2Pcs 12mm x 550mm 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 550mm 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 built for smooth, controlled motion in precision mechanical systems. These rods are commonly used in 3D printers, CNC machines, engraving equipment, and automated machinery where long travel, straightness, and reliable bearing contact are required. Pack size is 2 pieces.

✅ Pack size: 2 pieces
✅ Shaft diameter: 12 mm
✅ Shaft length: 550 mm
✅ Diameter tolerance: ±0.5 mm
✅ Material: C45 carbon steel
✅ Surface finish: chromium plated for improved wear resistance
✅ Case hardened surface for extended service life
✅ Designed for linear bearing and guided motion use
✅ Commonly used in CNC, 3D printers, automation, and molding equipment

Dimensions
Diameter 12 mm
Length 550 mm

💡 Why are case hardened chrome linear shafts used for long travel linear motion systems?
Case hardened chrome linear shafts are designed to handle extended movement while keeping motion accurate and smooth.

• Hardened outer surface reduces wear from linear bearings during long stroke operation

• Chrome plating improves smooth travel and protects against surface damage

• Maintains straightness and alignment over longer shaft lengths

• Ideal for precision linear guides in CNC machines and automated equipment

A handy choice when you need strong, smooth-running linear shafting that delivers consistent performance across longer motion paths.