Melin Catalog 2005 Speed And Feed Countersink Data

Speed_and_Feed_-_Countersink_Data Speed_and_Feed_-_Countersink_Data Milling

User Manual: Speed-and-Feed-Countersink-Data Speeds and Feeds

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TECHNICAL DATA

COUNTERSINKS

Speed Data - Applications in Various Materials

COUNTERSINK TYPE

HSS M42 8% COBALT WITH TiN CARBIDE

Material SFM SFM SFM

Aluminum Alloys 150-250 180-300 300-500

Brass ( Bronze) 75-125 95-150 150-250

Cast Iron 75-125 95-150 125-225

Malleable Iron 80-90 100-115 90-150

Magnesium 125-250 150-300 250-400

Inconel/Monel 30-50 40-65 50-75

Plastic 100-250 125-300 250-400

Mild Steel 70-100 85-125 80-170

Steel - Annealed 40-50 50-65 50-80

Steel - Rc 18-24 30-40 40-50 40-60

Steel - Rc 25-37 25-35 30-45 35-55

Stainless Steel - Free Machining 30-80 40-100 80-125

Stainless Steel - Other 15-50 20-65 50-75

Titanium 50-60 60-75 60-90

Note: All speeds are suggested starting points. You may have to change either by increas-

ing or decreasing speed depending on machine condition, finish required, and/or if coolant is

used.

Feed on single flute countersinks should not exceed .005” per revolution on large diameters.

Multiple flute countersinks are designed for increased feed rates. A controlled feed rate will

result in better surface finish.

All Melin countersinks are manufactured on CNC grinders to insure consistant and accurate

flute spacing. Carbide countersinks should be used in rigid tool holders to maximize tool life.

COUNTERSINKS

Nose Diameter for Pre-setting CNC Precision Countersinks

NC POINT DIA.

SIZE 60° 82° 90° 100° 110° 120°

0.188 0.058 0.032 0.032 0.032 0.032 0.032

0.250 0.078 0.046 0.046 0.046 0.046 0.046

0.313 0.080 0.047 0.047 0.047 0.047 0.047

0.375 0.125 0.078 0.078 0.078 0.062 0.062

0.438 0.140 0.096 0.096 0.096 0.070 0.070

0.500 0.156 0.109 0.109 0.109 0.078 0.078

0.625 0.203 0.125 0.125 0.125 0.109 0.109

0.750 0.250 0.156 0.156 0.156 0.125 0.125

0.875 0.281 0.172 0.172 0.172 0.140 0.140

1.000 0.328 0.203 0.203 0.203 0.171 0.171