Spindle Speed - Grizzly G9972Z Owner's Manual

Spindle Speed

Calculating the Correct Spindle RPM
1. Figure 35
Note: Cutting speeds are expressed in sur-
face feet per minute (SFM) that the cutter
moves against the workpiece.
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 35.
2.
3.
Finish Cuts
Note: For this step, you will need to aver-
age out the diameters or work with the finish
diameter.
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: