Helical and Bickford Drill Point
Feed and Speed Chart
 
Recommended Drill Speeds in Surface ft./min. for High Speed Steel Drills
Material
15-20
20-40
40-60
60-80
80-120
120-200
 200-300
300-400
Aluminum
Aluminum alloys
Bronze (high tensile)
Die casting (zinc base)
Cast iron (soft)
Cast iron (medium hard)
Cast iron (hard chilled)
Cast iron (malleable)
Hastelloy
Inconel
Magnesium
Magnesium alloy
Monel
High nickel steel
Mild steel (.2-.3 carbon)
Steel (.4-.5 carbon)
Tool steel
Forgings
Steel alloys (300-400 brinell)
High tensile (heat treat)
35-40 Rockwell C
40-45 Rockwell C
45-50 Rockwell C
50-55 Rockwell C
Stainless steel free machining
Stainless work hardening
Titanium alloys:
TI-75A
RS-120
TI-150A
RC-130B
MST6A1-4 VA
MST3A1-5 CR
 

Recommended Feeds: in./revolution for
Form-ground, S-shaped Drills
Drill Size (in.)
I.P.R.
.0 -.62
.078 - .125
.140 -.187
.203 - .250
.265 - .313
.328 - .375
.390 - .437
.453 - .500
.514 - .625
.640 - .750
.765 - .875
.890 - 1.000
1.015 - 1.250
1.265 - 1.500
 .0015
.003
.004
.007
.009
.011
.012
.013
.016
.019
.022
.024
.026
.027
Drilling Formulas
Surface ft./min. Multiply rpm times drill dia. (in.) times 0.26
RPM Surface ft. per min. divided by drill dia. multiplied by 3.85
In./min. Multiply RPM times in. per revolution
These charts are intended as a guideline. Machine, material, and applications can and will affect drill feeds and speeds.

S.F.M. and feed chart for Helical and Bickford Point. This chart is intended as guideline using Helical and Bickford Points. Machines material and applications can and will affect drill feeds and speeds. In some cases this will result in deviation from speeds and speeds listed above.

For a Printable PDF file of this chart "Click Here"

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