The SR Series Spring Return Bolt Tensioner delivers fast and precise bolt tensioning in industrial applications. Operating at a maximum pressure of 21,750 psi, it features a single-stage, spring-return piston with a 10mm stroke. Key safety features include piston overstroke prevention and stroke indication, while its quick-release bridge adaptation facilitates easy setup and removal. Ideal for heavy-duty applications in power, oil & gas, and manufacturing.
| Load Cell | Bolt Size | Tool Load (lbs) | Effect Area (IN2) | Maximum Stroke (mm) | Cylinder Retract | Maximum Working Pressure (PSI) | Weight (lbs) | A (IN) | B (IN) | C (IN) | D (IN) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SR1 | 1″-1.1/8″ | 61,730 | 2.89 | 10 | Auto Retract | 21,750 | 8.2 | 3.3 | 4.6-4.7 | 2.7-3.0 | 5.6-5.7 |
| SR2 | 1″-1.3/8″ | 99,210 | 4.65 | 10 | Auto Retract | 21,750 | 12.1 | 4.1 | 4.6-4.9 | 3.0-3.5 | 6.6-5.9 |
| SR3 | 1.1/4″-1.5/8″ | 145,500 | 6.82 | 10 | Auto Retract | 21,750 | 16.5 | 4.6 | 4.8-5.1 | 3.6-4.1 | 5.9-6.3 |
| SR4 | 1.1/2″-1.7/8″ | 220,460 | 10.34 | 10 | Auto Retract | 21,750 | 25.4 | 5.5 | 5.2-5.7 | 4.4-5.0 | 6.4-6.9 |
| SR5 | 2″-2.3/4″ | 330,690 | 15.50 | 10 | Auto Retract | 21,750 | 40.8 | 6.9 | 5.8-6.6 | 5.3-6.5 | 7.4-8.1 |
| SR6 | 2.3/4″-3.1/2″ | 551,150 | 25.84 | 10 | Auto Retract | 21,750 | 72.8 | 8.6 | 6.6-7.3 | 6.8-8.1 | 8.5-9.3 |
| SR7 | 3.1/2″-4″ | 705,470 | 33.07 | 10 | Auto Retract | 21,750 | 103.6 | 9.9 | 7.3-7.8 | 9.1-9.5 | 9.5-10.0 |
| SR8 | 4″-4.1/2″ | 903,880 | 42.37 | 10 | Auto Retract | 21,750 | 140 | 11.1 | 7.8-8.3 | 10.0-10.6 | 10.4-10.9 |
