Insert a wedge or screwdriver between the plates when tack-weldlng to maintain the gap, then turn the piece over, so the tack welds are on the underside. Use enough current to melt edges of plates to a depth Of at least one-half their thickness. Clean off the slag and inspect it for smoothness, penetration and height of reinforcement. A good weld should have a reinforcement slightly more than flush with the_ surface (fig. 6). Turn the plate I-8 over and weld a simitar bead on the other side (fig. 7). A higher welding current can be used on this side as there is no danger of burning through and fusion with the first bead will be assured. Although butt welds can be made on steel plates up to 3/8-inch thick, with a 29_ampere machine using 1/4-inch rod, the same results can be obtained with smaller welders if eages of plates are beveled (fig. 8). Metal of almost any thickness can be welded in this manner by depositing a number of beads, one on _op of the other until the groove is completely filled. If the plate can be welded from both sides, always use a double bevel (fig, 9), If only one plate is beveled, the angle should be at 45 degrees (fig. 10). Run the first pass on beveled plates with a 5/32-inch rod and use as high a current as you can handle to obtain a small bead on the underside. If this is not done, insufficient penetration will result, as shown in figure 11. Be sure to clean each pass before laying on the next. All beads are laid by moving the rod in a straight line with no weaving or side-to-side movement. On the last or reinforcing pass, a weaving motion must be used to obtain a wide weld that wilt completely cover preceding beads. For the beginner, the side-to-side movement (with a slight hesitation at each end) wi!l produce a smooth top without undercut or overlap. UNDERCUT GAS PG_CKET TRAPPEO SLAG PENETRATION Figure 11 Select several practice welds of different thicknesses and cut them into 1-1/2-inch strips. Clamp each strip in a vise and bend it at the weld (fig. 12). If it breaks through the we_d, study it to find the cause of failure. figure 13 FILLET Corner welds are made on light sheet meta] by running a single bead along the top, after tack-welding at threeinch intervals to prevent warping (fig. 13). If numerous gaps are present, a back-up strip may be used. On heavier metal two passes may be necessary and, if the design permits, a smaller pass can be laid on the underside. Beveling may be used to advantage on the thicker metals. WELDS BREAKING THEWELD Figure 4 Figure Fillet welds are used to ioin two pieces of metal with sides or edges at right angles to each other. The size of such a weld is based on the leg length of the largest isoscelesright triangle that can be inscribed within the cross sectional area, as shown by the dotted-line triangle (fig. 1). The size of a fillet weld may also be measured with a square and ruler, subtracting 1/32-inch from aH dimensions under 3/16-inch and 1/16-inch from all over t/4_inch (fig. 2). For example, a 1/4-inch fillet weld should measure 5/16inch. This will offset any inaccuracy due to the slight radius at the toe of the weld and allow for concavity of the bead. When a filtet weTd is stressed to its maximum capacity, faiture will usually occur through the throat section (fig. 3). Therefore, the strength is determined by the throat dimension multiplied by the length of the we_d. Finished welds of 6 this type should always be at least four times their size in length; that is, a 1/4-inch fiffet weld shoufd never be less than one inch tong, The direction in which the load is applied to a weld greatly affects its strength, which can be dearly demonstrated by breaking the weld (fig. 4). A joint so loaded should atways be welded on both sides with fillets equal to the plate thickness (fig. 5). If this cannot be done, bevel the plate to assure complete penetration and position the work at a 45_degree angle if possible. For practice, tack-weld three pieces of scrap iron together to form a cross (fig. 6). Use a 5/32-inch rod with high current and hold it as indicated in the front and side views. Move the rod at a steady even pace along the seam without any side-to-side movement and deposit one inch of weld for each inch of rod meffed. The surface contour of a good weld 1-9 Figure 8 Figure Figure Figure 9 1! TO iNTERMITTENT WELDS Figure STAGGERED INTERMffTENT WELDS 13 Figure: 16 Figure LAP: WELDS LAPWEL|)S I7 WELD ON BOTH SIDES ATENDOFJOINT Figure 14 Figure 15 i ii iiiiiiii should be nearly flat with a slight radius at the sides or toes. Avoid excessive concave or convex surfaces of the fillet (fig. 7). Undercuts and cold-taps are caused by not holding the rod in the center of the seam (fig. 8): ;If the desired fillet weld cannot be made with a Single pass, severat passes ore usedto build it up to required size (fig, 9); Stag must be cleaned from each pass before depositing the next. Fillet welds over 1/2÷inch in size are rarely used because joints requiring more strength can be made more economically by beveling and groove-welding, followed by a small concave fitlet weld to provide a radius in the corner. .HoriZontal fillet welding is used when the side or edge of one member of the joint is in the vertical position particularly fay small single-pass welds where the work cannot be tilted. For practice, tack-weld two pieces of scrap together to form a tee-joint (fig. 10). Use a 5/32-inch rod held at angles indicated, and direct the arc into the corner of the joint. The arc tength should be somewhat shorter than for flat fillet welding. To assure penetration at the root, Use:the highest welding current that can be handled (fig. 11). Good penetration is of prime importance an_dappearance 1-10 i i Wi|l _:coi_ewith experience. If the arc is advanced too fast, o_:_eld:too close to:the Vertical plate, undercutting may tbsu]f (fig_ 12). Too Slow travel will cause overlapping and _iti:extre_nely close arc or low current will produce a bead witha Convex surface (fig. 13). To check the penetration and S0undnessof the bead, break some of the welds for inspection, as shown in figure 4. Whe_ making a lap weld, care should be taken not to melt too much of the upper corner on the top plate (fig. 14). Some melting will take place, but proper advance of the rod will cause the weld metal to build up and blend into the top surface. On sheet metal hold the 3/32-inch rod almost perpendicular and move the arc rapidly. Welds of this type should be