The user must specify the Clamp Size. IMS then uses a lookup table (see below) to determine the (default) Stud Size, (default) Wrench Size, and the Torque values.
Grayloc Torque:
Clamp Size (dec.) | Stud Size (dec.) | Stud Grade | Wrench Size (dec.) | 50% Torque (ft.lbs.) | 100% Torque (ft.lbs.) | 100% Torque (ft.lbs.) | 200% Torque (ft.lbs.) |
|---|---|---|---|---|---|---|---|
1 | 1.5 | 13NC-2 | 0.875 | 9 | 17 | 26 | 34 |
1.5 | 0.625 | 11NC-2 | 1.0625 | 16 | 35 | 53 | 70 |
2 | 0.75 | 10NC-2 | 1.25 | 28 | 55 | 83 | 110 |
2.5 | 0.75 | 10NC-2 | 1.25 | 28 | 55 | 83 | 110 |
3 | 0.75 | 10NC-2 | 1.25 | 28 | 55 | 83 | 110 |
4 | 0.875 | 9NC-2 | 1.4375 | 45 | 90 | 135 | 180 |
5 | 1 | 8NC-2 | 1.625 | 70 | 140 | 210 | 280 |
6 | 1.125 | 8N-2 | 1.8125 | 103 | 205 | 308 | 410 |
8 | 1.25 | 8N-2 | 2 | 145 | 290 | 435 | 580 |
10 | 1.625 | 8N-2 | 2.5625 | 315 | 630 | 945 | 1260 |
12 | 1.75 | 8N-2 | 2.75 | 435 | 870 | 1305 | 1740 |
14 | 2 | 8N-2 | 3.125 | 1250 | 1300 | 1950 | 2600 |
16 | 2.5 | 8N-2 | 3.875 | 1285 | 2570 | 3855 | 5140 |
18 | 2.5 | 8N-2 | 3.875 | 1285 | 2570 | 3855 | 5140 |
20 | 2.5 | 8N-2 | 3.875 | 1285 | 2570 | 3855 | 5140 |