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For Additional Technical Information Please Email - customerservice@newyorktwistdrill.com

FEEDS FOR HIGH SPEED STEEL DRILLS
Drill Diameter-Inches Feed In Inches Per Revolution
1/16 to 1/8 .001-.003
Over 1/8 to 1/4 .002-.006
1/4 to 1/2 .004-.010
Over 1/2 to 1" .007-.015
Over 1" .015-.025

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SUGGESTED FEEDS AND SPEEDS FOR SPECIAL MATERIALS

Material

Speed In Feet Per Minute

Aluminum and its Alloys

200-300

Brass and Bronze (Ordinary)

150-300

Bronze (High Tensile)

70-150

Die Castings (Zinc Base)

300-400

Iron-Cast (Soft)

Cast (Medium Hard)

Hard Chilled

Malleable

75-125

50-100

10-20

80-90

Magnesium and its Alloys

250-400

Monel Metal or High-Nickel Steel

30-50

Plastics or Similar Materials(Bakelite)

100-300

Steel-Mild .2 Carbon to .3 Carbon

Steel .4 Carbon to .5 Carbon

Tool 1.2 Carbon

Forgings

Alloy-300 to 400 Brinell

80-110

70-80

50-60

40-50

20-30

Steel-High Tensile

35-45 Rockwell C

40-45 Rockwell C

45-50 Rockwell C

50-55 Rockwell C

30-40

25-35

15-25

7-15

Stainless Steel

Free Machining Grades

Work Hardening Grades

30-80

15-50

Titanium Alloy Sheet

50-60

Titanium Alloy

Ti-75A (Commercially Pure)

RS-120

Ti-150A

Ti-140A

RC-130B

MST 6A1-4 Va.

MST 3A1-5 Cr.

50-60

40-60

40-50

30-40

30-40

20-35

10-20

Wood

300-400

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FEEDS FOR CARBIDE DRILLS

Drill Diameter-Inches

Feed In Inches Per Revolution

1/16 to 1/8

.001-.002

Over 1/8 to 1/4
.002-.004
Over 1/4 to 1/2
.003-.007
Over 1/2 to 1"
.005-.012
Over 1" to 1-1/4
.008-.015

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SUGGESTED SPEEDS FOR CARBIDE DRILLS

Material

Speed In Feet Per Minute

Aluminum

150-500

Brass

150-300

Bronze

150-300

Cast Iron (Soft)

Drill Sizes 1/8 thru 1"

Drill Sizes Over 1"

Chilled

Hard

90-165

125

30-50

100-140

Copper

200-300

Non-Ferrous Alloys

150-200

Plastic

Phenolic, etc.

Glass Bonded

100-200

50-125

Rubber

200-300

Wood

200

Glass

20

*Steel (Over 450 Brinell)

75-100