wider than they are high, somewhat like a f|at bead (fig. 15). A slight discoloration on the underside of the lower sheet indicates good penetration. On heavy metal, a :3/8-inch fillet weld can be laid in one passwith a 1/4-inch rod using a 295-ampere machine. However, with Smaller machines, the same weld or larger can be made by building up with e number of passes (fig. 16). When welding 10rig narrow pieces, stagger the welds in short intermittent beads, first on one side then on the other side, to minimize distortion (fig. 17). POSITION WELDnNG ]n order to derive the greatest benefits from your welder, you should practice until you can make a welded ioint in almost any conceivable position. The abitlty to do this _sespecially useful when making repairs on machinery as the amount of welding in most cases is small and does not warrant disassembling the parts to weld them in the flat position. Welds of this type have been classified into three groups according to their location and are referred to as vertical, horizontal and overhead welds (fig. 1). Of the three positions, vertical we]dlng will be used the most and should be practiced first. Skill gained in this type of we|d will make horizontal and overhead welding easier. VERTICAL WELDING The two methods of welding in the vertical position are commonly known as "vertical-down" and "vertical-up" welding (fig. 2). In the former the bead is started at the top and wetded in a straight line downward, in the latter the bead is started at the bottom and welded up, usually with a weaving motion. The chief difficulty encountered with any posit_on weld is keeping the molten metal in the puddle from failing out. To prevent this the arc must be held as short as possible and the weld puddle kept fairly small so it wifl solidify rapidty. Vertical-down welding is the easiest to perform and is used on material up to 1/8-inch thick. Before attempting a vertical weld, run a few practice beads to get the "feel" of the arc. Tack-weld a piece of scrap iron to an old practice plate so it is positioned vertically (fig. 3). Use 1/8-inch rods for the first welds and a current of about 75 to 115 amperes. Experiment with various amperage settings until you are using the highest current you can handle, Hold the rod at right angles to the ptate laterally, with the tip pointed up c_t the angle shown in figure 3. Start the weld at the top of the plate and move the rod in a straight line downward. The correct rate of travel can be determined by gradually reducing the speed until molten metal in the puddle can no longer be kept in place. Then, increase the speed stightiy while watching the puddle, arc length and angle of the rod. A short arc provides better control of the moffen metal. Follow the same procedure with 3/32 and 5/32-inch rods. It witl be noted that the larger the rod the more difficult it is to control the puddle. For this reason smaller diameter rods are always used for position welding. Lap or tee-joints ore made by simply directing the arc into the corner of the ioint as in fiat welding and moving the rod down the seam at a steady pace. Butt welds may require more practice, as there is a tendency to burn through on tight gauge material, if this occurs, continue until the seam is completed and patch the hole by chipping the slag and wire brushing until dean. Then, with slightly lower current, strike an arc on the weld directly above the hole and quickly bring the rod down to _he lower rim of the hole to deposit a smafi amount of metal. Raise the rod for an instant to let the metal solidify and repeat until the hole is welded. Hold a long arc when raising, so there will be no metal deposited except when the rod is lowered. Any hesitation in the rate of travel will cause a "burn through." tf this happens repeatedly, lower the welding current. Leave a slightgap between pieces for butt welds on materlal over 3/32-inch thick, inspect the back side after welding for small bead aJong the seam, indicating complete penetration (fig. 4). Butt joints on material around 3/16-inch thick should be welded on both sides. Vertical-down welds may be made on heavier material by laying in a number of passes (fig. 5), however, this practice is not recommended as it takes longer than a heavier singlepass weld made by the vertical_up method. ¥ERTICAL- _OWNWELD VERTICAL-gOWN WELDING LECTRDOES; .Lgt_CTnO_ ._,J, Figure 3 Figure 4 VERTICAL.UP WELDING WELD Figure Figure ......... 6 Use 1/8 and 5/32-inch rods for all vertical-up welds and start by running practice beads from bottom to top of a 3/16 or I i4-inch plate, tack-welded in a vertical position. Hold the rod as shown in figure 6, noting that the angle of the rod is not as steep as for vertical-dawn welding, but tilted just stlghtly (approximately five degrees) so the tip ofthe electrode points upward. Sffike and hold a short arc Until a small amount 0f metal is deposited, then quickly raise the rod upward with a Wrist movement to increase the length of the arc at the top of the stroke (fig. 7). As soon as the metal deposited in the crater has solidified, bring the rod down :and deposit more metal. Keep repeating this whipping motion, while gradually moving the rod upward and toward the plate as the electrode burns off. The length of the Stroke will depend upon the amount of metal de_ posited and the welding current used. Keep the rod in constant motion :once it has left the crater. The purpose of a long arc is to prevent any metal from being deposited except when the rodi_ held at the Crater,;If globules of molten metal drop from the tlp of the rod when the arc is lengthened, either the current is too high or the rod has remained away from ..... the...... Crater t0o long. Care Should be taken not to break the:arc at:the :top Of the strokel Donot deposit too much metal at One time as this wilt Cause the weld to sag and result: in a high narrow bead undercut along the sides. Better penetration can be had by the vertical-up method_ This can be. demonstrated _by joining two pieces of 3/16-inch metal with abutt weld, using the whipping motion. Leave agap between the plates and use a 5/32-inch rod with a fairly high current, cletermined by experimenting. TEe whipping motion will melt the corners of the plate and form a pocket in which to deposit the weld metal Ifig. 8). weave (fig. 9). This will produce a "shelf" upon which additional metal is deposited intermitter_flyas the welding progresses. There should be a slight