2Pcs 12mm x 400mm Linear Rail Rod Shafts, case hardened chrome plated C45 carbon steel linear motion guides with smooth bearing support, accurate diameter and length tolerance for CNC, 3D printers and automated machinery

2Pcs 12mm x 400mm Chrome Linear Rail Rod Shaft for Motion Systems
✔️ Case Hardened Linear Shaft Guide for 3D Printers and CNC

This is a set of case hardened linear rail rod shafts made for smooth, steady motion in compact to mid-size mechanical builds. These rods are commonly used in 3D printers, CNC machines, engraving setups, and automated equipment where straight travel and dependable bearing contact are key. Pack size is 2 pieces.

✅ Pack size: 2 pieces
✅ Shaft diameter: 12 mm
✅ Shaft length: 400 mm
✅ Diameter tolerance: ±0.5 mm
✅ Material: C45 carbon steel
✅ Surface finish: chromium plated for improved wear resistance
✅ Case hardened outer layer for extended operating life
✅ Designed for linear bearing and guided motion applications
✅ Commonly used in CNC, 3D printers, automation, and molding machines

Dimensions
Diameter 12 mm
Length 400 mm

💡 Why are case hardened chrome linear shafts used in linear bearing guide systems?
Case hardened chrome linear shafts are built to keep motion smooth while holding accuracy under repeated sliding loads.

• Hardened surface limits wear from linear bearings and bushings

• Chrome plating improves smooth travel and protects against surface damage

• Maintains straightness and alignment during continuous motion

• Well suited for precision linear guides in CNC and automated machinery

A handy choice when you need durable linear shafting that delivers clean motion, solid bearing support, and consistent performance in precision-driven setups.