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Enerpac RACL-Series, Aluminum Lock Nut Cylinders

Enerpac RACL-Series lock nut cylinders are single-acting, aluminum-body high-tonnage rams rated to 10,000 PSI, built with a threaded lock nut collar that mechanically holds the load once the cylinder is extended — so you can release hydraulic pressure and keep the position locked. The aluminum construction cuts weight versus a steel-body cylinder of the same capacity, which matters on jobs where the ram is repositioned by hand. Matching one means confirming bore, stroke, and tonnage against the load you need to hold; if you have a discontinued lock nut cylinder to replace, send your specs for a cross-reference.

Can’t find the exact part? Send the part number or specs — we’ll quote it.

Call (800) 823-4937

How to Choose an Enerpac RACL-Series Lock Nut Cylinder

Bore — Sets the effective piston area and therefore the tonnage at a given pressure. Size the bore so the rated capacity exceeds your peak load with margin.
Stroke (retracted / extended) — The travel from collapsed to fully extended height. Confirm both the retracted height fits your work envelope and the extended stroke reaches the load.
Pin / mount size — The base and saddle interface that ties the cylinder into your fixture or press. Match it to your existing tooling so the ram seats and centers correctly.
Rod diameter — Drives the column strength of the extended ram. A larger rod resists side load and buckling when the cylinder runs near full stroke.
Port (SAE / NPT) — The hydraulic connection thread. Verify it against your hose end or coupler so you do not need an adapter.
Action — RACL cylinders are single-acting; the ram advances on hydraulic pressure and the lock nut holds the load mechanically. Confirm the return method (typically spring or load return) suits your cycle.
Working PSI — Rated to 10,000 PSI (700 bar). Pair the cylinder with a pump and hose rated to the same pressure class.

Which Enerpac Cylinder Is Right for the Job?

The RACL-Series earns its place when you need to hold a load for hours or days without keeping a pump under pressure — the aluminum body keeps it light enough to reposition by hand. If you want the same mechanical lock in a steel body for heavier, fixed installations, compare the Enerpac HCL-Series, Lock Nut Cylinders. For straight lift-and-lower work where mechanical holding is not required, the Enerpac RC-Series Single Acting Cylinders, 10000 PSI are the general-purpose choice. When the application is a high-force press or pulling job, step up to the Enerpac HCG-Series, High-Tonnage Cylinders or the Enerpac HCR-Series, High-Tonnage Cylinders. Browse the full lineup under Enerpac High Pressure 10,000 PSI Cylinders.

Complete the System

A RACL cylinder is the actuator — it needs the rest of the circuit to run. Drive it with a 10,000 PSI hydraulic pump, hand or powered, sized to the cylinder volume for the cycle speed you want. Route pressure through high-pressure hydraulic hoses rated to the same class, and connect them with matching hydraulic fittings and quick couplers so ports seal without adapters. Add hydraulic valves to control advance, hold, and retract when you are running more than one cylinder or need metered flow.

Cross-Referencing an Obsolete Lock Nut Cylinder

If your RACL part number is discontinued or you are replacing a competitor's aluminum lock nut cylinder, the equivalent is what gets your job running — the same bore, stroke, tonnage, and lock function in a current-production unit. We have cross-referenced Enerpac cylinders since 1963, and we can match a legacy ram by its physical specs even when the original catalog number is gone. Give us the bore, stroke, mount, and rated capacity off the old cylinder and we will confirm the replacement before you order. Request a cross-reference.

Enerpac RACL-Series, Aluminum Lock Nut Cylinders – Frequently Asked Questions

How do I measure for the right RACL-Series cylinder?

Work from three numbers: the load you need to hold (to set tonnage and bore), the travel from your work surface to the load (to set stroke), and the retracted height you have room for. Then confirm the mount and port match your existing pump and tooling so the ram seats and connects without adapters.

What pressure are Enerpac RACL-Series cylinders rated to?

RACL-Series cylinders are part of the Enerpac high-pressure line and are rated to 10,000 PSI (700 bar). Run them on a pump, hose, and fittings rated to the same 10,000 PSI class so every part of the circuit shares the rating.

What does the lock nut on a RACL cylinder do?

The threaded lock nut collar lets you mechanically hold the load after the cylinder is extended. Once the nut is run down, you can release hydraulic pressure and the cylinder holds position on the nut — useful for sustained loads where you do not want a pump under pressure for hours or days.

What's the difference between the RACL-Series and the HCL-Series lock nut cylinders?

Both use a mechanical lock nut to hold the load. The RACL-Series has an aluminum body that cuts weight for cylinders that get repositioned by hand, while the steel-body Enerpac HCL-Series, Lock Nut Cylinders suit heavier fixed installations. Match the body to how often the ram is moved and how it is mounted.

Which Enerpac cylinder do I need if I do not require a mechanical lock?

For straight lifting and lowering without holding a sustained load mechanically, the Enerpac RC-Series Single Acting Cylinders, 10000 PSI are the general-purpose choice. Choose a RACL or lock nut cylinder only when you need to hold the load with pressure released.

Are RACL-Series cylinders single-acting or double-acting?

