The SC25UU linear slider is a single unit designed to provide precise linear guidance with an inner diameter of 25 mm. It is intended as an optical axis support base and serves as a versatile CNC accessory and 3D printer linear guide slider. Built to fit standard 25 mm shafts, this slider enables accurate, repeatable movement in a compact, single piece form. Key benefits Precise linear motion along a 25 mm axis for reliable positioning in assemblies and machines. Versatile use as an optical axis support base, supporting alignment and mounting of sensors, cameras, lasers, or other optical components. Easy integration into CNC and 3D printer projects that require a 25 mm bore and stable guidance. Simplified assembly with a single piece design, reducing parts count in your build. Compatible with standard 25 mm diameter shafts and optical axis configurations, facilitating straightforward upgrades or retrofits. Key attributes Model: SC25UU Inner diameter: 25 mm Function: linear slider; optical axis support base; CNC accessory; 3D printer linear guide slider Compatibility: fits 25 mm diameter shafts/optical axes Size and form: inner bore 25 mm, designed as a single piece Material: not specified in the listing Performance: intended to provide smooth guided motion suitable for typical hobbyist and professional applications Use cases CNC equipment: as a main slider in a compact CNC router or milling module, enabling precise X axis movement along a 25 mm shaft. 3D printing: as a replacement or upgrade for X or Z axis guidance in a 3D printer to improve repeatability and smoothness of motion. Optical alignment or testing: as an optical axis support base to align and mount sensors, cameras, or laser components along a 25 mm axis for stable, repeatable positioning. Notes for installation and compatibility Ensure your setup uses a 25 mm diameter shaft or optical axis to match the inner bore. Plan mounting around the 25 mm bore and singlepiece slider geometry for straightforward integration with existing frames and fixtures. This description stays aligned with the product model SC25UU and highlights its 25 mm inner diameter, optical axis support base role, and suitability as a CNC and 3D printer linear guide slider. It presents practical benefits, clear attributes, and relevant use cases in professional, easytoread language.