Hydraulically actuated and released clutches and brakes and combination clutch/brake units Actuated with hydraulic pressure and internal components immersed in oil, this line of clutches and brakes is ideal for applications that require high cycle rates and or high speeds. The oil film aids in transmitting the torque until the unit is fully engaged. The heat generated during engagement is transferred to the oil and is transmitted away from the working surfaces by the circulating oil. Features of hydraulic units are: Long component life, wear is virtually non-existent Maintenance intervals increased by a factor of 5 to 10 times Low driven inertia Faster response speed Higher cyclic rates and operating speeds than standard air actuated dry running units Hydraulically actuated units with internal dry running components are also available.