Power Feed
Figure 54
Machinery's Handbook
Note: This chart provides the cutting speed (SFM)
for a given feed rate. You must use the cutting
speed with the formula on Page 39 to calculate
the correct spindle speed (RPM) for the chosen
feed rate.
Low Carbon
Steel
High Carbon
Annealed
Steel
Normalized
Allow Steel
Aluminum
Alloys
Cast Iron Bronze
Rough
Cutting
Speed SFM
Rough Feed
Rate IPR
Finish
Cutting
Speed SFM
Finish Feed
Rate IPR
SFMIPR
Note: These values are for HSS cutting tools. For carbide cutting tools, double the cutting speed. These
values still may need slight adjustment depending on the cutting tool rake and relief angles. Refer to the
MACHINERY'S HANDBOOK for more detailed information.
Figure 54.
Understanding the Feed Rate &
Threading Charts
Figure 55Page 41
NOTICE
ALWAYS make sure the spindle is turned
OFF and is at a complete stop before
changing any gear configuration to prevent
damage to the lathe gearing and voiding the
warranty.
