Grizzly G4000 Owner's Manual page 35

Calculating Correct Spindle Speed
1. Figure 43
Note: Cutting speeds are expressed in SFM
(surface feet per minute) that the workpiece
moves against the cutter, which is different
from the spindle speed (RPM).
Recommended Cutting Speeds
Rough Cuts
Note: These values are based on HSS cutting
tools. For carbide cutting tools, double the aver-
age speed. These values are a guideline only.
Refer to the MACHINERY'S HANDBOOK for
more detailed information.
Figure 43.
2.
Note: For this step, you will need to aver-
age out the diameters or work with the finish
diameter.
3.
Finish Cuts
Cutting Speed (SFM) x 4
Spindle Speed =
Diameter of Cut
Example A:
Step 1:
Step 2:
Result:
Example B:
Step 1:
Step 2:
Step 3:
Result: