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Enerpac | 63.6 ton Capacity, 3.00 in Stroke, Single-Acting, Hollow Plunger Hydraulic Cylinder | RCH603

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Description & Features

Designed for testing, maintenance, and tensioning work, this 63.6-ton capacity hollow plunger cylinder supports both push and pull force applications by allowing a threaded rod to pass through its center bore. With a 3.00 in (76 mm) stroke and a 4.88 in (123.9 mm) cylinder bore diameter, it operates at up to 10,000 psi (700 bar) and weighs 62 lbs (28.1 kg).

The Enerpac RCH-603 features a nickel-plated floating center tube, standard on models over 20 tons, which reduces side load damage and extends service life. A baked enamel finish provides corrosion resistance, while base holes and collar threads simplify fixturing. Single-acting with spring return, this cylinder includes a CR400 coupler and is part of the RCH Series of hollow plunger cylinders suited to industrial tensioning and load positioning tasks.

SKU: RCH-603

Supplier Part Number (MPN): RCH603

Specifications

Brand
Enerpac
Pack Size
1.00
UOM
EA
Cylinder Bore Diameter
4.88 in (123.9 mm)
Max Operating Pressure
10,000 psi (700 bar)
Product Type
HydraulicCylinders
Series
RCH
Stroke
3 in (76 mm)
Subtype
Hollow Plunger Cylinder
Weight
62 lbs (28.1 kg)
Supplier Part Number
RCH603
Product Weight
68.90 lbs

Related Documents

Product Questions & Answers (2)

Question by: Hugh B on Dec 26, 2025, 3:15 PM
got a bolt tensioning job coming up and this is my first time using a hollow plunger setup, what exactly makes it work for both push and pull instead of just one direction?
Answer by: Customer Support on Dec 27, 2025, 7:30 PM
The hollow bore running through the center of the cylinder is what opens up both options. You thread a steel rod through that bore and attach it to whatever load you're working with. When the cylinder extends, it pushes. When the rod is fixed to the load and the cylinder retracts, it pulls. That center hole is the whole point of the RCH design, and it's what makes bolt tensioning and similar jobs possible with a single tool.
Question by: Howard P on May 23, 2026, 8:02 AM
got a job where i need to pull on a threaded rod, not just push. will this hollow plunger cylinder handle that?
Answer by: Customer Support on May 25, 2026, 7:41 AM
With the hollow plunger design, you can run a threaded steel rod through the center bore and attach it to your load, so the cylinder can apply either pull force or push force. It is a single acting, spring return cylinder, which fits well for tensioning, maintenance, and testing setups where you need that pull capability.