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| Diamond Blade Speed Guidelines
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| 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 |
| 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 |
| Lapidary Blade Speed Recommendations |
| Blade Diameter |
RPM |
| 4" (102mm) |
4300 - 5730 |
| 5" (127mm) |
3440 - 4580 |
| 6" (152mm) |
2870 - 3820 |
| 7" (178mm) |
2460 - 3270 |
| 8" (203mm) |
2150 - 2870 |
| 9" (229mm) |
1910 - 2550 |
| 10" (254mm) |
1720 - 2290 |
| 12" (305mm) |
1430 - 1910 |
| 14" (356mm) |
1230 - 1640 |
| 16" (406mm) |
1070 - 1430 |
| 18" (457mm) |
960 - 1270 |
| 20" (508mm) |
860 - 1150 |
| 24" (610mm) |
720 - 960 |
| 30" (762mm) |
570 - 760 |
| 36" (914mm) |
480 - 640 |
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