RACL-Series cylinders are single-acting: the ram advances under hydraulic pressure and returns by spring or load, depending on the model. Confirm the return method on the specific part number so it matches your cycle and orientation.

What pump and hose do I need to run a RACL cylinder?

You need a 10,000 PSI hydraulic pump sized to the cylinder volume, high-pressure hydraulic hoses rated to the same class, and matching hydraulic fittings and couplers. Add hydraulic valves when you control multiple cylinders or need metered flow.

Can you cross-reference a discontinued or obsolete RACL lock nut cylinder?

Yes. Give us the bore, stroke, mount, port, and rated capacity off the old cylinder and we will match a current-production equivalent with the same lock function, even when the original catalog number is gone. Request a quote.

Enerpac RACL-Series, Aluminum Lock Nut Cylinders

Enerpac RACL-508 Aluminum Lock Nut Cylinder

Enerpac RACL-3010 Aluminum Lock Nut Cylinder

Enerpac RACL-202 Aluminum Lock Nut Cylinder

Enerpac RACL-1506 Aluminum Lock Nut Cylinder

Enerpac RACL-1504 Aluminum Lock Nut Cylinder

Enerpac RACL-15010 Aluminum Lock Nut Cylinder

Enerpac RACL-502 Aluminum Lock Nut Cylinder

Enerpac RACL-1502 Aluminum Lock Nut Cylinder

Enerpac RACL-504 Aluminum Lock Nut Cylinder

Enerpac RACL-308 Aluminum Lock Nut Cylinder

Enerpac RACL-2010 Aluminum Lock Nut Cylinder

Enerpac RACL-206 Aluminum Lock Nut Cylinder

Enerpac RACL-1508 Aluminum Lock Nut Cylinder

Enerpac RACL-1008 Aluminum Lock Nut Cylinder

Enerpac RACL-1002 Aluminum Lock Nut Cylinder

Enerpac RACL-306 Aluminum Lock Nut Cylinder

Enerpac RACL-304 Aluminum Lock Nut Cylinder

Enerpac RACL-208 Aluminum Lock Nut Cylinder

Enerpac RACL-1004 Aluminum Lock Nut Cylinder

Enerpac RACL-5010 Aluminum Lock Nut Cylinder

Enerpac RACL-506 Aluminum Lock Nut Cylinder

Enerpac RACL-204 Aluminum Lock Nut Cylinder

Enerpac RACL-10010 Aluminum Lock Nut Cylinder

Enerpac RACL-1006 Aluminum Lock Nut Cylinder

Enerpac RACL-302 Aluminum Lock Nut Cylinder

How to Choose an Enerpac RACL-Series Lock Nut Cylinder

Which Enerpac Cylinder Is Right for the Job?

Complete the System

Cross-Referencing an Obsolete Lock Nut Cylinder

Enerpac RACL-Series, Aluminum Lock Nut Cylinders – Frequently Asked Questions

Quick Buy

Enerpac RACL-Series, Aluminum Lock Nut Cylinders

Products

Enerpac RACL-508 Aluminum Lock Nut Cylinder

Enerpac RACL-3010 Aluminum Lock Nut Cylinder

Enerpac RACL-202 Aluminum Lock Nut Cylinder

Enerpac RACL-1506 Aluminum Lock Nut Cylinder

Enerpac RACL-1504 Aluminum Lock Nut Cylinder

Enerpac RACL-15010 Aluminum Lock Nut Cylinder

Enerpac RACL-502 Aluminum Lock Nut Cylinder

Enerpac RACL-1502 Aluminum Lock Nut Cylinder

Enerpac RACL-504 Aluminum Lock Nut Cylinder

Enerpac RACL-308 Aluminum Lock Nut Cylinder

Enerpac RACL-2010 Aluminum Lock Nut Cylinder

Enerpac RACL-206 Aluminum Lock Nut Cylinder

Enerpac RACL-1508 Aluminum Lock Nut Cylinder

Enerpac RACL-1008 Aluminum Lock Nut Cylinder

Enerpac RACL-1002 Aluminum Lock Nut Cylinder

Enerpac RACL-306 Aluminum Lock Nut Cylinder

Enerpac RACL-304 Aluminum Lock Nut Cylinder

Enerpac RACL-208 Aluminum Lock Nut Cylinder

Enerpac RACL-1004 Aluminum Lock Nut Cylinder

Enerpac RACL-5010 Aluminum Lock Nut Cylinder

Enerpac RACL-506 Aluminum Lock Nut Cylinder

Enerpac RACL-204 Aluminum Lock Nut Cylinder

Enerpac RACL-10010 Aluminum Lock Nut Cylinder

Enerpac RACL-1006 Aluminum Lock Nut Cylinder

Enerpac RACL-302 Aluminum Lock Nut Cylinder

How to Choose an Enerpac RACL-Series Lock Nut Cylinder

Which Enerpac Cylinder Is Right for the Job?

Complete the System

Cross-Referencing an Obsolete Lock Nut Cylinder

Enerpac RACL-Series, Aluminum Lock Nut Cylinders – Frequently Asked Questions

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