| SPECIFICATIONS | ||||||
| Model | SIGMA-1 | SIGMA-2 | SIGMA-4 | SIGMA-40 | SIGMA-6 | |
| Stroke | 4.00in. (101.6mm) | 6.00in. (152.4mm) | 8.00in. (203.2mm) | 3.00in. (76.2mm) | 12.00in. (304.8mm) | |
| Gripping force @ 100 psi (6.8 bar) |
Closing | 136.7lbs. (62.1kgf) | 223.0lbs. (101.4kgf) | 503.5lbs. (228.9kgf) | 58.2lbs. (26.4kgf) | 773.1lbs. (351.4kgf) |
| Opening | 216.5lbs. (98.4kgf) | 311.7lbs. (141.7kgf) | 636.2lbs. (289.2kgf) | 97.9lbs.(44.5kgf) | 1130.9lbs. (514.0kgf) | |
| Approximate weight | 18.2lbs. (8.3kgf) | 29lbs. (13kg) | 62lbs. (28kg) | 6.5lbs. (2.9kg) | 130lbs. (59kg) | |
| Operating displacement | 9.6in.3 (157.7cm3) | 20.86in.3 (341.9cm3) | 56.5in.3 (926.8cm3) | 3.276in3 (53.7cm3) | 20.86in.3 (341.9cm3) | |
| Maximum operating pressure | 250psi (17.0bar) | 250psi (17.0bar) | 250psi (17.0bar) | 250psi (17.0bar) | 250psi (17.0bar) | |