RCH-Series Hollow Plunger Cylinders offer versatility in testing, maintenance, and tensioning applications. The hollow plunger design allows for push, pull or lifting applications.
Enerpac cylinders are built to withstand tough conditions and demanding applications. These RCH cylinders have a baked enamel finish to resist corrosion. The center hole design has base holes and collar threads for easy fixturing. For models over 20 tons, the RCH series has nickel-plated floating center tube to reduce side load damage and increase the product life.
Collapsed Height 7.03″
Extended Height 9.53″
Outside Diameter 4.5″
Cylinder Bore Diameter 3.5″
Plunger Diameter 2.5″
Base to Advance Port 0.85″
Saddle Diameter 2.5″
Saddle Protrusion from Plunger 0.38″
Plunger Internal Thread 1 13/16 – 16 un
Plunger Thread Length 0.88″
Base Mounting Holes Bolt Circle 3.63″
Base Mounting Holes Thread 3/8-16 unc
Collar Thread 4 1/2″ – 12″
Collar Thread Length 1.66″
Center Hole Diameter 1.31″
Base Mounting Holes Thread Depth 0.55″
The Enerpac RCH302 hollow plunger hydraulic cylinder is a popular rental choice for contractors performing anchor bolt testing, tensioning, and pulling applications. Its center-hole design allows threaded rods, cables, and anchor bolts to pass directly through the cylinder, making it ideal for proof load testing and controlled tensioning operations. Renting provides access to specialized hydraulic equipment without the cost of ownership, calibration management, or long-term storage.
🔹 Best Suited For
Anchor bolt testing and proof load verification
Hollow plunger tensioning applications
Structural and civil engineering projects
Bridge and infrastructure maintenance
Utility and transmission tower construction
Applications requiring controlled pulling force through threaded rods or cables
🔹 Key Considerations
Requires a compatible hydraulic pump, hose, and couplers.
Hollow plunger design allows rods and cables to pass through the cylinder center.
Proper reaction fixtures are required for anchor testing applications.
🔹 Rental Insight
The RCH302 is one of the most versatile hollow plunger cylinders available in rental fleets. Its combination of compact size, substantial pulling force, and center-hole design makes it suitable for a wide range of testing, tensioning, and maintenance applications. Contractors frequently rent this cylinder as part of complete anchor bolt testing packages that include pumps, gauges, hoses, and reaction bridge assemblies.
Pull-out testing measures the resistance of an anchor to being pulled out of the concrete or base material.
Center hole cylinders are commonly used for pulling, tensioning, and detensioning applications when properly configured with threaded adapters and reaction fixtures.
Center hole cylinders typically require a compatible hydraulic pump, hoses, pressure gauge, and appropriate threaded adapters or fixtures.
It is required to confirm anchor performance, meet inspection standards, and reduce structural risk.
