Spindle RPM Guidelines
for SFPM Calculator

Use calculator to find approximate wheel surface feet per minute by entering  the fastest spindle speed RPM, the wheel diameter, and the selected drive percentage. The calculator easily allows you to compensate for wheel wear during buffing applications. 

You can also use the calculator to find approximate SFPM on disc grinders.  To calculate disc grinder enter motor RPM and select the area you are using on the disc pad.   Measure from center and enter in the wheel diameter box.

* 0%  set to minimum of 10% speed from factory

562 - 4140 RPM - 5" Contact Wheel

482 - 4140 RPM  - 4.75" Contact Wheel

760 - 4140 RPM - 7" Contact Wheel

1400 Series Small Arm - 4140 RPM - 3" diameter

960-250 - 4140 RPM - 7" Contact Wheel

960-272 - 3000 RPM - 8" or 10"  Contact Wheel

965 Series Small Wheel - 3000 RPM - 5" Contact Wheel

960-400 - 3450 RPM - 7" Contact Wheel

BBA20 - 1150 RPM - 20" Contact Wheel

M600 - 4140 RPM - 6" Wheel

M800 - 4140 RPM - 8" Wheel

M1000 - 2500 RPM - 10" Wheel

M1001 - 2500 RPM - 10" Wheel

M1200 - 2200 RPM - 12" Wheel

Download a SFPM pdf chart you can print