Diamond Blade Saw RPM FAQ
Diamond Blade Speed Guidelines
- Diamond blades are designed to operate within a specific range of revolutions per minute (RPM). Operating these blades outside the effective RPM range will likely result in significant blade damage and can potentially cause severe injury or death to an operator or bystander if the blade shatters.
- The formula for calculating the surface feet per minute (SFM) at which a segment on the periphery of a blade is travelling is: SFM = diameter of the blade (in feet) x RPM x 3.14. Conversely, the RPM for a known SFM is determined as follows: RPM = SFM / (diameter of the blade (in feet) x 3.14).
| Diameter | Recommended RPM* |
Never Exceed RPM |
|
| 4" | (102mm) | 9,000 | 15,200 |
| 4-1/2" | (114mm) | 8,000 | 13,500 |
| 5" | (127mm) | 7,200 | 12,200 |
| 5-1/2" | (140mm) | 6,500 | 11,090 |
| 6" | (152mm) | 6,000 | 10,185 |
| 7" | (178mm) | 5,100 | 8,730 |
| 8" | (203mm) | 4,500 | 7,640 |
| 9" | (229mm) | 4,000 | 6,700 |
| 10" | (254mm) | 3,600 | 6,115 |
| 12" | (305mm) | 3,000 | 5,095 |
| 12" High Speed Blades | 6,300 | ||
| 14" | (356mm) | 2,500 | 4,365 |
| 14" High Speed Blades | 5,460 | ||
| 16" | (406mm) | 2,200 | 3,800 |
| 16" High Speed Blades | 4,725 | ||
| 18" | (457mm) | 2,000 | 3,300 |
| 20" | (508mm) | 1,800 | 3,000 |
| 22" | (559mm) | 1,600 | 2,780 |
| 24" | (610mm) | 1,500 | 2,550 |
| 26" | (660mm) | 1,300 | 2,350 |
| 28" | (711mm) | 1,200 | 2,185 |
| 30" | (762mm) | 1,200 | 2,040 |
| 32" | (813mm) | 1,100 | 1,910 |
| 36" | (914mm) | 1,000 | 1,700 |
| 42" | (1067mm) | 800 | 1,455 |
| 48" | (1219mm) | 700 | 1,275 |
| * Recommended RPM based on 9,500 SFPM |