For high-indexing conveyor belt drives (up to 80 starts/stops per min), clutch brake allows internal 8.5 in. dia drum motor to run continuously and engages pulley shell only when conveyor movement is desired. Motor with clutch brake eliminates in-rush of startup current; clutch brake lets motor operate in neutral, minimizing heat buildup. Motor comes in 0.5-5.5 hp, with face widths from 16.73-39.38 in.