Five precision linear bearings for CNC routers: SBR10UU, SBR12UU, SBR16UU, SBR10LUU, and SBR12LUU. Bore sizes 10, 12, and 16 mm to fit common shafts and rails. Pair with SBR20LUU linear guide rails for smooth X, Y, or Z axis movement. Key benefits Smooth, accurate motion with low friction for repeatable cuts and consistent toolpaths. Improves rigidity and reduces play on the router gantry to maintain tolerance and surface finish. Standard 10, 12, and 16 mm bores for broad compatibility and easy replacement of worn components. Durable design built for demanding CNC use and continuous operation. Straightforward maintenance and simple replacement to minimize downtime. Function and compatibility Includes models: SBR10UU, SBR12UU, SBR16UU, SBR10LUU, SBR12LUU. Bore sizes: 10 mm, 12 mm, 16 mm — fits common shafts and linear guide rails. Compatible with SBR20LUU linear guide rails for full-axis guidance on X, Y, or Z axes. Performance and applications Reduces backlash and vibration to support precise milling, engraving, and routing on wood, plastics, and light aluminum. Enables modular builds or upgrades to existing machines where reliable linear guidance is required. Suitable for hobbyist and light-industrial CNC routers, compact mills, and engravers. Use scenarios Upgrade a DIY CNC router gantry to achieve cleaner pockets, smoother finishes, and more consistent toolpaths. Replace worn bearings on X and Y axes to restore positional accuracy and reduce chatter. Build a compact, high-precision CNC mill or engraver that requires reliable, repeatable linear movement. Notes Compatible with SBR20LUU rails for full axis guidance.