Diamond Core Bit Speed Guidelines
Core Bit RPM
Diameter Min. Ideal Max.
2" 1,200 1,600 2,000
3" 800 1,050 1,300
4" 600 800 1,000
5" 475 640 800
6" 400 560 665
7" 340 450 600
8" 300 400 500
10" 240 320 400
12" 200 265 30
14" 170 225 285
16" 150 200 250
18" 130 175 220