A universal joint, (universal coupling, U-joint, Cardanjoint, Hardy-Spicer joint, or Hooke's joint) is a joint orcoupling in a rigid rod that allows the rod to 'bend' in any direction, and is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges located close together, oriented at 45° to each other, connected by a cross shaft. The universal joint is not a constant velocity joint.
 
The working Speed can reach 4000RPM  for the CN series ,and the working torque can reach 600N.M for the PB series .