Air Compressor Piston Assembly

The air compressor piston assembly shown here is a precision CNC-machined aluminum component produced from 356-T6 or A356-T6 aluminum alloy in compliance with QQ-A-601 or ASTM B108. It provides excellent strength, thermal stability, and corrosion resistance. With an external diameter of 3.6 inches, an internal cavity diameter of 3.13 inches, and a height of 3.5 inches, this air compressor piston assembly ensures outstanding dimensional accuracy and a refined surface finish, making it ideal for high-performance mechanical systems and compressor applications.

Each air compressor piston assembly is manufactured from certified aluminum ingots and undergoes hard anodizing per MIL-A-B625 Type III, followed by polishing to a bright luster. The hard anodized coating provides superior wear and corrosion resistance, while the final polish enhances appearance and surface smoothness. The surface roughness is maintained between Ra 16 – 30 microinch, and the machining precision is controlled within ±0.005 inch, guaranteeing consistency and interchangeability between components.

This air compressor piston assembly features a cup-like cylindrical geometry with a central through-hole at the base, inner and outer step structures, and precise corner radii .03 ± .03 in and fillet radii .06 ± .03 in. A 2° maximum draft angle ensures optimal machinability and coating uniformity. The angular tolerance of ±0°30' and precise contouring deliver a perfect fit for demanding piston systems and high-pressure environments.

Manufactured by Jingbohui (Xiamen) Mechanical Technology Co., Ltd., this air compressor piston assembly is widely used in compressor housings, pump pistons, pneumatic actuators, and precision machinery components. The company provides full customization services, including material selection, dimensional verification, anodizing color options, sample confirmation, and inspection reporting. With ISO 9001 certification and over 10 years of CNC machining experience, Jingbohui ensures reliable quality, fast turnaround, and professional OEM/ODM solutions for global clients.