pause [n the weaving motion at the toes of the weld to avoid making a bead that is too convex. Materials 1/4-inch and thicker must be beveled on one or both sides,depending upon the joint. Practice making a wide bead using a side-to-side weaving motion with a very slight whipping action at each end to give the metal at each end a chance to solidify and avoid undercutting along the sides of the weld (fig. 10). This type of bead is used on welds that require more than one pass and is called the finish bead or "wash" pass. Hotd a short arc, making the bead approximately 3/4-inch wide and fairly light. Multiple verticai welds may be made as shown in the series of diagrams, figure 11. Burn the rod in deep so the crater extends through to the back side. After completing the weld, inspect the back side for the small bead, which indicates tration. Butt welds on heavier materials on both sides: 100_percent peneshould be welded On materials up to 1/4-inch thick, use the whipping motion on small single-pass fillet welds for lap and tee-ioints_ Larger single-pass fillet welds can be made by the whipping motion with a slight side-to-side weave added and combined with the up and down movement to make a triangular shaped 1-12 9 Figure 11 UNDERCUT Figure OVER-LAPFED _gure HORIZONTAL 13 14 BACK-UP STRIP Figure Figure Figure 16 I7 WELDING Horizontal welding refers to one type of butt weld between two plates in a vertical plane. For practice, set up a plate as for vertical welding and run straight beads across from left to right (fig. 12). Use the some current settings as for vertical-down welding and hold the rod as indicated with a short arc. Move the rod in a straight line and deposit a light bead. The rate of travel will depend upon the current used. Too slow a travel will cause the bead to sag (fig. 13). Practice with 3/32, 1/8 and 5/32-inch rods until a weft formed bead can be macle with each size rod (fig. 14). Sheet metal up to 1/16-inch OVERHEAD ]5 thick con be butt welded from one side. If the seam has numerous gaps, use a back-up strip, allowing a slight gap between edges of 1/8-inch thick metal and weld from both sides (fig. 15). All metal 3/16-inch thick and over should be beveled and welded with a number of passes (fig. 16). Thoroughly clean each bead before laying the next and use higher current than for single-pass welching. The appearance of a multiple-pass horizontal weld can be improved by vertical down beads laid closely together. Use a swift circular motion to the right; stowly downward while welding (fig. 17). WELDING Although overhead welding is generally considered difficult, do not become discouraged, as it is being done every day by people who have taught themselves. Once the art of maintaining a short arc has been mastered, the rest will be easy. Since there will be a shower of sparks, wear a leather jacket, tight fitting cap and ear plugs and keep the practice plate slightly higher than the top of your head when standing. To keep sparks out of your glove, grasp the electrode holder as indicated in figure 18 and hold the rod in a nearly vertical position with a slight tilt to the right. Drape the cable over your shoulder so its weight will not interfere with the use of the electrode. Use 1/8-inch rods and a current setting the same as for vertical welding, and move the rod in a straight line without any weaving or whippir_g motions. A reasonably fast rate of travel must be used_ to prevent the bead from sagging and undercutting along the edges. Vary the rate of travel and notice its effect on the size and appearance of the weld. When you feel you can run a satisfactory bead, try the side-to-side weaving motion and deposit a thin weld approximately 3/4-i:nch wide. The movement must be somewhat faster than for other positions to keep the bead from sagging. (This method of weaving is used only for the last pass on heavy welds where improved appearance is necessary,) The whipping motion is used where a gap exists between the plates as it provides better penetration with higher welding current. For practice work, set up two plates approximately 1/8-inch thick, allow|ng a gap between them. Burn in deep for good penetration with 1/8 and 5!32qnch rods, varying the plate size and gap distances. Figure 18 Figure 19 Fillet welds for tap or tee-joints are most common in the overhead position. Tack-weld two pieces of scrap iron together to form a tee-ioint, and clamp in the overhec_d position so one plate is held vertically (fig. 19). Hotd the rod at angles indicated and deposit a [ight bead from left to right without weaving or whipping movements. A slightly higher current than used for overhead butt welds will be necessary to get good penetration at the root of the weld. 1-13 METAL BENDS • eLrff _L_ $'IAilr tST _LD HER(. 2N_' W[tD B£_, ETC, Figure 20 F;gure Figure To simulate actual conditions tack-weld a piece with an irregular edge to another piece leaving numerous gaps along the joint. Use the whipping motion and deposit a fairly heavy bead, slowing down the rate of travel where the gaps are widest to build up a weld of uniform size throughout its length. If the gaps are rather wide, fill them first, clean off the slag and lay in a fillet weld the entire length of the joint (fig. 20_). When you can lay single-pass butts and fiffet welds you will be abie to make anoverhead weld of any size, as it is simply a matter of fusing a number of straight beads together, one on top the other (fig. 21). Weld appearance can be improved by grinding with a prOperly guarded abrasive wheel mounted or= the end of a flexible shah. EXPANSION AND _CONTRACTION CAST 24 21 IRON Previous experience in handling the arc, plus good judgment regarding expansion and contraction, witl enable you: to weld gray cast iron successfully in a short time. Two types of electrodes are used, namely: non-machinable for use in cases where the weld does not have to be machined, and machinable which deposits a file-soft weld that can be drilled or machined t01rclose tolerances. Nonmachinable rods are Used for mast repair jobs such as cracked motor blocks, water jackets, pump and gear housings, etc_ tf the weld must be made across a machined surface that need not be refinlsbed to a close tolerance, the face of the weld may be ground flush w_thon abrasive wheel. As cast iron is very brittle, care must be taken to control expansion and contraction, and thus avoid cracking Of the surrounding metal is free to move (not