NFS17 one way clutch 17x47x19mm sprag freewheel backstop clutch requiring external bearing support designed for overrunning indexing and backstopping applications with controlled one direction rotation

NFS17 One Way Backstop Clutch 17mm Bore
✔️ NFS17 One Way Sprag Clutch 17x47x19mm Single Unit

The NFS17 one way clutch is a sprag style freewheel backstop designed to allow rotation in one direction while locking in the other. It’s commonly used in conveyors, mining equipment, hydraulic systems, printing machines, and lifting applications where reverse motion must be prevented during power loss. This unit requires external bearing support. Pack size is one clutch.

✅ Pack size: 1 clutch
✅ Clutch type: one way sprag clutch backstop
✅ Bore inner diameter: 17mm
✅ Outer diameter: 47mm
✅ Width: 19mm
✅ Function: overrunning, indexing, backstopping
✅ External bearing support required non bearing supported design
✅ Helps prevent reverse rotation caused by gravity or load
✅ Common in conveyors, industrial drives, and lifting systems

Dimensions
Inner Diameter d 17 mm
Outer Diameter D 47 mm
Width L 19 mm
Outer Step D2 40 mm
Width b 5 mm
Thickness t 2.3 mm
Dimension s 2.4 mm
Dimension e 1.2 mm
Dimension f 0.8 mm

Performance
Nominal Torque 39 kNm
Maximum Torque 97.5 kNm
Inner Race Overrun 2300 RPM
Outer Race Overrun 3400 RPM

💡 Why are one way backstop clutches used in conveyor and lifting systems?
One way backstop clutches are designed to allow motion in one direction while automatically locking against reverse rotation.

• Prevents load rollback during power loss or shutdown

• Protects gearboxes and motors from shock loads

• Supports controlled overrunning and indexing motion

• Widely used in conveyors, elevators, and industrial drive systems

This NFS17 one way clutch delivers reliable backstopping and controlled rotation, making it a solid choice when safety, load control, and dependable one direction motion really matter.