The Enerpac CST2131 is a single-acting, spring-return threaded body cylinder from the CST series, rated 380 lb at 5,000 psi with a 0.52 in stroke. Its .500-20 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 (#6-32 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 0.08 in² and a full stroke uses 0.04 in³ of oil. The CST2131 is 2.03 in long retracted and 2.55 in extended and weighs 0.3 lb. Workholding circuits often run below 5,000 psi; at 2,000 psi this cylinder gives about 160 lb of force and at 3,000 psi about 240 lb.
How it compares
Other CST cylinders with the same .500-20 UNF body: CST271 (0.24 in stroke), CST2101 (0.36 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 .500-20 UNF thread are sold separately.
Related models
| Model | Force | Stroke | Body thread |
|---|---|---|---|
| CST271 | 380 lb | 0.24 in | .500-20 UNF |
| CST2101 | 380 lb | 0.36 in | .500-20 UNF |
| CST471 | 980 lb | 0.27 in | .750-16 UNF |
| CST4131 | 980 lb | 0.50 in | .750-16 UNF |
Specifications
| Product Family | Hydraulic Workholding Cylinders |
|---|---|
| Series | CST |
| Cylinder Type | Threaded Body Hydraulic Cylinders |
| Stroke | 0.52 in |
| Push Force | 380 lb |
| Cylinder Stroke | 0.52 in |
| Maximum Operating Pressure | 5,000 psi |
| Cylinder Action | Single Acting |
| Return Type | Single-Acting, Spring Return |
| Collapsed Height | 2.03 in |
| Weight | 0.3 lb |