Renold SH sprag clutch holdbacks

摘要

Renold Clutches & Couplings' SH series of sprag clutch holdbacks with central torque arm offer an effective solution for arduous, heavy-duty applications, such as inclined belt conveyors and bucket elevators where reverse running, due to loss of drive, could have catastrophic consequences. If drive is lost, the SH sprag clutch holdback is said to instantaneously prevent any runback. Inclined conveyors are commonly found at mines, quarries and cement works. Many of them are of considerable length and the weight of material on them at any one time can be enormous. If the drive stalls and the conveyor back-drives, it will accelerate due to gravity until all the load on the conveyor has been dumped at the bottom.