The Kitagawa S1246 is a standard open-centre hydraulic cylinder designed for power chuck actuation in CNC lathes and turning centers. With a 46mm through-hole diameter and maximum speed of 7000 rpm, this cylinder is engineered for high-speed machining applications requiring reliable draw bar force transmission. The S1246 represents Kitagawa's proven cylinder technology, combining precision engineering with durable construction for long-term industrial use.

The cylinder features precision-finished piston bores and cool-running rotary unions, ensuring years of trouble-free operation. Its compact and lightweight design makes it particularly suitable for integration with Kitagawa B-200 series chucks, providing a complete workholding solution for bar feeding and chucking applications.

Key Features & Advantages

High-Speed Performance: The S1246 cylinder achieves maximum operating speeds of 7000 rpm, making it suitable for high-speed turning operations. This speed capability allows machine shops to optimize cutting parameters and reduce cycle times while maintaining reliable chuck actuation.

Balanced Force Output: Delivering 33 kN of pull force and 38 kN of push force at 4 MPa operating pressure, the S1246 provides ample actuation power for a wide range of chuck sizes. The force characteristics are specifically matched to Kitagawa B-200 series chucks, ensuring optimal gripping performance without overloading the chuck mechanism.

Precision-Finished Components: The piston bores receive precision surface finishing, reducing friction and wear during high-speed operation. Cool-running rotary unions minimize heat generation, preventing thermal distortion and maintaining consistent performance over extended operating periods.

Built-In Safety Features: The cylinder incorporates built-in check valves and relief valves, providing protection against pressure surges and ensuring safe operation. These integrated safety components eliminate the need for external valve installations, simplifying hydraulic system design.

Compatibility with Kitagawa Chucks: The S1246 is the recommended matching cylinder for Kitagawa B-206 chucks, and is also compatible with B-200 series chucks. The 46mm through-hole accommodates bar stock up to 45mm diameter when used with B-206 chucks, enabling through-spindle bar feeding operations.

Durable Construction: Constructed from high-grade materials, the S1246 withstands the demanding conditions of production machining environments. The cylinder body is designed for rigidity and vibration resistance, maintaining alignment and force transmission accuracy throughout its service life.

Technical Specifications Summary

The S1246 cylinder has a piston area of 100 cm² on the push side and 89 cm² on the pull side. Total leakage is specified at 3.0 L/min under normal operating conditions. The cylinder's moment of inertia is 0.019 kg·m², contributing to responsive acceleration and deceleration characteristics during high-speed spindle operations.

Applications

• CNC Lathes: Power chuck actuation for turning operations
• Bar Feeders: Through-hole bar feeding applications up to 46mm diameter
• Automatic Chucking Systems: Production machining with automated workpiece loading
• High-Speed Turning: Applications requiring spindle speeds up to 7000 rpm
• Retrofit Installations: Replacement cylinder for existing Kitagawa chuck systems