CLL70-50 Double acting hollow lock nut hydraulic jack is designed for heavy-duty lifting, tensioning, pushing, and load holding applications. With a hollow piston structure, it allows rods, cables, bolts, or tendons to pass through the center, making it ideal for prestressing, bridge construction, structural maintenance, foundation engineering, and industrial equipment positioning.
The double-acting hydraulic design provides faster piston extension and retraction, improving working efficiency compared with single-acting models. The integrated mechanical lock nut ensures safe load holding for extended periods, even when hydraulic pressure is released.
Application of CLL70-50 Double acting hollow lock nut jack:
Prestressed Concrete & Post-Tensioning
Tensioning of steel strands/tendons in bridges, buildings, and infrastructure
Anchor bolt and threaded bar preloading and locking
Bridge & Civil Engineering
Bridge bearing replacement and adjustment
Jacking and alignment of bridge girders and precast components
Temporary support and load testing
Industrial Maintenance & Installation
Lifting and positioning of heavy machinery, turbines, and vessels
Press-fit disassembly (bearings, sleeves, shafts) using the pull function
General Heavy-Duty Lifting
Precision jacking in confined spaces (low-profile, compact design)
Temporary load support in construction and mining
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