This CKZ backstop clutch is widely used for packing machine,marine machine and Metallurgy machine.etc. Type WKZ backstop clutch's construction is the same as CKZ, it is a type sprag freewheel supported by double bearings. used for overrunning speed between 600-1500rmin, torque 180-8000 N.m, even highest torque more than 70000N.m. It allows roation in package machine, derrick machine. Metallurgy ...