CST40501 Enerpac Single-Acting Threaded Body Cylinder, 8,800 lb, 2.03 in Stroke

The Enerpac CST40501 is a single-acting, spring-return threaded body cylinder from the CST series, rated 8,800 lb at 5,000 psi with a 2.03 in stroke. Its 1.875-16 UN body thread lets you screw it straight into a fixture or bracket and set the plunger height exactly, which makes it a compact choice for positioning, holding and ejecting parts where space is tight.

Features

• Threaded body for exact positioning and easy installation
• Center-tapped plunger (.500-13 UNC) holds contact buttons and other attachments
• Spring return keeps tubing simple: one hydraulic line per cylinder
• SAE #4 oil port
• Buna-N and polyurethane seals

Sizing

Effective area is 1.76 in² and a full stroke uses 3.46 in³ of oil. The CST40501 is 5.41 in long retracted and 7.44 in extended and weighs 3.9 lb. Workholding circuits often run below 5,000 psi; at 2,000 psi this cylinder gives about 3,520 lb of force and at 3,000 psi about 5,280 lb.

How it compares

Other CST cylinders with the same 1.875-16 UN body: CST40131 (0.58 in stroke), CST40251 (1.05 in stroke), CST40381 (1.56 in stroke).

If you need powered retraction or high cycle rates, the double-acting CDT series covers the same force class (for example CDT40131).

Before you order: The return spring needs at least 580 psi to overcome, so set your circuit above that; use a 3-way valve or a single-acting workholding circuit; mounting flanges and flange nuts for the 1.875-16 UN thread are sold separately.

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