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Speed & Feed Rates

Speeds and Feeds For Carbide End Mills

Material SFM 1/8 inch 1/4 inch 1/2 inch 3/4 inch 1 inch
Aluminum/Aluminum Alloy 400-1200 0.005 0.002 0.004 0.006 0.008
Brass/Bronze 250-500 0.001 0.002 0.003 0.004 0.005
Plastics 500-1500 0.0015 0.003 0.006 0.01 0.012
Cast/Malleable Iron 100-500 0.0005 0.001 0.003 0.005 0.007
Nickel Alloys 50-150 0.0005 0.008 0.001 0.0013 0.002
Monel 100-200 0.0005 0.001 0.0015 0.003 0.004
Leaded Steels 150-400 0.0005 0.0013 0.003 0.004 0.0065
Hardened Steels 25-100 0.0002 0.0005 0.001 0.002 0.003
Tool Steels 30-150 0.0002 0.0008 0.0015 0.002 0.003
Ductile Iron 100-375 0.0005 0.001 0.002 0.003 0.005
Stainless Steels up to 40 Rc 200-400 0.0005 0.001 0.003 0.004 0.006
Stainless Steels 40 Rc & Up 50-250 0.0003 0.0005 0.0012 0.003 0.005
Low Carbon Steels 150-400 0.0005 0.001 0.003 0.0045 0.0065
Medium Carbon Steels 125-300 0.0005 0.001 0.002 0.004 0.005
Titanium (soft) 100-400 0.0004 0.001 0.002 0.003 0.005
Titanium (hard) 50-150 0.0003 0.0005 0.001 0.002 0.0035
TCT-Reamer-Chart

Recommended material for

Hole Diameter Material Left (Diameter)
.090-.170 .005-.010
.171-.280 .008-.012
.281-.880 .010-.016
.881-2.50 .015-.030
0500-Drill

Feeds for Drilling

Feeds Diameter
.001-.003 IPR .1250 or less
.002-.006 IPR .1250-.250
.004-.010 IPR .250-.500
.007-.015 IPR .500-1.00
.010-.025 IPR 1.00 and up

Metric-to-Standard Conversion Formula (millimeters to inches)
mm 4 25.4 = inches
Example:
12.70 mm 4 25.4 = .500 inches

Calculating Revolutions Per Minute (RPM) from Surface Footage (SFPM) Diameter
12 x SFPM = RPM
p x diameter

Speeds and Feeds
.002 – .003 per flute per revolution
.0025 x number of flutes
= inches per revolution

101 South Liberty Avenue, Suite 1
Freeport, IL 61032
Phone: 815-232-2300
Toll-free: 800-851-2874
Fax: 815-233-9729
sales@protocutter.com

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