Support Non-standard Customization And Lower Maintenance Cost For Mining Machinery Sleeve Brass Bushing

Product Supplementary Description for Brass Bushings/Sleeves

Material: H62/H65 high-precision continuously extruded or forged brass bar, ensuring stable chemical composition, fine grain structure, free of inclusions and porosity.

Manufacturing Process

● Machined by CNC lathe combined with precision cam automatic lathes in one-time clamping to complete OD, ID, faces and chamfers, achieving coaxiality ≤0.01mm and cylindricity ≤0.008mm.
● For high-precision requirements, centerless grinding or internal honing processes are added to consistently achieve surface finish Ra0.4~Ra0.8.
● Critical dimensions are 100% inspected using automated optical measuring systems and CMM.

Quality Control

● Each batch of raw material is accompanied by third-party spectral analysis and mechanical property reports, traceable to the original heat number.
● SPC (Statistical Process Control) is implemented throughout production with key characteristic CpK ≥1.67.
● Pre-shipment batch testing includes salt spray test (NSS 48–96 hours per customer requirement), hydrogen embrittlement test, and torque/pressing force verification.

We specialize in supplying high-reliability precision brass bushings to industrial automation, automotive components, construction machinery, rail transit, and hydraulic/pneumatic sectors. Batch capability ranges from 5,000 to 200,000 pieces with stable lead times and support for Kanban/JIT delivery.

Material certificates, dimensional reports and samples are available upon request for validation.