Type WKZ construction is the same as CKZ, it is a type sprag freewheel supported by double bearings. used for overrunning speed between 600-1500r／min, torque 180-8000N.m,  even  highest  torque  more  than 70000N.m. It allows roation in package machine,conveyor, belt conveyor machine, fishing net machine, elevator machine, reducer machine, well drill, metallurgy, mine machine, cement machine, chemical engineering, etc.