
7
Mechanical Hot Tapping Machine
Operator’s Manual
Recommended Hole Sawing Speeds (RPM)
for Bi-Metal Saws
Mild/
Size Size Galvanized Stainless Copper/
Inches
mm
Steel
Steel
Brass Aluminum PVC
5/8 16 530 275 730 825
7/8
22
390
195
520
585
1 1/8
29
300
150
400
450
1 3/8
35
250
125
330
375
1
3/4
44 195 95 260 295
2
1/4
57 150 75 200 230
3
1/4”
83 105 50 140 155
NOT
SPECIFIED