This is a set of five LM12LUU 12mm linear ball bearing bushings. They are designed to ride on 12 mm round shafts to deliver smooth, precise linear motion in a variety of applications. Key benefits Low friction linear guidance on 12 mm shafts for smooth movement Option for replacement to restore accuracy and performance in existing assemblies Multipack provides spare parts or multiple axis use from a single Simple integration with standard 12 mm shaft systems and LM12LUU compatible mounts Robust design aimed at reliable operation in everyday machining, automation, and hobby projects Key attributes Model: LM12LUU Type: Linear ball bearing bushings Bore / shaft size: 12 mm Quantity: 5 pieces Function: Enables linear motion with reduced friction on 12 mm shafts Compatibility: Designed for standard 12 mm shaft systems and LM12LUU style components Additional details Construction aligns with the LM12LUU bearing family to provide consistent fit and performance on 12 mm shafts Suitable for use in a range of equipment that requires precise, linear motion and dependable rotation along an axis Applications and use cases Replacing worn or degraded bushings on a CNC machine, 3D printer, or laser cutter to restore smooth axis movement Upgrading motion quality in a compact automation setup such as a robot arm, sliding gantry, or tool head on a 12 mm shaft Building or refurbishing a sliding table or linear guide system in workshop equipment that uses standard 12 mm shafting Notes Ensure proper shaft cleanliness and alignment during installation for performance Verify compatibility with your LM12LUU bearing system and mounting hardware before assembly