The Stieber AL Ø12 mm freewheel is an ultra-compact, high-speed one-way clutch from the AL series – part of Stieber’s modular system. Made from hardened steel and brass, it is designed for low-torque, high-precision indexing, backstop, and overrunning in micro-mechanical assemblies.

Technical Attributes:

• Shaft diameter: Ø12 mm

• Maximum torque: 55 Nm

• Drag torque: 3.4 Ncm

• Overrunning speed (imax): 4000 rpm

• Outer race speed (amax): 7200 rpm

• Bolt holes: 3

• Materials: Steel and brass

• Bearing support: Two 160-series bearings

• Lubrication: Requires oil lubrication

• Mounting: Outer race is plain for centering H7-bored components

• Accessories: Delivered with two paper seals for cover plate interface

Design and Integration:

• Roller-type freewheel, fully supported in oil-lubricated systems

• Not to be axially stressed – must be installed in bearing-supported housings

• Typically used with standard covers that provide torque transmission and sealing

• Torque transmitted through cover bolts (model AL) or keyway (model ALP)

• Perfect for miniaturized drive systems in automation, instrumentation, and robotics