Suggested Speeds (RPM) for RotaCut™ Sheet Metal Cutters
and Holcutter™*
Diameter
Inches |
Decimal Equivalent |
Mild Steel |
Soft Aluminum |
Stainless Steel
and Tool Steel |
1/4" |
0.2500 |
1530 |
11920 |
765 |
5/16" |
0.3125 |
1220 |
9535 |
610 |
3/8" |
0.3750 |
1020 |
7945 |
510 |
7/16" |
0.4375 |
875 |
6810 |
440 |
1/2" |
0.5000 |
765 |
5960 |
380 |
|
9/16" |
0.5625 |
680 |
5300 |
340 |
5/8" |
0.6250 |
610 |
4770 |
300 |
11/16" |
0.6875 |
560 |
4335 |
280 |
3/4" |
0.7500 |
510 |
3975 |
255 |
13/16" |
0.8125 |
470 |
3670 |
235 |
|
7/8" |
0.8750 |
440 |
3405 |
220 |
15/16" |
0.9375 |
410 |
3180 |
205 |
1" |
1.0000 |
385 |
2980 |
190 |
1-1/16" |
1.0625 |
360 |
2805 |
180 |
1-1/8" |
1.1250 |
340 |
2650 |
170 |
|
1-1/4" |
1.2500 |
305 |
2385 |
155 |
1-5/16" |
1.3125 |
290 |
2270 |
145 |
1-3/8" |
1.3750 |
280 |
2170 |
140 |
1-7/16" |
1.4375 |
270 |
2075 |
135 |
1-1/2" |
1.5000 |
255 |
1985 |
130 |
|
1-9/16" |
1.5625 |
245 |
1910 |
120 |
1-5/8" |
1.6250 |
235 |
1835 |
120 |
1-11/16" |
1.6875 |
225 |
1765 |
110 |
1-3/4" |
1.7500 |
220 |
1700 |
110 |
1-13/16" |
1.8125 |
210 |
1645 |
105 |
|
1-7/8" |
1.8750 |
205 |
1590 |
100 |
1-15/16" |
1.9375 |
200 |
1540 |
100 |
2" |
2.0000 |
190 |
1490 |
95 |
2-1/16" |
2.0625 |
185 |
1445 |
95 |
2-1/8" |
2.1250 |
180 |
1400 |
90 |
|
2-1/4" |
2.2500 |
170 |
1325 |
85 |
2-5/16" |
2.3125 |
165 |
1490 |
85 |
2-3/8" |
2.3750 |
160 |
1255 |
80 |
2-7/16" |
2.4375 |
160 |
1220 |
80 |
2-1/2" |
2.5000 |
150 |
1190 |
75 |
|
2-9/16" |
2.5625 |
150 |
1160 |
75 |
2-5/8" |
2.6250 |
146 |
1135 |
70 |
2-11/16" |
2.6875 |
140 |
1110 |
70 |
2-3/4" |
2.7500 |
140 |
1080 |
70 |
2-13/16" |
2.8125 |
135 |
1060 |
65 |
|
2-7/8" |
2.8750 |
130 |
1035 |
65 |
2-15/16" |
2.9375 |
130 |
1015 |
65 |
3" |
3.0000 |
130 |
990 |
65 |
Note: These are just starting points and speed may have to be adjusted accordingly.
For Metric Cutters use closest fractional size.
*For longest tool life and best performance, always use
RotaMagic™ Cutting Fluid or Slick Stik™ Lubricant.
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