MGN9B Linear Guide Rail Durable bearing steel construction provides strength and extended service life with strong abrasion resistance for demanding applications such as CNC machinery, delivering steady performance under continuous use. Accurate 4point connection design supports loads from all directions with strength and precision, ensuring stable movement and minimized deflection for accuracy tasks in 3D printers and automated equipment. Ball retainer and easy lubrication: the slider uses a ball retainer for smooth motion and easy replacement; a side oil inlet enables straightforward lubrication to reduce friction and extend component life in dusty workshops or during prolonged operation. Compact and lightweight: 9 mm width and 75 g weight enable easy integration into space constrained projects and small machinery without adding bulk. Typical applications Desktop CNC routers, milling machines, and gantry systems requiring reliable, precise linear guidance in confined spaces. 3D printers and other additive manufacturing equipment needing accurate, repeatable motion on the X and Y axes. DIY robotics and small automation projects deployed in dusty environments or with long operation cycles, where easy lubrication and durable wear resistance are beneficial. Specifications Model: MGN9B Material: strength bearing steel Width: 9 mm Weight: 75 g Connection: 4point Ball retainer: present Side oil inlet: present