The SC40UU linear slider is a onepiece block designed for 40 mm axis systems and serves as an optical axis support base in CNC and 3D printer setups. It delivers smooth, controlled linear motion along a 40 mm shaft and is compatible with standard 40 mm rails. Key benefits Provides precise, smooth movement for accurate axis alignment Simple integration with common 40 mm rail systems and mounting options Directly supports optical axis alignment in CNC and laser/engraving tasks Compact, robust construction suitable for compact machines and demanding environments Key attributes Model: SC40UU Inner diameter: 40 mm Package: 1 piece Function: linear slider block for 40 mm shaft; optical axis support base Applications: CNC accessories, 3D printer linear guide slider Use cases Optical axis assembly for a CNC router or laser cutter, enabling accurate travel and alignment Upgrading a 3D printer gantry to improve rigidity and motion quality along a 40 mm axis Building a precision carriage for a small milling or engraving device that travels on a 40 mm rail