Welcome to your guide for Feeds and Speeds!

 

I am personally tired of looking up 14 different sources for carbide drills, end mills, and other tools so I decided to put everything I find here on this page. On a normal day to day I know my feeds and speeds to get the job done, but there is always room for improvement and there will always be a special tool that needs to be looked up. Ill be improving this page on a monthly basis until I get it completely organized. Enjoy!

(Check out our Formulas page for more information)

 

SFPM to RPM= SFPM*4 / Diameter of tool

SPINDLE SPEED


Taps

SFPM=Surface Feet Per Minute

Material

SFPM

Lubricant

Aluminum

70-90

Soluble Oil

Brass

60-100

Light base Oil

Copper

60-80

Light base Oil

Grey Cast Iron

30-60

Dry or soluble oil

Alloy Cast Iron

15-30

Sulphur Based Oil

Malleable Iron

20-40

Soluble Oil

Magnesium

50-70

Soluble Oil

Plastics

50-70

Dry, Liquid Soap

Mild Steel

30-50

Sulphur Based Oil

Carbon Steel to 4%

20-40

Sulphur Based Oil

Carbon Steel to 7%

20-30

Sulphur Based Oil

Carbon Steel to 7% or more

15-25

Sulphur Based Oil

Stainless Steels

10-20

Sulphur Based Oil

Tool Steels

15-25

Sulphur Based Oil

 

Drilling, Reaming and Counterboring


 

Drilling

Material

SFPM

Aluminum-

200-300

Bakelite-

100-150

Plastics-

100-150

Brass and bronze-

200-300

Bronze, high tensile

70-100

Cast iron, chilled

30-40

Cast iron hard

70-100

Cast iron soft

100-150

Magnesium

250-400

Malleable iron

80-90

Monel, metal

40-50

Nickel

40-60

Steel annealed

60-70

Forged steel

50-60

Stainless, easy

60-70

Stainless, hard

30-40

Tool steel

50-60

Slate marble and stone

15-25

Wrought Iron

50-60

 

Reaming and Counterboring

Material

SFPM

REAMING

SFPM

COUNTERBORE

Steel, 1018

65

45

Steel, 4140

60

40

Steel, 4340

45

30

Stainless Steel, 303 ( Easy )

50

50

Stainless Steel, 304 ( Hard )

35

25

Aluminum

300

125

Plastic

180

150

Polycarbonate

160

120

 

 

 

 

FEEDRATES


 

Drilling and Reaming


Drill Diameter

Feed (IPR)

Under .125

.001-.002

.125-.25

.002-.004

.25-.5

.004-.007

.5-1.

.007-.015

Reamer Diameter

Feed (IPR)

Under .125

.003-.006

.125-.25

.005-.009

.25-.375

.007-.012

.375-.5

.01-.015

.5-.75

.015-.031

 

Counterboring

Counterbore Diameter

Feed (IPR)

.375

.004

.625

.005

.875

.006

 

 

 

 

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