Custom CNC Turning Stainless Steel Flange Piston

This custom stainless steel piston is manufactured by precision CNC turning process. It is an integrated rotary symmetrical part, consisting of a front mounting flange with fixing threaded holes, inner stepped bore and multiple parallel annular sealing grooves on the outer cylindrical surface. The multi-groove structure is designed to install sealing rings, which can achieve reliable sealing in hydraulic and pneumatic systems.
During production, we strictly control the outer diameter tolerance, surface roughness of the cylinder surface, perpendicularity of the flange face, concentricity between the inner hole and outer circle, and the width & depth of each sealing groove. All turning features are finished in one clamping, so the runout is well controlled. Smooth cylinder surface reduces friction and wear during reciprocating motion, extending the service life of sealing elements.
We support multiple stainless steel grades including 303, 304 and 316L for selection. Available surface treatments include passivation, bright polishing, hard plating and sandblasting. Stainless steel material provides excellent corrosion resistance, high compressive strength and good wear resistance, suitable for working environments with hydraulic oil, water, weak corrosive media.
This flanged piston component is widely used in hydraulic cylinders, pneumatic actuators, hydraulic valves, fluid power equipment, test benches and industrial automation power units. It is the core moving part that converts pressure energy into mechanical linear motion.