Grizzly G0670 Lathe User Manual


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Failure to follow RPM and feed rate guide-
lines may threaten operator safety from
ejected parts or broken tools.
Calculating Spindle Speed
Figure 62.8jii^c\heZZYiVWaZ[dg=HHVcYXVgW^YZXjii^c\iddah#
Low Carbon
S
teel
High Carbon
A
nnealed Steel
Normalized
A
lloy Steel
A
luminum
A
lloys
Cast Iron Bronze
Cutting
S
peed SFM
(
Roughing)
90 50 45 200 70 100
F
eed Rate
I
PR
(
Roughing)
0.010"
to
0.020"
0.010"
to
0.020"
0.010"
to
0.020"
0.015"
to
0.030"
0.010"
to
0.020"
0.010"
to
0.020"
C
utting
S
peed SFM
(
Finishing)
120 65 60 300 80 130
F
eed Rate
I
PR
(
Finishing)
0.003"
to
0.005"
0.003"
to
0.005"
0.003"
to
0.005"
0.005"
to
0.010"
0.003"
to
0.010"
0.003"
to
0.010"
HSS Cutting Speed Table
SFM = Surface Feet per Minute
I
PR = Inches per Revolution
Note:
For carbide cutting tools, double the cutting speed. These values still may need slight
adjustment depending on cutting cutting tool rake and relief angles. Refer to the MACHINERY'S
HANDBOOK for more detailed information.
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