• Heavy duty sprag clutches eliminate reverse rotation when used on non-backdriving applications.
• Precision sprags create instantaneous action with no backlash
• High Torque capacity yet compact design
• Enhanced sealing available on large clutch sizes for use in hostile environment
• All clutches are fitted with high precision heavy duty bearings for arduous duty applications
• Grease lubrication available where maintenance is difficult or where high inner race overrunning speeds are required
• SO series clutches, grease lubricated for use on general purpose backstopping applications

Applications

• Conveyor drives
• Elevators
• Fan drives
• Feeders
• Pumps
• General industrial applications

The applications shown are an inclined belt conveyor and a vertical bucket elevator using conveyor chain. Both applications require the use of a sprag clutch backstop or holdback. If reverse rotation occurred serious safety problems would be created and possible machinery failure.

To overcome the problem of drive reversal a Renold sprag clutch backstop clutch is fitted to the conveyor headshaft and held with a torque arm against stops fitted to the framework of the conveyor.

SLH Series Sprag Clutch Holdbacks - Sizes 700 to 1027

Variable sprag clutch holdback torque arm and sideplate design arrangements are obtainable from Renold Clutches and Couplings. A number of alternative options are shown on pages 42 and 43 of the latest Sprag Clutch Catalogue

SLH Series Sprag Clutch Holdbacks - Sizes 1051 to 5000  

Sprag Clutch sizes 700-900 Alternative Design	Sprag Clutch size 1027 only Alternative Design

Variable sprag clutch holdback torque arm and sideplate design arrangements are obtainable from Renold Clutches and Couplings. A number of alternative options are shown on pages 42 and 43 of the latest Sprag Clutch Catalogue.