SBR20UU linear motion ball bearing slide block pair, part of the SBR family (SBR10UU, SBR12UU, SBR16UU, SBR20UU, SBR25UU). This listing includes 2 pieces of the SBR20UU block. Key benefits Smooth, lowfriction linear motion: precisionmachined surfaces and recirculating ball bearings provide consistent, lightweight travel along compatible rails. Durable and reliable: steel housing with sealed ends helps protect bearings from dust and contaminants while maintaining lubrication. Easy replacement and maintenance: standard SBR20UU blocks are designed to be compatible with common SBR rails in 20 mm systems, enabling straightforward upgrades or repairs. Flexibility for multiaxis setups: a twopiece pack lets you configure or a drive axis quickly, or use one block as a spare. Key attributes Functionality: linear motion ball bearing slide blocks designed for use with SBR rails to create smooth X, Y, or Z axis movement. Compatibility: intended for SBR rail systems in the SBR20UU size (20 mm rail family); part of the broader SBR range that includes SBR10UU, SBR12UU, SBR16UU, SBR20UU, and SBR25UU. Size: SBR20UU blocks; two pieces included. Material: steel housing with precisionmachined bore for reliable bearing engagement. Performance: sealed (UU designation) to improve durability and keep lubrication in place for longer service life. What's included 2 x SBR20UU linear motion slide blocks. Common applications 3D printing: axis movement for the print bed or extruder carriage, enabling smooth, accurate motion on a 20 mm rail system. CNC routing or milling: supporting precise X or Z axis travel in compact machine builds or retrofits. Automation equipment: linear actuation for pickandplace, conveyors, or positioning stages that require dependable, lowfriction movement. Installation considerations Designed to align with standard SBR20UU rails; ensure correct rail pairing for performance. Check mounting hole alignment and fastener compatibility with your frame to secure blocks firmly. Lubrication: seals help retain lubrication; follow your rail manufacturer's guidance for lubrication when assembling and after maintenance. This product maintains a professional, credible profile consistent with the SBR line, offering a practical solution for reliable linear motion in hobbyist and professional applications alike.