MGN12 400mm Linear Guide Rail Kit With 2 MGN12H Carriage Blocks And 2 Mini Guides For DIY 3D Printers And CNC Machines Rock Solid Bearing Steel Black Finish

400mm Linear Rail Kit with 2 Carriages for CNC & 3D Printers
✔️ Pack of 2 rails, 2 carriages, 2 mini guides for precise motion

This 400mm linear guide rail kit delivers rock-solid, precise linear motion for DIY CNC machines and 3D printers. Built with bearing steel rails, stainless steel carriages, and a handy plastic mini guide to assist installation, it’s designed to reduce vibration and wear while delivering smooth, controlled movement.

✅ Rail length 400 mm with 12x8 mm cross-section in bearing steel rail
✅ Carriage blocks in stainless steel for accurate, repeatable motion
✅ Mini guide plastic aids installation and keeps balls from dropping
✅ Dual end limit blocks provide collision protection and longer life
✅ Includes 2 rails, 2 carriages, 2 mini guides in a complete kit

💡 What is a linear guide rail used for in precise motion systems? This handy component helps machines move smoothly with high accuracy.

- Improves straightness and repeatability in CNCs and 3D printers - Reduces vibration during rapid moves and heavy cuts - Supports repeatable positioning for precision tasks - Compatible with bearing steel rails and stainless carriages