clamped or tacked) it cannot resist these forces and bends (fig. 22). The weld also contracts in width, as well as in length, tending to pull the plates together, resu)ting in locked.up stresses(fig. 23). This is not too serious when welding mitd steel up to l/2-_nch thick, as the ductility and elongation of the metal will permit it to deform slightly to compensate for these forces, and prevent cracking. On sheet metal and light structural members, long continuous welds may cause considerable bending and result in a badly distorted weldment. Fortunately most of this can be avoided by studying the effects of expansion and contraction, as related to the job before welding and working out a procedure to follow. For example: first assemble the iob with tack welds, and install temporary braces tack-welded to support parts that might bend. The braces canbe removed after the iob is completed. Lay the beads so the stresseswill counteract or n_utralize one another, by running a short pass first on one side then on the other, etc. Often the neutralizing weld is at the other end of the job. Do not concentrate too many welds in one ptace but space them to distribute the heat and stressesthroughout the entire structure. Use intermittent welds whenever possible, if continuous welds are necessary to make a water-tight compartment, use the back-step method as shown in figure 24, fusing each bead together atthe end. WELDING weld or the casting. Because of tow tensile strength and lack of ductility it cannot bend, stretch or distort itself to conform to the contraction of the weld metal In some cases it may be necessary to pre-heat the entire casting before welding. However, as most cast iron welding iobs can be done without pre-heating, this method will be considered first. The part must be free of rust, grease, paint or dirt; cteaned by wire brushing, grinding or washing with sotvent. The crack should be beveled for penetration. If the parts are broken apart compteteb!,they may be ground on an abrasive wheel to a single or double bevel, depending upon the thickness of parts and whether or not the joint can be welded from both sides. Do not bevel to a sharp edge along the entire crack. Instead, allow approximately 1/16-inch ofthefractured surface tolineupthetwo pieces. Tack-weld or clamp parts in position. If the crack has not separated the casting, a yea-groove can be chipped out with a diamond-point chisel. Chip an inch or so beyond the visible ends of the crack as it may extend under the surface. On crocked water jackets, where only a seal is required, the depth of the groove need only be one-hatf the thickness of the casting. Keep the casting as cool as possible and do not expect to complete a weld in cast iron as rapidly as in the same length in mild steel. Use a smaller rod and a slightly higher current than for the same thickness of steel. Lay a short bead, about an inch long, at one end of the crack and peen it immediately with a cross-peen hammer or blunt chise] to spread the weld metal and relieve locked-up stresses. Do not strike the edges of the casting. Place the second bead at the opposite end of the crack and the next in the center, etc (fig. 1). Allow enough time between welding to permit your bare hand to be held on it. Never use water or a blast of air to cool the casting. Although cracks may not show up immediately, the tacked-up stresses due to uneven cooling will cause the casting to fail after it is back in service. Wire HARD FACING WORN brush each bead before depositing the next. Then continue to fill the groove with short weld beads as before, working rapidly whe n depositing and peening the bead. Allow plenty of time for cooling. Examine the casting for cracks that may develop during cooling periods. If any of the beads crack, chip them out and re-weld. If cracking persists, preheat the entire casting slowly to a dull red heat with an oxyacety_ lene torch or blow-torch. When the preheated method is used, the welding can be continuous. After completing the weld, cover the casting with warm dry sand or slaked lime so it will coot slowly. Malleable treated welding iron is ordinary gray cast iron that to give it a tough ductile outer is the same as for cast iron. FIRST BEAD THIRD BtAD CUTTING has been heat skin. The method of SECOi_D BEAD EDGES GRIN1)OFF W'F._V_BEAgS Figure 2 HARD FAC_fNG CULTIVATOR SHOVEL F_gure SOFT BASEMETAL WEARSAWAY FASTER THAN HARD rACING 4 MtL_-STEEL WELDS STEEL PATCH Figure 5 CULTIVATOR SWEEP Figure 1 Excavating equipment, earth-cutting farm machinery or others such as plow shares, lister shares, cultivator shovels, sweeps, subsoilers, spike harrow teeth, tractor treads, excavating buckets, or any surface subject to abrasive action will last much longer and require less sharpening when their cutting edges are hard faced with hard surfacing electrodes. The arc welding process consists of depositing a layer of abrasion resisting weld metal on the worn cutting edges as indicated in red on the parts shown in figure 1. Prepare the part for welding by cleaning the surface to be welded by grinding it approximately 1-1/2 inches back from the edge (fig. 2). Position the part so weld metal can be deposited in the flat position. If the materia! is 1/4-inch thick or less, use a 1/8-inch rod and as low a current as possible that will still permit the metal to flow out smooth and fairly thin (t/t6 to I/8-1nch thick). Weave the rod from side-to-side in a crescent-shaped movement and deposit a bead about 3/4 to 1-inch wide, Several passes 0aid Side-by-side) may be necessary where the worn surfaces c_re quite wide. In some cases a small straight bead must be deposited along the edge to build it up (fig. 3). Make beads heaviest where the wear will be greatest, but avoid excessive build-up as the metal cannot be filed or machined. If shaping is required, heat the weld metal and forge it. Smoothing and s_harpening can be accomplished by grinding. For plow and lister shares, cultivator shovets and slmifar cutting points, deposit the weld metal on one side only which will result in a serf-sharpening edge (fig. 4). The softer base metal on the other side wil! wear away first and leave a knife-like edge of hard facing material. Parts that must wear uniformly on both sides should be hard faced on both sides. The condition of the worn part must atso be taken into consideration. If the part requires a number of passes to bring it up to the desired thickness, use mild-steel