Slider Block SBR12UU Model and size Model: SBR12UU Guide width or diameter: 12 mm Intended use Use for CNC parts and systems that require 12 mm linear guide support Key benefits Enables smooth linear motion along 12 mm guide rails Supports reliable, repeatable positioning in CNC applications Easy replacement or upgrade within existing 12 mm rail systems Compact 12 mm size helps fit into tight machine layouts Compatibility and performance Designed to fit 12 mm guide rails SBR12UU block form factor aligns with standard 12 mm rail configurations Suitable for precision CNC parts requiring consistent motion on 12 mm rails 23 practical use scenarios Replacing a worn slider block on the X axis of a small CNC milling machine that uses 12 mm rails Upgrading the Y axis of a desktop 3D printer to improve motion smoothness on 12 mm guide rails Building or upgrading an XY stage for a compact CNC router or engraver using 12 mm guides Notes Install with compatible 12 mm linear rails and mounting hardware Designed for CNC parts and systems requiring 12 mm guide support