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NFS20 One-Way Backstop Clutch - Bearing Support Required 20x52x21mm
NFS20 One-Way Clutch
✔️ Sprag Freewheel with Seals - 20mm x 52mm x 21mm
The NFS20 is a one-way clutch bearing, also called a sprag freewheel or backstop, designed for systems that need rotation in one direction only. Commonly used in conveyors, hydraulic equipment, mining, textile, printing, and washing machines, it prevents reverse motion during power loss.
✅ Type: One-way clutch / sprag freewheel
✅ Inner diameter: 20mm
✅ Outer diameter: 52mm
✅ Width: 21mm
✅ Torque capacity: 62 TKN
✅ Max torque: 155 TKN
✅ Inner race overrun speed: 2,100 RPM
✅ Outer race overrun speed: 3,100 RPM
✅ Bearing support: External bearing required (non-bearing supported)
✅ Pack size: 1 clutch
Dimensions table (mm):
| d | D | L | D2 | b | t | s | e | f |
|---|---|---|---|---|---|---|---|---|
| 20 | 52 | 21 | 42 | 6 | 2.3 | 2.4 | 1.2 | 0.8 |
💡 Why use one-way clutch bearings in conveyors and machinery?
One-way clutches provide controlled motion and safety in power systems.
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Allow free rotation in one direction, lock in the opposite
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Prevent equipment from rolling back under gravity during shutdowns
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Handy for conveyors, indexing drives, and overrunning mechanisms
Reliable, compact, and built for control, grab the NFS20 today and keep your systems moving in the right direction.