wetding rods first; then cover with deposited metal from hard surfacing rods. If the edge is entirely worn away, a steel patch (cut to fit) may be welded in ptace with mild-steel electrodes, then hard faced (fig. 5). To prevent distortion when hard facing small parts, peen the deposited weld metal before it cools. IE i. ¸¸. : RC ,- To pre|0are the torch for use, connect its two cables to the ground and electrode cables of the welding machine. Grounding of the work is not necessary as the operation of the arc flame is entirely independent. With the thumb knob or_the handle in the "off" posltion, insert two 3tS-inch carbon electrodes in the holders and damp in place at approximately one-half their length (fig. 2). Do not clamp them on or near the ends opposite from the arc as this will cause overheating of the carbons. When tightening the clamping screws, be careful not to apply too much pressure on the carbons, as they are very brittle and break easily. Use only enough pressure to hold them firmly in place, tf the tips of the carbons do not line up with each other, an adiustment may be made by turning the longest of the electrode holders sllghfly; too much turning will loosen it, and make it necessary to disassemble the torch to again tighten it properly. THUMB KNOB SCREWS EL,1ECTRODE TIPS CONNECTTO GROUND AND ]ELECTRODE CABL.£SOF A.C. W)E.LD[R Figure ! Work ordinarily done with a gas welding torch is possible with the twin-carbon arc torch connected to an A.C, welder. The carbon-arc flame is similar to the flame of a gas weld; ing torch in that it provides heat by radiation, rather than by direct arc between work and electrode. This flame heat greatly widens the scope of Work possible with the arc weldei" for brazing, soldering, wetding of non-ferrous metals and localized heating for bending; forging and hardening. The arc torch (fig.: 1)Consists of an insulated handle with two projecting carbon eiectr0de holders, one of which is adjustable to permit striking and breaking an arc at the carbon tips. A thumb knob on the handle performs the adjustment and operates a shut-off switch bui|t into the handle; There are nO valves or gauges that:, require fine adjustment as with an 0xyacetylene t0rch. The same proteCtiveequipment used for Ordinary arc welding is used: when Operating the carbon'.arc:torch; ........ A wide selection Of flame heats may be had by varying the current and size of the carbon electrodes. Although the actua| temperature of the arc remains :the Same for any current setting, the vo|ume of transferable heat increases with an increase in amperage. However; amperages in excess of thosegiven below will only Causeshort carbon llfe. 1/4-in. Carbons................ 5/16-in. carbonsL ........ 3/8-1n. carbonS. ........... - I ]1 ii i 30 tO 40 amperes ...40 to 65 amperes 65 to 90 amperes Do not make any turning adjustments with the sliding holder as this would spoil the contact tension in the switch. To strike the arc, turn on the welding machine and set it for approximately 70 amperes. Lower the welding helmet and hold the torch up to silhouette it against the light of a window. Slowly move the thumb knob forward until contact is made between the tips of the carbons, This will start the arc. Then immediately move the knob back to increase the gap between the carbons. The actua} distance can be determinect with a little practice. When the carbon s are too close the arc flame will have a sharp crackling noise. As the distance between the carbons is increased, the crackling will change to a soft purring sound which indicates the best arc flame. There are two heat zones and the small inner zone is by far the hottest, having an estimated temperature of 9000 degrees Fahrenheit (fig. 3). The shape of the flame greatly influences the way in which it must be used. Forexample: on beveled work the torch should be held parallel to the groove so the flame will reach the bottom (fig. 4). If held at right angles to the groove, the flame straddles the groove and the heat will not reach the bottom (fig. 5). Filler rods, as for gas welding, must be used on joints of this type. The soft, bushy flame is pressureless and has no tendency to blow the molten metal. This is a distinct advantage when welding thin sheet metal. Joints on light material should be i II i CORRECT i [. TORCH Figure , , 2 i ,i ii FLAME POSITION Figure INCORRECT 4 FLAME POSITION Figure 5 ,, I III! II1! III I I I ,lit,,,,,,,,, ,, ...... I ....... ii ill i i .......... bent and edges fused together by melting down the excess metal to form a bead (fig. 6). No filler rods are required. The carbon-arc torch is ideally suited for brazing and soldering small tubing. Cast and mat_eable iron can be brazed with excellent results. A bronze filler rod and common brazing flux are used. Rust, paint or grease must be cleaned from the area to be brazed. If it is a butt joint, such as a crack in a casting, grind or chip out a beveled groove as for arc welding. Apply the heat from the arc flame gradually by passing it over the metat surrounding the ioint, When the casting has become warm, concentrate the arc fiame at the ioint. The important thing to remember when brazing cast iron is never to heat the edges of the joint to the melting point. The temperature of the work shoufd not exceed the melting point of the filler rod. The carbons are held as close to the work as possible without causing the meta_ to bubble. Hold the filler rod in the left hand and heat the end of it slightly by passing it through the arc flame. Then dip the heated end in brazing flux. Raise the torch slightly and deposit some of the flux at the part of the joint being heated. When the surface of the heated metal takes on a shiny or wet appearance, the filler rod can be applied. Do not put the rod directly in _he flame, but hold it on the work and let the heat of the edge of the flame and the work melt the rod. Deposit only enough metal to fi!l the part of" the joint that has been being deposited, move coated with flux. As the metal is the torch along the joint slowly, applying and joint flux to the rod as required. Copper and copper-base alloys such as bronze and brass may also be brazed, but as their melting temperatures are so close to the melting point of the filler rod, the process in many cases becomes one of welding rather than brazing. A bronze filler rod and common brazing flux are used. Most non-ferrous metals can be welded by manipulating the torch and filler