Two Pack 12mm x 300mm Linear Guide Rails Set Chrome Plated Steel Shafts for 3D Printers and DIY CNC Machines Dope Precision Linear Motion Rods With 0.05mm Tolerance and Chamfered Ends

Two-Pack 12mm x 300mm Chrome Linear Guide Shafts
✔️ 12mm dia x 300mm length, ±0.05mm tol, chrome plated

You get two 12x300mm linear motion shafts made from 45# carbon steel. Chrome plating adds hardness and rust resistance (0.01-0.02 mm). Chamfered ends make installation easier and safer for fingers. Ideal for 3D printers, CNC machines, automated equipment, engraving, and injection molding setups.

✅ Diameter: 12 mm (0.472 in)
✅ Length: 300 mm (11.81 in)
✅ Tolerance: ±0.05 mm
✅ Material: 45# carbon steel
✅ Surface: chrome plating 0.01-0.02 mm, Ra0.8
✅ Ends: chamfered on both ends for easy bearing install

💡 What is a linear motion shaft used for in motion systems?

They guide moving parts with precision, keeping alignment and reducing friction in equipment. Handy for CNC and 3D printer builds, and easy to upgrade in existing setups.

• handy for a linear slide unit in CNC and 3D printer builds
• works with standard 12 mm bearings for sealed ball bearing setups
• offers rust resistance from chrome plating for long term use
• easy to replace and upgrade in existing setups