4 clamping levers with eccentrical cam are used for rapid clamping and releasing operations. The lever has been designed to insure that its movement cannot exceed the maximum clamping position.GN927.
4-63-1/4X20-30-A-B Clamping Lever In contrast to a clamping operation utilizing only threads and a lateral force, these levers permit torque-free clamping via a combined downward vertical and cam actuated motion.