This set includes four SBR20UU aluminum block linear motion slide blocks designed to pair with SBR20 20 mm linear guide rails. Built for smooth, accurate movement, these blocks are a practical choice for CNC, automation, and precision machinery projects. Key benefits Smooth, lowfriction motion: ball bearing slide blocks deliver steady, precise movement along the SBR20 rail. Lightweight yet rigid: aluminum block construction provides a good balance of strength and reduced weight for efficient motion. Easy compatibility: specifically designed to match SBR20 linear guide rails, ensuring reliable fit and consistent performance. Ready for multiaxis use: with four blocks in the package, you can implement multiaxis arrangements or multiple axes of motion in a compact footprint. Durable and maintenancefriendly: robust aluminum housing supports long service life in typical CNC and automation environments; lubrication helps maintain smooth operation. Key attributes Functionality: slide blocks for 20 mm SBR20 linear guide rails; ball bearing mechanism enables smooth linear motion. Compatibility: designed to match SBR20 linear guide rails and the SBR20UU block type. Size: 20 mm axis size (SBR20 series). Material: aluminum block construction for light weight and rigidity. Performance: engineered for reliable, repeatable motion in CNC parts and other precision assemblies. Quantity: 4 pieces included (SBR20UU blocks). Applications and use cases CNC machine axes: install on an SBR20 rail to achieve precise X or Y axis movement with smooth traversing motion. 3D printers and laser cutters: use on the tool head or bed axis to improve print or cut consistency with reduced friction. Robotic and automation assemblies: deploy on linear axes in pickandplace, inspection rigs, or other automated systems requiring controlled linear motion. Notes These blocks are designed to work with SBR20 linear guide rails; ensure matching rail specifications for proper fit. Regular lubrication is recommended to maintain performance and extend service life. Ideal for applications that require reliable, repeatable 20 mm linear motion with aluminum housing and ball bearing slides.