TMCO Tools - A division of Time Machine, Inc.

TMCO
Tools
A Division of Time Machine, Inc.

INTRODUCTION

APPLICATIONS

FEEDS AND SPEEDS

AMERICAN SIZES

METRIC SIZES

CENTER CUTTING

E-MAIL

LINKS

TIME MACHINE, INC.

F E E D S A N D S P E E D S

FEEDS AND SPEEDS

MATERIAL

COATED

SFM

CHIP
LOAD

UNCOATED

SFM

CHIP
LOAD

Carbon Steels and
Annealed Alloy
up to 200 B.H.N.

400
to
600

.003
to
.005

250
to
400

.003
to
.005

Heat-Treated Steels
up to 350 B.H.N.

300
to
500

.003
to
.005

150
to
250

.003
to
.005

Cast Iron

300
to
500

.005
to
.010

150
to
250

.003
to
.005

Brass/Bronze

300
to
800

.005
to
.010

300
to
800

.005
to
.010

Aluminum

400
to
1000

.005
to
.010

400
to
1000

.005
to
.010

The above speeds and feeds are for starting out. Listen to your machine and watch insert wear. If your equipment is not rigid, decrease chip load. If you see carbide wearing off too fast, decrease surface speed. If you see insert chip, increase surface speed or decrease chip load.

Use the following formulas to determine speeds and feeds.

FEED IPM = L * T * R

RPM = 4C / D

C = Surface Speed D = Diameter of cutter L = Chip Load *T = Number of Teeth R = RPM

* The T (number of teeth) on the center cutting tools is one effective, while on the American and Metric counterboring tools are two effective.