The Enerpac CST9381 is a single-acting, spring-return threaded body cylinder from the CST series, rated 1,950 lb at 5,000 psi with a 1.52 in stroke. Its 1.000-12 UNF 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 (.250-28 UNF) 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 0.39 in² and a full stroke uses 0.58 in³ of oil. The CST9381 is 4.11 in long retracted and 5.63 in extended and weighs 1.0 lb. Workholding circuits often run below 5,000 psi; at 2,000 psi this cylinder gives about 780 lb of force and at 3,000 psi about 1,170 lb.
How it compares
Other CST cylinders with the same 1.000-12 UNF body: CST971 (0.28 in stroke), CST9131 (0.52 in stroke), CST9191 (0.76 in stroke), CST9251 (1.04 in stroke).
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 1.000-12 UNF thread are sold separately.
Related models
| Model | Force | Stroke | Body thread |
|---|---|---|---|
| CST971 | 1,950 lb | 0.28 in | 1.000-12 UNF |
| CST9131 | 1,950 lb | 0.52 in | 1.000-12 UNF |
| CST9191 | 1,950 lb | 0.76 in | 1.000-12 UNF |
| CST9251 | 1,950 lb | 1.04 in | 1.000-12 UNF |
| CST18131 | 3,950 lb | 0.51 in | 1.313-16 UN |
| CST18251 | 3,950 lb | 0.98 in | 1.313-16 UN |
Specifications
| Product Family | Hydraulic Workholding Cylinders |
|---|---|
| Series | CST |
| Cylinder Type | Threaded Body Hydraulic Cylinders |
| Stroke | 1.52 in |
| Push Force | 1,950 lb |
| Cylinder Stroke | 1.52 in |
| Maximum Operating Pressure | 5,000 psi |
| Cylinder Action | Single Acting |
| Return Type | Spring Return |
| Capacity Range | Up to 5 Ton |
| Collapsed Height | 4.11 in |
| Weight | 1.0 lb |