Surface Speed to RPM Conversions

Work Diameter
inches
Surface Speed (feet per minute)
50
60
70
80
90
100
110
120
130
140
1/16"
3056
3667
4278
4889
5500
6112
6723
7334
7945
8556
1/8"
1528
1833
2139
2445
2750
3056
3361
3667
3972
4278
3/16"
1019
1222
1426
1630
1833
2037
2241
2445
2648
2852
1/4"
764
917
1070
1222
1375
1528
1681
1833
1986
2139
5/16"
611
733
856
978
1100
1222
1345
1467
1589
1711
3/8"
509
611
713
815
917
1019
1120
1222
1324
1426
7/16"
437
524
611
698
786
873
960
1048
1135
1222
1/2"
382
458
535
611
688
764
840
917
993
1070