Speed Charts

BLADE SPEED CHART
RPM 14" 16" 18" 20" 24" 28" 30" 32" 34" 36"  
350 1,283 1,466 1,649 1,833 2,199 2,566 2,749 2,932 3,115 3,299  
450 1,649 1,885 2,121 2,356 2,827 3,299 3,534 3,770 4,006 4,241 Granite
584 2,140 2,446 2,752 3,058 3,669 4,281 4,587 4,893 5,198 5,504  
729 2,672 3,054 3,435 3,817 4,580 5,344 5,726 6,107 6,489 6,871  
820 3,005 3,435 3,864 4,294 5,152 6,011 6,440 6,870 7,299 7,728 Marble
944 3,460 3,954 4,448 4,943 5,931 6,920 7,414 7,908 8,403 8,897  
1,050 3,848 4,398 4,948 5,498 6,597 7,697 8,247 8,796 9,346 9,896  
1,167 4,277 4,888 5,499 6,110 7,332 8,555 9,166 9,777 10,388 10,999 Limestone
1,250 4,581 5,236 5,890 6,545 7,854 9,163 9,817 10,472 11,126 11,781  
1,330 4,875 5,571 6,267 6,964 8,357 9,749 10,446 11,142 11,839 12,535  
1,458 5,344 6,107 6,871 7,634 9,161 10,688 11,451 12,215 12,978 13,741  
1,556 5,703 6,518 7,332 8,147 9,777 11,406 12,221 13,036 13,850 14,665  
1,641 6,015 6,874 7,733 8,592 10,311 12,029 12,888 13,748 14,607 15,466  
1,750 6,414 7,330 8,247 9,163 10,996 12,828 13,744 14,661 15,577 16,493  
                       
                       
Recommended Core Drill Speed Chart  
Speed (Meters/Sec.) 3.05 3.56 4.07 4.57 5.08 5.59 6.1 6.61    
Speed (FPM) 600 700 800 900 1,000 1,100 1,200 1,300    
                       
Dia. mm Diameter Dia Dec. RPM RPM RPM RPM RPM RPM RPM RPM  
13 1/2" 0.5 4,580 5,350 6,110 6,880 7,640 8,400 9,170 9,930  
16 5/8" 0.625 3,670 4,280 4,890 5,500 6,110 6,720 7,330 7,950  
19 3/4" 0.75 3,060 3,570 4,070 4,580 5,090 5,600 6,110 6,620  
22 7/8" 0.875 2,620 3,060 3,490 3,930 4,370 4,800 5,240 5,680  
25 1" 1 2,290 2,670 3,060 3,440 3,820 4,200 4,580 4,970  
29 1 1/8" 1.125 2,040 2,380 2,720 3,060 3,400 3,730 4,070 4,410  
32 1 1/4' 1.25 1,830 2,140 2,440 2,750 3,060 3,360 3,670 3,970  
35 1 3/8" 1.375 1,670 1,940 2,220 2,500 2,780 3,060 3,330 3,610  
38 1 1/2" 1.5 1,530 1,780 2,040 2,290 2,550 2,800 3,060 3,310  
41 1 5/8" 1.625 1,410 1,650 1,880 2,120 2,350 2,590 2,820 3,060  
44 1 3/4" 1.75 1,310 1,530 1,750 1,960 2,180 2,400 2,620 2,840  
51 2" 2 1,150 1,340 1,530 1,720 1,910 2,100 2,290 2,480  
57 2 1/4" 2.25 1,020 1,190 1,360 1,530 1,700 1,870 2,040 2,210  
60 2 3/8" 2.375 960 1,130 1,290 1,450 1,610 1,770 1,930 2,090  
64 2 1/2" 2.5 920 1,070 1,220 1,380 1,530 1,680 1,830 1,990  
70 2 3/4" 2.75 830 970 1,110 1,250 1,390 1,530 1,670 1,810  
76 3" 3 760 890 1,020 1,150 1,270 1,400 1,530 1,660  
89 3 1/2" 3.5 650 760 870 980 1,090 1,200 1,310 1,420  
102 4" 4 570 670 760 860 950 1,050 1,150 1,240  
127 5" 5 460 530 610 690 760 840 920 990  
152 6" 6 380 450 510 570 640 700 760 830  
178 7" 7 330 380 440 490 550 600 650 710  
203 8" 8 290 330 380 430 480 530 570 620  
229 9" 9 250 300 340 380 420 470 510 550  
254 10" 10 230 270 310 340 380 420 460 500  
279 11" 11 210 240 280 310 350 380 420 450  
305 12" 12 190 220 250 290 320 350 380 410  

All speeds are recommended and may change with wet or dry usage and bit type. Please call for exact speed usage for your items.