Diamond Core Bit Speed Guidelines

Wet Bit Diameter Max/Min RPM*
1" - 2" (25mm - 51mm) 1,200 - 1,000
2-1/4 " - 5" (57mm - 127mm) 1,000 - 500
5-1/4" - 12" (134mm - 305mm) 500 - 250
Dry Bit Diameter Max/Min RPM*
1" - 1-1/2" (25mm - 38mm) 6000 - 2300
1-3/4" (44mm) 5000 - 1600
2" - 2-1/4" (51mm - 57mm) 5000 - 1200
2-1/2" (64mm) 5000 - 800
3" - 5" (76mm - 127mm) 5000 - 700
6" (152mm) 5000 - 600
* Based upon the Optimum Performance Speed
calibrated in Surface feet per Minute (SFM).