1.All parts are heat treatment(quenching and tempering) and controlled in a reasonable tolerance range.

2.Tensile strength:15-20% higher than the standard

3.Certificate of Quality: ISO 9001:2000,SGS,BV

4.Centreless grinding.

5.Good lubrication with excellent grease.

6.All kinds of surface color and treatments.

Products are made of high quality alloy steel production. The plates are punched and squeezed bores by precision technology. The pin, bush, roller are machined by high-efficiency automatic equipment and automatic grinding equipment, then through heat treatment of carburization, carbon and nitrogen protection mesh belt furnace, surface blasting process etc. Assembled precision by Internal hole position, spin riveted by pressure to ensure the performance of the entire chain.

Specifications