rod in the same manner as for brazing, with the exception that the edges of the ioint are heated to the melting point before depositing the filler metal. If the work is a copper alloy, use common brazing flux. If it is an iiii Figure Figure 6 7 aluminum alloy, use aluminum flux. The filler rod should be of the same analysis as the work. tf regular welding rod is not available, strips of the parent metal may be used. A back-up strip shoutd be used when weldlr_g thin material. Small diameter carbons and low amperage setting are used for soldering, The torch is held sothe work is just within the visible edge of the flame. Apply the soldering flux and play the flame over the work until it is just hot enough to melt the solder. If the joint is to be sweat-soldered, tin the surfaces to be ioined, then press them together and reheat, adding more solder at the edges of the ioint. One of the most practical uses of the arc torch is heating metal for bending, forging, etc. Set the torch for a wide, enveloping-type flame and apply the heat to the bottom of the work (fig. 7). Since a red heat is nat visible through the dark welding glass, the helmet must be raised periodically so the work can be inspected to avoid overheating. To pro_ tact the eyes from the rays of the arc, hold the torch to one side and above your head. The carbon-arc torch is not recommended for welding mild-steel. However, it may be used for brazing mild-steel if the metaf is too thin for regular metallic-arc welding. CUTTING and CUTTING WITH other miscellaneous operations THE ELECTRIC ARC Arc cuffing is simply the continuation of a "'burn through" such as you probably experienced when practicing with light sheet-metal welding. When this action is accelerated by using extremely high currents, it becomes an efficient method of cutting metals. Although the edges of the cut surfaces are not as smooth as when cut with a saw or oxyacetylene torch, there are many cases where such precision is not required, Ordinary mild-steel welding rods may be used. The current will vary with the type and thickness of the material, In general, high currents i_crease the speed of cutting but also increase the rod burn-off rate and width of the cut. START CUT HERE Figure .v,..-MOLTEN IA_AL STEEL HTAIN£R T 1.17 BOLT AND MOVeeOoUr ANO:--_ .... OOWN VERTICALLY : _: .._o '>- "" -_ f,_._ _:: : ,_ i: ":" _ _ ___,, Removing rusty bolts Or rivets isan easy iob with an electric arc welder. The arc is struck on the head or nut of the bolt and worked around in a slight circular movement until the Used to drive out the remaining part. The bolt or rivet can head is completely melted off. (fig. 4). A punch is then be removed by heating the head almost to the melting point, then quickly shearing it off with a cold chisel. Care must be taken not to cause the bolt to become welded to the metal. __:I,_°_- .... _ d" i | "_ _L- t / "_" \ START CUT HOLE HERE Figure RIVET CUTTING PIERCING Another useful application of the welding arc is piercing holes in metal. Coated metallic electrodes are best for 2 this purpose because of their small size and insulation afforded by the coating. The process is extremely fast and a surprisingly clean circular hole can be made. For practice, place a piece of scrap iron 1/4-inch thick (or less) on the table and altow it to proiect over the edge as for arc cutting. Use a 3/32-inch rod and the same current as for cutting. At the place where the hole is to be pierced, strike an arc and hold it until a molten puddle is formed. Then push the electrode down against the molten puddle and force it through the plate. ]t is possibleto hold the electrode against the melted plate because the metal core meffs off faster than the coating. The coating (not the rod) touches the molten metal (fig. 5), The gap maintained by the protruding coating prevents the metal core of the electrode from sticking or freezing to the plate. TO make a trial cut, place a bar of steel approximately 1/4-inch thick on the table so that one end projects over the edge. Use a 3/32-inch rod and a current setting of around 140 amperes. Hold the rod as shown in figure 1 and strike an arc on the top corner at the edge of the bar where the cutis to be made. Feed the rod into the molten puddle and keep the crater burning through as the rod is moved across the bar. To catch the molten metal, place a meta_ container on the floor directly under the cut. when cutting metal heavier than 1/4-inch, the arc is started atthe bottom €orner and worked Up and down vertically aslshown in figure 2, advancing: the bottom of the cut slightly ahead of the top Of the cut to permit molten metal to run out more easily_ Ira smooth edge is desired, the pieces carl be ground on an abrasive wheel Electrodes designed especially for cuttir_g mc_y also be used. If a larger diameter hole is desired, first pierce a hole as described. Then, holding a fairly long arc, melt the edges of the hole away by moving the rod around it (fig. 6). Holes of almost any diameter can be mode. To pierce a hole through material thicker than 1/4-inch, work from the Onderside. REMOVING:SEAMS In addition to cutting; the electric weldlng arc can be used for beveling the edges of material to be welded, gouging out cracked welds for rewelding or removing tack_welds. The surface of the metal being worked Upon should be approximately in the vertical position; or tipped slightiy toward t_e arc (fig. 3). Start atthe bottom Ofthe:seam to b_ gouged out and Work upward; The rate of speed Will depend Upon the depth of the groove and the am0untof metal removed. HEATING The carbon arc provides a convenient method for localized heating of all metals. Simply strike an arc on the part to be heated and "play'" it across the surface until the required temperatbre is reached. I II pll r UNTtL IT BU_ THRO_H,_ Figure I 1.18 I I I Figure 5 3 i Figure 6 NOTES 1-19 NOTES 1-20 q _ q ,,,, W#ELDING ..... ROD $PECIFmCATIONS _"................ _ A% /S E-6011 GENERAL Body • APPLICATIONS: and General Fender o Pipe Repairs MILD Farm e oStructura_ STEEL Equipment Tanks e Sheet o Maintenance .................. -_ _: _ -- "";"'";'"'"_ i-- AC-DC Metal • Car and Truck _ Jigs and Fixtures o • Cabinets Steel SIZES AND HEATS (AMPS) Diameter .... 1/16" 20-55 Flat ! I 3/3220.80 I !I8", 75130 I 5/32" 100-175 _ i I00-150 ! 