Universal Joint
The cross shaft of universal joint is made of 20Cr material, the journal surface is carburized and quenched. The depth of the carburized layer is 0.8~1.2mm, the surface hardness is 58~64HRC, the hardness of journal end face is not lower than 55HRC, and the needle bearing material is generally High-quality GCrl5, the service life can reach more than 3 years.
