Diamond core bit operating speeds base on 9500 SFPM (Surface Feet per Minute). Diamond core bit cutting depths listed above are approximate. Actual cutting depth will vary with the exact core bit diameter and core drill machine types.
Wet Concrete Core Bit:
Diameter (INCH) |
Minimum Speed (RPM) |
Maximum Speed (RPM) |
1" |
1,600 |
1,800 |
2" |
1,400 |
1,600 |
3" |
800 |
1,300 |
4" |
600 |
1,000 |
5" |
475 |
800 |
6" |
400 |
670 |
7" |
350 |
600 |
8" |
300 |
500 |
9" |
260 |
450 |
10" |
240 |
400 |
12" |
200 |
350 |
14" |
160 |
300 |
Dry Masonry Core Bits:
Diameter (INCH) |
Minimum Speed (RPM) |
Maximum Speed (RPM) |
1" |
2,300 |
6,000 |
2" |
1,200 |
5,000 |
3" |
700 |
5,000 |
4" |
700 |
5,000 |
5" |
700 |
5,000 |
6" |
600 |
5,000 |
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