The Stieber ASK 50mm freewheel is a compact, self-contained roller-type unit with internal bearing support via two rows of roller bearings. Designed for Ø50 mm shafts, it is grease-lubricated and dust-protected for maintenance-free operation. The unit offers a maximum torque capacity of 125 Nm and a drag torque of 20 Nm, ideal for overrunning, indexing, and backstop functions.

With outer dimensions conforming to the 60-series radial bearing standard, the ASK freewheel is well-suited for direct integration in existing mechanical designs. Torque is transmitted through a press-fit mounting on both the inner and outer race, with C4 radial clearance as standard to accommodate the interference fit.

Recommended mounting tolerances:

• Shaft: h6 or j6

• Housing: K6

Note: This unit cannot accept axial loads. Where axial forces exist, external thrust bearings must be installed.

Key Specifications:

• Shaft diameter: Ø50 mm

• Maximum torque: 125 Nm

• Drag torque: 20 Nm

• Type: Roller-type freewheel

• Bearing support: Internal (two roller rows)

• Lubrication: Grease (sealed)

• Outer dimensions: Matches 60-series bearings

• Radial clearance: C4

• Mounting:

  • Shaft: h6 or j6

  • Housing: K6

• Axial load: Not allowed

• Material: Steel