The Renold enhanced seal sprag clutch range of products are based on the standard size range of 1027 to 3500. The design of the clutch includes a Labyrinth seal, preventing the ingress of abrasive dust, grit and moisture making it suitable for use in most hostile environments. Each clutch is factory filled with long life grease which reduces working temperature allowing the backstops to operate more efficiently at higher
ambient temperatures.

• Long life lubrication reduces maintenance costs
• Larger heavy duty bearings increasing the running life
• Labyrinth seal to prevent ingress of dust and moisture making it suitable for use in hostile environments
• Detachable side plates allowing interchangeability with other manufacturers backstops

There are many design variations of torque restraint arms to suit applicational demands.The standard Renold holdback design is shown in Fig. 1 and the designs as Fig. 2 and Fig. 3 shows alternatives allowing interchangeability with other manufacturers.