Warner CB Series Clutch/Brake units are outstanding in their own respect. They start and stop loads, driven by a continously rotating power source, at amazing speeds at an accuracy of +/- 0.5 degree noncumulative. Cycle rates of up to 20 per second are possible. Nominal acceleration to full speed is only 3 ms, decceleration 1.5 ms independent of the load. Simple design, they are easy to install. Mounted on the outputshaft, with a restraint against rotation, the input is always through the free hub. Only a short electrical pulse DC or AC to the solonoid is required to trigger a cycle.