| RECOMMENDED
TAPPING SPEEDS FOR DIFFRENT MATERIALS
These speeds are approx. and intended
as a general guide only. The most effective speeds should be determined by actual
and tapping fluid. The taps used should be of High-speed steel.
| Thread Inches Metric |
1/16
1.7 | 3/16
4 | 1/4
6 |
5/16
8 | 3/8
10 | 1/2
12 |
5/8
16 | | Steel | 750 | 525 | 450 | 375 | 300 | 225 | 200 |
| Cast Iron | 950 | 870 | 750 | 625 | 525 | 450 | 360 |
| Brass | 1150 | 1000 | 900 | 750 | 650 | 540 | 450 |
| Capacity | Net
Weight ( Kgs.) | | 3-10mm | 2.20 |
| 6-16mm | 4.00 | | 
