Enerpac hollow-plunger hydraulic sets combine hollow-center hydraulic cylinders with matched pumps and accessories for pushing, pulling, tensioning, testing, positioning, and maintenance applications. The open-center cylinder design allows rods, cables, bolts, or other components to pass through the cylinder for specialized industrial work.
Hollow-Plunger Cylinder and Pump Sets
Hollow-plunger cylinders provide both high hydraulic force and through-hole access. This makes them especially useful for applications where force must be applied around a threaded rod, cable, shaft, bolt, or structural member.
Common applications include:
- Bolt tensioning and removal
- Pulling and pushing operations
- Pressing and positioning
- Testing and calibration setups
- Maintenance and repair
- Construction and structural work
Choosing an Enerpac Hollow-Plunger Hydraulic Set
When selecting a hollow-plunger set, compare load capacity, cylinder stroke, center-hole diameter, pump type, operating method, and available installation space. The center opening must be large enough for the rod, cable, bolt, or workpiece passing through the cylinder.
Also confirm that all system components are rated for the required load and hydraulic pressure.
For conventional lifting and maintenance work, see Enerpac general-purpose hydraulic sets. For applications with extremely limited vertical clearance, browse Enerpac low-height hydraulic sets.
You can also browse the full Enerpac Porta Power collection for additional hydraulic cylinder and pump combinations.
Frequently Asked Questions
What is a hollow-plunger hydraulic cylinder?
A hollow-plunger cylinder has an open center that allows a rod, cable, bolt, or other component to pass through the cylinder while hydraulic force is applied.
What are hollow-plunger hydraulic sets used for?
They are commonly used for pulling, pushing, tensioning, testing, pressing, and maintenance applications where access through the center of the cylinder is required.
How do I select the right hollow-plunger set?
Compare load capacity, stroke, center-hole diameter, pump type, and available working space. The center opening must accommodate the component passing through the cylinder while the system remains properly rated for the required force.
