The Stieber ASNU 8mm is a miniature roller-type freewheel without bearing support, requiring external support for axial and radial loads. With a shaft bore of Ø8 mm, this model supports overrunning speeds up to 3300 RPM (imax) and application speeds up to 5000 RPM (amax). Despite its compact size, it delivers a maximum torque of 12 Nm and a drag torque of 1.6 Nm.

The inner race features a keyway for positive torque transmission to the shaft, while the outer race is designed with n6 tolerance for a press-fit in H7 housings. Side notches on the outer ring further ensure torque engagement unless a K6 housing fit is used and structural rigidity is guaranteed. The outer dimensions match 63-series ball bearings, facilitating integration into space-constrained systems alongside standard bearings.

Ideal for compact indexing, overrunning, or backstop systems where space and weight constraints are critical.

Key Features:

• Ø8 mm shaft interface

• Roller-type freewheel, non-bearing supported

• Max torque: 12 Nm, drag torque: 1.6 Nm

• Overrunning speed: imax 3300 RPM, amax 5000 RPM

• Keyed inner race, press-fit outer race (n6)

• ± S/2 axial misalignment tolerance

• Outer diameter matches 63-series ball bearings

Specifications:

• Type: ASNU

• Shaft diameter: Ø8 mm

• Max overrunning speed (imax): 3300 RPM

• Max application speed (amax): 5000 RPM

• Max torque: 12 Nm

• Drag torque: 1.6 Nm

• Inner race: Keyed

• Outer race: n6 tolerance with notches

• Material: Steel

• Bearing support: Not included (external required)

• Lubrication/Sealing: Must be externally provided