Shaft and hub are strongly coupled by pumping oil into the sleeve under pressure to move the wedge of the built-in taper piston.The oil used for coupling is only necessary for moving the piston, so after coupling is achieved, the pressure is released and the taper piston is held in place by the wedge effect.
High torque and high thrust
Since the wedge is moved by hydraulic pressure using a pump, the rated torque is very large and able to stand up to heavy thrust loads.
