The SWC universal coupling is a type of universal joint that is designed for high-torque applications. It has a reasonable configuration and safety in use. Adopting a whole fork avoids the weakness of the compaction to the axletree seat from the bolt, and completely avoids the usual destruction from the bolt being loose and broken. The life of it is longer than others. The SWC universal couplings are mainly used in rolling mills, hoisting, and other heavy machinery.