Hydraulic Spool Valve Sleeves

Precision-ground spool sleeves for hydraulic directional valves, machined in one setup to keep ovality inside 3 microns and concentricity inside 5. Every batch is air-gauged before dispatch; the chart ships with the parts, not after you ask.

Process

• CNC turning on single-setup bar feeders
• Cylindrical grinding, honing on request
• Hard chrome or nitriding per drawing

Used inside spool valves for HydraPac Systems and Karnel Pumps across three pump platforms for two years without a dimensional return.