Stainless Steel Precision Turned Sleeve and End Cap Assembly

As a critical protection and sealing unit in mechanical transmission or fluid connection systems, this assembly consists of a cylindrical sleeve and a matching end cap. The sleeve features a rotational body design with a uniform brushed metal finish, typically used to house precision bearings, spring mechanisms, or serve as a shielding housing for sensor probes. The end cap ensures closure via interference fit or threaded connection, protecting internal components from external contaminants such as dust and oil. It is widely used in automated production lines, medical devices, and precision instruments where cleanliness is paramount.

The core of manufacturing these parts lies in strictly controlling the coaxiality of the inner and outer circles and ensuring the flatness of the mating surfaces. The surface finish of the sleeve's bore directly affects the smooth operation of internal moving parts, while the outer diameter tolerance must meet precision fit standards such as H7/g6 to prevent assembly looseness or jamming. Another key processing focus is the consistency of the end cap's edge chamfers and thickness, ensuring uniform force distribution during screwing or pressing to avoid deformation or seal failure due to stress concentration. To address the material adhesion characteristics of stainless steel, cutting parameters are optimized to ensure a burr-free surface without tool marks.

Ningbo Zhixiu Import & Export Co., Ltd. leverages a cluster of high-precision CNC lathes from Taikan and Huashuo brands to efficiently complete the precision turning of such rotational parts. The factory is equipped with professional inspection devices, including profile projectors and roughness profilometers, to strictly verify the sleeve's inner/outer diameter runout and the end cap's flatness, ensuring dimensional stability for batch deliveries. We support non-standard customization based on customer-provided 2D/3D drawings. Materials include 304/316 stainless steel, aluminum alloy, or carbon steel, with optional surface treatments such as passivation and sandblasting to meet specific corrosion resistance and aesthetic requirements.