3/16" t50-225 ' t i 1t4- 7132" 175.250 200-375 Vertical Overhead 20-55 20-65 75415 SPECl F ICATIONS Physical Properties "tensile Strength Yield Point of Deposited Metal: As ................................. ..................................... % Elongation in 2-inches ........................... Reduction in Area ................................ Stress Welded Relieved 70,000 to 75,000 psi 65,000 to 70,000 psi 60,000 to 65,000 psi 55,000 to G0o000 psi 23% to 25% 30% to 35% 50% to 55% 65% to 75% DESCRIPTION The AWS E-601 1 is an AC-DC (reverse polarity} electrode with a special coating that provides strong fluxing action for high quality welds, even in dirty, rust covered, galvanized or plated steels. An extremely stabte, spray type penetrating arc, is produced that is easy to start and restart after interruption. It is a versati;e electrode. It adapts to a wide variety of iobs due to the wide range of amperage settings at which top quality Features: WELDING results Deeper are obtained. Penetration PROCEDURE; Fast Freeze Weld with Puddle - Greater AC or DC (reverse Arc Stability. polarityt. Strike the arc by brushing rod tip lightly at the point where weld is tO be made. After the arc is established and weld material is deposited, concentrate on holding a short arc that _sjust tong enough to keep the electrode from touching the molten metal. In the fiat position, use a slight oscillating motion as you advance, In vertical position, on sheet steel start at the top of the seam and weld down. This provides a more rapid speed of travel, lower penetration, arid minimum warpacje. When welding overhead use a straight stringer bead or a circular motion. Keep the molten pool as small as possible, Use smatl electrodes overhead, none larger than 5/32 diameter. i_ 2-1 SPECiFiCATiONS W E[01NGiRO:D AWS E-60131:Ni0LD STEi=L multi-purpose GENERAL APPLICATIONS: Pipe o Tanks Work - Boders Farm • Structural AC-DC al! position Equipment Steel e o Car and Truck Maintenance • Sheet Metalo Re_)a_rs o General Repair SIZES AND HEATS (AMPS) Diameter, ..... 5/64- 3t32" 1/8"" l 5/32"' i ' 3/1 6" 114"" ....... Flat 20+55 20-75 75-130 100-175 150-225 Vertical 20-55 20-65 75+115 100-150 150-200 Overhead 20-55 20-65 75+115 100+150 200.375 SPECI FICATIONS Physecal pfopert+es of Tensile Siren gth Yield Point Deposited Metal: St reSS R et !eyed As Welded ................................ : .-.................................. % Elongationin2-inches ........................... Reduction in Area +_ .............................. 75,000 to 80,000 psi 65,000 to 70,000 psi 62.000 to 67.000 ps_ 50,000 to 60,000 psi 20% to 29% 40% to 55% 27%to 35% 60% to 70% DESCRIPTION The AWS. E-60t3 isa general purpose mild steel elect+ode for use w_th AC or DC. tt produces a very stable. easily handled arc thr0ugh0:Ut a wide amperage range: Th:e moderately penetrating and easily directed arc providesexCeilent resuitsin ail positions fiat Wrticai 0roverhead) and is ideal for singIe pass horizontal fiilet:welds_ as {he weld metal: solidifies quickly producing a closeIy ri ppled deposit w,th good appearance. Even though mUlti-purpose it is designed for production use where So:un:d durable welds The arc fs easily amperages needed Use with AC welding in are required. mild steel fabrication, Started. even at: low amperage settings foi" ,light gauge steel, for higher Welding speeds and for heavier se_tiOns:: o_ DC [see recommended amperages)+ Hold a short this yet arc, lust !ong enough rod is excellent is stable at the for high to keep the electrode from touching the molten metal, tn flat position single pass fitlets or butt welds may be made with or without weaving: Weld from bottom up on vertical welding of heavy sect+ons. Welding down on light material or fiI]ets produces excellent results. Use 5i32+mch or smaller efectrodesfo_ overhead work, making rather stringer 2+2 or weaving beads. VV'ELD0 G ROD HARD SURFACING medium GENERAL APPLICATIONS: cultural Implements • Plow Drive Sprockets o etc. e Coal Cutters .... _ 3/32" 55-85 AC-DC chrome-carbon Tractor Shares SIZES Amperes Diameter SPECIFiCATiONS Grousers arrcl Rollers • Scraper Blades • Agri e Hitches • Power Shovel • Dipper Teeth and o Conveyor Rolls ANDHEATS 118" 100-130 electrode e Mining Buckets o Rock Crushers (AMPS) 5/32" t30-150 3116" t75-200 7/32" t75-250 { 1/4"' 225-275 SPECl FICATIONS Phys_cat Properties of As Welded Condition Deposited MetaJ (Rockwell "C" 46_50} ........................................ After C0ld Working (Rockwell "C'" 50-54) ......................................... 450-500 B_ineli Hardness 500-550 B_inell Hardness DESCRIPTION The Medium Chrome-Carbon rod is a hard-surfacing alloy steel electrode with a coating of powdered metals and flux. When welding, this special coating combines in the arc with the steel core w,re to gwe an extremely hard weld-metal deposit. Deposited weld metal requires no heat treatment for maximum strength, ductility, and wear resistance. Annealing or heat treating will not soften the metal deposit, which is not machinable, but may be hot for£ad to any desired shape. Deposited metal has a very fine grain and is free of stag and porosity. The metal is tough and highly resistant to wear and impact. The rod is designed for use with either AC or DC (either polarity). Hold a medium short arc and deposit the metal with a weaving motion. Excellent welding results are obtained in either the verticat or flat position. WELDING PROCEDURE: Grind the surface to clean and remove shallow cracks, rust, or other foreign material. Cracks too deep to be removed by grinding should be gouged out with a cutting torch or cutting rod. Use the "drag" technique to deposit weld metal, to thin edges when desirable or weave a wider bead, or use a "free" arc. 2_3 ROD AWS SPECIFICATmONS E.7014 CONTACT for welding GENERAL APPLICATIONS: Fabrication = Fabricating Welding. Sheet Constr=uction Structural Shapes of mild Metal stee| Fabrication EquDpment Repairs and Equipment Heavy AC-DC • and Storage e Repairs Tanks Equipment • e and Machinery Shipbuilding Heavy Pipe SIZES AND HEATS (AMPS} : Diameter .... 1/16" :: Length I 12" Amperes 3/32" t4" I18" 5/32" 3t16" I t4" 14" 18" 1 t!4" 18" 90-1t0 t30-165 190-210 200-250 J 250-350 SPECIFICATIONS Physical Properties Tensile Strength Yield Point of Deposited Metal: As Welded .............................................................. 72,000 psi to 76,000 psi .................................................................. % EI0ngation in 2-inches 60,000 psi to 69,000 psi .................................................................. 