NFS40 One-Way Backstop Clutch - 40x90x33mm - Bearing Support Required

NFS40 One Way Clutch
✔️ 40x90x33mm - Backstop Sprag Clutch - External Support Needed

The NFS40 is a one-way sprag clutch (also known as a backstop clutch) designed for use in applications that require controlled rotation in one direction only. Ideal for conveyor systems, mining equipment, and indexing mechanisms, this clutch prevents reverse motion during power loss. It is non-bearing supported and must be installed with external bearing support.

✅ Size: 40mm (ID) x 90mm (OD) x 33mm (Width)
✅ Type: One-way sprag clutch (freewheel/backstop)
✅ Rotation: Allows motion in one direction only
✅ Applications: Indexing, overrunning, and backstopping
✅ Construction: Non-bearing supported – requires external support
✅ Torque capacity (TKN): 430 Nm
✅ Resistance torque (TR): 38 Nm
✅ Quantity: 1 clutch

Additional Dimensions (mm):

• D2: 78

• b: 12

• t: 4.1

• s: 2.5

• e: 1.8

• f: 1

💡 What is a one-way sprag clutch used for?
One-way clutches allow rotation in one direction while preventing reverse motion. They're essential in systems like conveyor belts, where reverse movement can damage products or machinery during sudden stops or power failures.

Reliable backstop protection for directional motion systems in industrial applications.