The backstop should also be designed so that its outer race is the stationary element and the inner race does all the overrunning or freewheeling. This permits an easy, low cost installation.

Marland Clutch has the ideal high-speed backstop.
IBS models feature a sprag backstop that is made for an overrunning inner race and has sprags that lift off of the outer race at high speeds. The IBS models are designed to be built into your equipment on the high-speed or intermediate speed shaft where the torque is the lowest.

The IBS "lift-off" design eliminates the constant rubbing and wearing of the sprags when the backstop device is freewheeling.

The IBS models design makes them simple to apply to your equipment. The inner race is put on the shaft and the outer race is fixed to the housing.