Enerpac cst4251 Hydraulic Cylinder 980 Lbf 5000 Psi

Product Description

The ENERPAC cst4251 is a standard threaded-body hydraulic cylinder designed for industrial fixturing applications. It installs into a threaded bore and is secured with standard flange nuts, making it well-suited for support, clamping, and workpiece ejection tasks. The cylinder delivers 980 lbf of push capacity at a rated operating pressure of 5000 psi, with a stroke length of 31/32 inches. Its compact form factor allows multiple units to be positioned close together, enabling clamping or support across long workpieces or in space-constrained high-pressure setups. Hydraulic technicians and fixture engineers are the primary installers in manufacturing and fabrication environments.

The cst4251 is used in production fixturing, machining setups, and assembly line clamping applications where precise, repeatable force is required. The threaded body design integrates directly into custom fixtures and tooling plates, eliminating the need for external mounting brackets. It is particularly effective in applications that demand multiple cylinders operating in close proximity along a workpiece, such as in press tooling or multi-point clamping fixtures. Its 3/4 inches-16 UNF thread makes it compatible with standard threaded bore fixtures machined to that specification.

Key Features

• 980 lbf push capacity at 5000 psi rated pressure
• 31/32 inch stroke length for compact actuation
• 3/4 inches-16 UNF threaded body for direct fixture integration
• Secured with standard flange nuts — no specialty hardware required
• Compact design allows close-spacing for multi-point clamping
• Suitable for support, clamping, and workpiece ejection tasks

Compatibility

Designed for installation in threaded-bore fixtures machined to accept a 3/4 inches-16 UNF threaded body hydraulic cylinder. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation is performed by hydraulic system technicians or fixture engineers. Before servicing or installing this cylinder, depressurize the hydraulic circuit completely and verify system pressure is at zero. Thread the cylinder body into the prepared bore and secure with standard flange nuts to the appropriate engagement depth. Do not exceed the rated system pressure of 5000 psi, and ensure all hydraulic fittings and lines are rated for the operating pressure before pressurizing the circuit.

Technical Specifications

• Push Capacity: 980 lbf at 5000 psi
• Operating Pressure: 5000 psi
• Stroke Length: 31/32 inches
• Thread Size: 3/4 inches-16 UNF
• Weight: 0.55 pounds

Standard Information

• Brand: ENERPAC
• Manufacturer Part Number: cst4251