Beefy 30mm x 300mm Linear Motion Rod With Case Hardened Chrome Shaft For 3D Printers And DIY CNC, High Precision H8 Tolerance, Chrome Plated Rail Guide For Smooth Accurate Linear Travel

30x300mm Chrome-Plated Linear Rod for 1-Piece CNC
✔️ 30mm dia x 300mm length, HRC55-62, Ra0.05-0.08, chrome

This 30x300mm linear motion rod is precision manufactured from 45# carbon steel with a case-hardened chrome plating for smooth, accurate travel. It's widely used in CNC machines, 3D printers, engraving setups, and automation systems to guide moving parts with tight tolerances.

✅ 45# carbon steel core with chrome plating; hardness HRC55-62; surface Ra0.05-0.08
✅ Straightness ≤0.1/1000mm; ends chamfered 1.0-45° for easy assembly
✅ Diameter tolerance -0.01 to -0.03mm; length tolerance ±0.1mm
✅ Chrome plating thickness ~0.01mm for wear resistance
✅ 30x300mm size ideal for CNC, 3D printers, engraving machines

💡 What is a 30x300mm linear motion rod used for in CNC machines and 3D printers? A handy guide:

- Used to guide moving parts along precise straight paths in Cartesian systems - Handy for DIY CNC builds and hobby-grade 3D printers - Chrome-plated surface reduces wear and helps maintain tight tolerances - Compatible with standard bearing blocks and rail guides for reliable travel