Break hub production process

Precision Engineering for Global Heavy-Duty Applications
Our latest production video showcases the complete manufacturing process of high-performance trailer brake drums, demonstrating our commitment to quality, durability, and OEM/OEM replacement standards.

1. Key Production Stages (Video Highlights)

A. Raw Material Selection

• High-grade cast iron (GG20/GG25) or ductile iron (QT450-10/500-7)

• Spectrometer-verified chemical composition for optimal heat dissipation

B. Casting Process

• Automated sand casting or centrifugal casting (depending on drum type)

• Temperature-controlled pouring at 1,350-1,450°C

• Real-time X-ray inspection for internal defects

C. Machining Precision

• CNC lathe machining with ≤0.05mm tolerance

• Inner diameter finishing: 420mm/16.5″ (standard), up to 600mm/23.6″ (custom)

• Balanced grinding surface finish (Ra 3.2μm max)

D. Heat Treatment

• Induction hardening (HRC 45-50) on friction surfaces

• Stress-relief annealing to prevent warping

E. Quality Control

• 100% dimensional inspection with CMM

• Dynamic balance testing (≤15g·cm imbalance)

• Salt spray test (72+ hours to ASTM B117)