Hougen RotaCut and Hole Cuter Suggest Speeds Chart

Suggested Speeds (RPM) for RotaCut™ Sheet Metal Cutters and Holcutter™*
DiameterInches	Decimal Equivalent	Mild Steel	Soft Aluminum	Stainless Steel and Tool Steel
1/4"	0.25	1530	11920	765
5/16"	0.3125	1220	9535	610
3/8"	0.375	1020	7945	510
7/16"	0.4375	875	6810	440
1/2"	0.5	765	5960	380

9/16"	0.5625	680	5300	340
5/8"	0.625	610	4770	300
11/16"	0.6875	560	4335	280
3/4"	0.75	510	3975	255
13/16"	0.8125	470	3670	235

7/8"	0.875	440	3405	220
15/16"	0.9375	410	3180	205
1"	1	385	2980	190
1-1/16"	1.0625	360	2805	180
1-1/8"	1.125	340	2650	170

1-1/4"	1.25	305	2385	155
1-5/16"	1.3125	290	2270	145
1-3/8"	1.375	280	2170	140
1-7/16"	1.4375	270	2075	135
1-1/2"	1.5	255	1985	130

1-9/16"	1.5625	245	1910	120
1-5/8"	1.625	235	1835	120
1-11/16"	1.6875	225	1765	110
1-3/4"	1.75	220	1700	110
1-13/16"	1.8125	210	1645	105

1-7/8"	1.875	205	1590	100
1-15/16"	1.9375	200	1540	100
2"	2	190	1490	95
2-1/16"	2.0625	185	1445	95
2-1/8"	2.125	180	1400	90

2-1/4"	2.25	170	1325	85
2-5/16"	2.3125	165	1490	85
2-3/8"	2.375	160	1255	80
2-7/16"	2.4375	160	1220	80
2-1/2"	2.5	150	1190	75

2-9/16"	2.5625	150	1160	75
2-5/8"	2.625	146	1135	70
2-11/16"	2.6875	140	1110	70
2-3/4"	2.75	140	1080	70
2-13/16"	2.8125	135	1060	65

2-7/8"	2.875	130	1035	65
2-15/16"	2.9375	130	1015	65
3"	3	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.

Suggested Speeds (RPM) for RotaCut™ Sheet Metal Cutters and Holcutter™*