This is a set of five LM12LUU 12 mm linear ball bearing bushings. They ride on 12 mm round shafts to provide smooth, precise linear motion in a variety of applications. Key benefits - Low friction linear guidance on 12 mm shafts for smooth movement - Replacement option to restore accuracy and performance in existing assemblies - Multipack provides spare parts or multiple axis use from a single set - Simple integration with standard 12 mm shaft systems and LM12LUU compatible mounts - Robust design for 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 equipment that requires precise, linear motion and dependable rotation along an axis Applications and use cases - Replacing worn 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