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.
Center hole cylinders operate at a maximum working pressure of 10,000 PSI and are designed for use with compatible high-pressure hydraulic systems.
Yes. Anchor bolt testing is often performed on existing structures during inspections and retrofit projects.
Center hole cylinders allow precise tensile force to be applied directly along the bolt axis, ensuring accurate preload without inducing bending or misalignment.
Testing equipment is specialized and requires calibration, making rentals more practical for many contractors.
