Us e r 's GU i d e — 33
FEED raTE
Feed Rate is the speed of the cutting tool’s movement relative
to the workpiece as the tool makes a cut. You can calculate
Feed Rate given values for Cutting Feed and RPM (Spindle
Speed). If you don’t know the Cutting Feed, you can calculate
Feed Rate with Feed per Tooth (Chip Load), Number of Teeth
and RPM.
Feed Rate – Based on Cutting Feed and RPM (for Turning)
Calculate the Feed Rate if you are turning a 1” steel round
stock down with a Cutting Feed of 0.031 Inches per revolution
and a rotational speed of 900 RPM (Spindle Speed):
KEYSTROKE DISPLAY
OO
0.
1. Enter the Cutting Feed:
.031c
CUT 0.031 INCH/REV
2. Enter the RPM:
900R
RPM 900.
3. Calculate the Feed Rate:
f
FEED 27.9000 INCH/MIN
f
RPM 900.
f
CUT 0.031 INCH/REV
Feed Rate – Based on Cutting Feed and RPM (for Drilling)
Calculate the Feed Rate for a drilling operation that is using a
recommended Cutting Feed of 0.004 Inches per revolution at
800 RPM (Spindle Speed):
(cont'd)
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