Hole Saw
HSS Bi-Metal Hole Saw RPM Chart
SIZE(INCHES)
SIZE(MM)
MILD STEEL
TOOL&STAINLESS
CAST IRON
BRASS
ALUMINUM
9/6"
14
580
300
400
790
900
5/8"
16
550
275
365
730
825
11/16"
17
500
250
330
665
750
3/4"
19
460
230
300
600
690
20
425
210
280
560
630
3/16"
21
425
210
280
560
630
7/8"
22
390
195
260
520
585
15/16"
24
370
185
245
495
555
1"
25
350
175
235
470
525
1-1/16"
25
330
160
210
420
470
1-1/8"
28
325
155
205
415
465
29
290
150
195
385
430
1-3/16"
30
285
145
190
380
425
1-1/4"
32
275
140
180
360
410
1-5/16"
33
260
135
175
345
390
1-3/8"
35
285
145
190
380
425
1-7/16"
37
240
120
160
315
360
1-1/2"
38
230
115
150
300
345
1-9/16"
40
220
110
145
290
330
1-5/8"
41
210
105
140
280
315
1-11/16"
43
205
100
135
270
305
1-3/4"
44
195
95
130
250
295
1-13/16"
46
190
95
125
250
285
1-7/8"
48
180
90
120
240
270
2"
51
170
85
115
230
255
2-1/16"
52
165
80
110
220
245
2-1/8"
54
160
80
105
210
240
2-1/4"
57
150
75
100
200
225
2-5/16"
59
145
70
95
100
220
2-3/8"
60
140
70
95
190
220
2-1/2"
64
135
65
90
180
205
2-9/16"
65
130
65
85
175
200
2-5/8"
67
130
65
85
170
195
2-11/16"
68
130
65
85
170
195
2-3/4"
70
125
60
80
160
185
2-7/8"
73
120
60
80
160
180
3"
76
115
55
75
150
170
3-1/8"
79
110
55
70
140
165
3-1/4"
83
105
50
70
140
155
3-3/8"
86
100
50
70
140
150
3-1/2"
89
95
45
65
130
145
3-5/8"
92
95
45
60
120
140
3-3/4"
95
90
45
60
120
135
3-7/8"
98
85
40
55
110
130
4"
102
85
40
55
110
120
4-1/8"
105
80
40
55
110
120
4-1/4"
108
80
40
55
110
120
4-3/8"
111
75
35
50
100
105
4-1/2"
114
75
35
50
100
105
4-3/4"
121
70
35
45
90
95
5"
127
65
30
40
85
90
5-1/4"
133
60
30
35
80
85
5-1/2"
140
60
30
35
80
85
5-3/4"
146
55
25
35
80
85
6"
152
55
25
35
75
85
6-1/2"
165
45
20
30
65
75
7"
178
40
20
30
60
70
Suggested RPM's only
