Name: wheel hub unit
1） Hardness： Metal material has the ability to resist hard objects sag surface. Industry technical requirements standard:60HRC—65HRC
2）In the circular degree precision condition, rolling ball in order, clearance in order, difficult to wear and can enhance lifespan
circular degree ：< 2.5um
3） Use world famous brand grease, which with good lubricating performance , to enhance product performance。Brand：SHELL,KOYO,MOBIL
4） Learn from world famous hardening treatment experience, such as BCA, TIMKENM ，reaching the standard of OE quality
5）Precise riveting surface to pursue solid riveting，introduce advanced riveting machine and adopt the strict riveting standard；Strict riveting progress control, prevent crack and improve security.