Roller Body:Adopting the good hardenability 40 Mn2 steel through forging.The Heat treatment of tempering and medium-frequency induction surface hardening assure it’s strength and wear resistance.
Axle:Adopting 45# steel ,tempering and medium-frequency induction surface hardening.The surface HRC is 52-60, depth of hardening is 3-6mm,comprehensive is good.
Floating seal:Adopting cr-al alloy,HRC 65-72,the roughness of working surface 0.1μM-0.2μM
O-ring:Adopting the raw material of butadiene-acrylonitrile rubber which is the copolymerization of butane and acrylonitrile into produce.That has better oil resistance and high-temperature resistance.

股份和发过火