CAM SHAFT ASLY.
This part is manufactured with 20crMo materials. And it is fully carbureted, making the deepness reach at 0.5-0.8 and the hardness for the surface reach at 58-62HRC after heat treatment while the hardness for the depth reach at 38-45HRC. Besides, its working face has been deeply plated with hard chromium (0.03-0.05) with vickers hardness>800-1000 and melting point>1800c, making the valve rocker noise low and resistance to adhesion abrasion strong.