Sprag Clutch with Mounting Tab Stops Motion
Our RA Series backstopping clutch is a combination of our FND 400 complete unit with seals, inner ring keyway and an outer ring mounting tab. This heavy-duty clutch is good for high torque operations and ensures motion freezes in place.
Commonly referred to as a hold-back clutch, it prevents the rotation from moving in the reverse direction. Some applications that rely on an RA Series sprag clutch are:
- Conveyors
- Gear Reducers
- And more
Components of the RA Series Backstopping Clutch
Our RA Series backstopping sprag clutch has a keyway at the inner ring and mounting tab at the outer ring. Other key characteristics:
- Bore diameter (ID): 15 to 40 mm
- Outer Diameter (OD): 65 to 110 mm
- Width: 34 mm
- Double sealed
- Operating temp: 212 F / 100 C
- Oil lubricated for life
- Manufactured with our FE 400 Z tension spring
- On request, they can be manufactured with our FE 400 M meander spring
RA Complete Sprag Clutch Series
| Slug | GMN Series | Part No | Shaft Diameter (d) [mm] | Outer Diameter (D) [mm] | Width (b) [mm] | Torque (M) [Nm] |
|---|---|---|---|---|---|---|
| sc-ra-437-z-complete-freewheel-clutch | RA | 437 Z | 15 | 65 | 5 | 161 |
| sc-ra-442-z-complete-freewheel-clutch | RA | 442 Z | 20 | 75 | 6 | 208 |
| sc-ra-453-z-complete-freewheel-clutch | RA | 453 Z | 25 | 90 | 8 | 314 |
| sc-ra-459-z-complete-freewheel-clutch | RA | 459 Z | 30 | 100 | 8 | 381 |
| sc-ra-463-z-complete-freewheel-clutch | RA | 463 Z | 35 | 100 | 10 | 428 |
| sc-ra-470-z-complete-freewheel-clutch | RA | 470 Z | 40 | 110 | 12 | 509 |
| sc-ra-473-z-complete-freewheel-clutch | RA | 473 Z | 45 | 110 | 14 | 543 |
Torque Information
Backstops are able to transmit nominal torque mounted on solid shafts. Mounted on hollow shafts the transmittable torque decreases. In this case please contact us to receive a calculation on the transmittable torque for your application.