17% to 28% DESCR IPTION The AWS :E_r7014 iS an excellent w_Ih smooth'sUrge-flee coating which:makes weld €oolsl electrode Ideal for fikture welding where weld ::: permits use ir_alt wel:ding positions. wELDING PROCEDURi_S}: Either AC or DC current electrode in do#tact with 2-4 for the inexperienced or experienced welder. Starts on contact arc, also restr_kes instantly. This Craftsman electrode has powdered iron welding easier and faster. The slag is easy to remove in most cases self-peeling _eldmaterials may: be used: work: appearance should When and lack be ctean, arc is established, of spatter Best results deposit is imoortant. are obta,ned metal holding The when amount fit-up a short in the as the of slag is good. arc or place WE ...., , , , , m ROD i NG .... , , MACHmNABLE Castings APPLICATIONS: • Gears e Sprockets , ,, . CAST machineable GENERAL SPECaF,CATJONS welds IRON on all cast - AC-DC irons Cylinder Blocks e Crankcases • Casting Repairs in General ® Valve • Garages Seats e Defective • Farms o Shops SIZES AND HEATS (AMPS) Diameter I Amperes l 3/32" I 48-85 1 118" 75-130 5!32"' l 3/t6" 100-150 I 130175 i DESCRIPTION This electrode uses a nickel core wire, and produces a fully pre-heating the casting, Cast irons can be joined to steel, nickel This electrode characteristics. operates with AC or DC It is recommended for automotive repairs, and other cast iron parts, In maintenance many farm machinery polarityl. It has very without stable arc such as cylinder blocks, crank cases, valve seats and repairs it is used on gears, sprockets, and parts. WELDING PROCEDURE: weld, A cutting electrode to be made. This cutting soaked into the cast iron. Use the _owest amperage relieve strain and stress. ', (_everse machinable weld alloys and copper. Remove a!l dirt and grease from work piece before starting to may be used to burn a groove along the break where the weld is electrode removes the grease and sca_e, and then seals m any oi! that gives good fusion. ,_........... During cooling, ' peen hammer .... CUTTING ROD the weld to ._,_--- -, ,_:;i:_............... AC-DC quick, inexpensive, easily cuts through all metals GENERAL APPLICATIONS: Cutting o Piercing • Gouging e Scarfing * Beveling ,* etc. SIZES AND HEATS (AMPS) I Diameter ...... 3/'32" Amperes - AC 80150 Amperes ] 50-250 BC -L 1/8'" i 5132" _ 3/16" DESCRIPTION For p_erong, gouging, cutting, and scarfing. Excellent for removing old welds in preparation to rewelding. Also used for beveling cracks in castings or removing sharp edges prior to welding, Needs no oxygen or special eo,uJpme*_ to cut carbon steels, stainless steel, manganese steel, cast _ron, etc, Recommended for the owners of all arc we_ders. AC or DC. WELDING _he PROCEDURE: direction exceed 15 °. molten desrred metal .d(,pth of Strike travel, arc Ptace The electrode angle at s_.artmg ahead and away, has be_:,n reached. point. tf in holders between deeper the Push electrode gouge so that electrode it's positioned and along is required, the work line repeat like a lance in metal should not of cut, forcing the procedure until the 2_5 .... PARTS LIST FOR CRAFTSMAN AC 230 AMP/DC 140 AMP WELDER MODEL 113.201892 8 I 11 l 52 41 5O 14 48 47 41 46 15 44 16 17 18 19 _ 20 21 23 24 32 \ 30 \_ / 29 I 28 ..-.---4O 26 25 PARTS LiST FOR CRAFTSMAN AC 230 AMP/DC 140 AMP WELDER MODEL 113.201892 Always order by Part Number - Not by Key Number • Key No. Part No. 1 2 3 4 61435 61276 61424 60359 5 6 7 8 61350 61279 60325 STD601103 0 61335 61 355 61356 61334 -61391 61347 11 t2 13 14 15 16 17 18 19 20 21 61434 S']'D522510 61430 61428 61431 22 23 24 61432 61426 STD501102 25 26 27 28 61315 STD541006 S'TD551208 S-rD611007 29 30 60446 61433 Key No. Description Cabinet, Top Spacer Pointer Screw, Pan Rec. Type AB No. 10 x 1-1/4 Knob Assembly Bushing Washer, 3/8 x 1-3/8 x 3/64 *Screw, Pan Rec. Type "T" 10-32 x 3/8 Bracket, Guide Slide Assembly Guide Assembly, Shunt Spring ®Transformer Pin, Guide Shunt Assembly ®Choke Assembly Suppressor Assembly *Screw, Hex 1/4-20 x 1 Rectifier, 70 Amp 300 Volts Lead Rectifier, Reverse 70 Amp 300 Volts Sink, Heat Right Bracket, Fan *Screw, Set Hex Cup 10-32 x 1/4 Blade Assembly, Fan *Nut, Hex 6-32 *Lockwasher, External No. 8 *Screw, Pan Type AB No. 10 x 3/4 Grommet, Screw Sink, Heat Left * Standard locally. Hardware 31 32 33 34 35 36 Part No. 60444 STD541325 STD541025 61429 61314 STD611005 37 61470 38 STD551225 39 STD551010 40 51439 41 STD510607 42 447845 43 61295 44 30332 45 61171 46 61438 47 STD600603 48 49 50 51 52 53 54 55 56 57 58 59 60 -- 61474 STD541008 61478 60362 i61115 61116 STD551025 61117 61475 STD510805 61423 L9-1321 STD522507 61477 61351 •:i:i :¸¸ Description Washer, Spring *Nut, Hex 1/4-28 *Nut, Hex 1/4-20 Lead Motor *Screw, Pan Rec. Type AB No. !0 x 1/2 Holder, Electrode *Lockwasher, Internal 1/4 *Washer, 13/64 x 5/8 x 1/32 tClamp, Work i *Screw, Pan Hd. 6-32 x 3/4 Screw, Type "T" 1/4-20 x 1/2 Cable Assembly, Electrode Insulator, Plug Plug, Selector Cable Assembly, Work *Screw, Pan Hd. Ty "T" 6-32 x 7/16 Cabinet, Bottom *Nut, Hex 8-32 Switch Relief, Strain Block, Contact Mounting Contact, Selector Plug *Washer, 17/64 x 1 x 1/16 Block, Contact Mounting Cord *Screw, Pan Rec. 8-32 x 5/8 Block, Contact Mounting tHeimet *Screw, Hex 1/4-20 x 3/4 Owners Manual (Not lllus.) Bag of Loose Parts (Not Illus.) item -- May be purchased 1"Stock Item -- May be secured through the hardware department of most Sears Retail Stores or Catalog Houses. ® Not replaceable. 2-7 •:• I_IL AC 230 AMP/DO TRRPLE RANGE ARC WELDER SERVICE MODEL NO. Now that you have need ever exist for any Sears Service Co. stores. Be sure call or visit. 140 AMP purchased your arc welder, should a repair parts or service, simply contact Center and most Sears, Roebuck and to provide all pertinent facts when you The model number of your arc welder will be found on a plate attached to your welder, at the rear of the cabinet. 113.201892 HOW TO ORDER REPAIR PARTS WHEN ORDERING REPAIR FOLLOWING INFORMATION: PARTS, ALWAYS GIVE PART NUMBER PART DESCRIPTION MODEL NUMBER 113.201892 NAME OF ITEM AC 230 AMP/DC ARC WELDER THE t40 AMP Al! parts listed may be ordered from any Sears Service Center and most Sears stores. If the parts you need are not stocked locally, your order will be electronically transmitted to a Sears Repair Parts Distribution Center for handling. Sold by SEARS, Part No. 61477 ROEBUCK AND CO,, Form No. SP5081 Chicago, IL 60684 Printed U.S.A. in U.S.A. 3/87 : ii
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