Strengthen Bolt Tensioning Efficiency with Hydraulic Nuts
HYDRAULIC NUTS
Hydraulic nuts simplify the tensioning of large-diameter bolts with high and precise preloads. A hydraulic pump activates the jacking system, reducing the effort to pump operation. No nut rotation minimizes space requirements and eliminates torsional stress on threads. Multiple nuts can be linked for simultaneous operation, ensuring uniform preload across all bolts.
Features
- Bottom collar, top collar, and shim types available
- Standard designs at 1500 bar and 2500 bar
- A20/A15 range
- Replaces original nut, combining tensioner and permanent nut
- All-in-one solution, nut remains post-tensioning
- Special designs for specific needs
- Supplied up to M400 (larger sizes on request)
- High-temperature options available
Advantages
- Quick installation
- Hydraulic development ensures an even and accurate load
- Low initial load loss (shim)
- Eliminates torque and torsion stress
- No need for hammers or spanners
- Self-aligning (shim)
- Enhanced fatigue performance
- 100% simultaneous tensioning
- Compact, cost-effective, and long-lasting jack design
- Requires less stud protrusion than tensioners
Testing & Certification
LRQA has certified our tools for our commitment to quality and environmental standards, granting them the ISO 9001: 2015 certification. Before shipping, each tool undergoes a rigorous assembly, oil filling, and pressure testing process to ensure optimal performance.