Linear Motion Guide Rails Set, 2 Pack 6mm By 200mm Chrome Case Hardened Rails For 3D Printers And CNC Machines, DIY Makers With h8 Tolerance, Gear Heads, 55 To 60 HRC Carbon Steel, Silver

2-Pack 6mm x 200mm Linear Motion Rails, Chrome Steel
✔️ 6mm dia, 200mm length, HRC 55-60, h8 tolerance

These linear motion rails are case-hardened chrome steel shafts designed for precise shaft guidance in CNC machines, 3D printers, automatic machinery, injection molding equipment, and engraving setups. They pair with standard bearing systems and closed-type slide units for smooth, low-noise operation.

✅ 2 pieces included in pack (6mm x 200mm)
✅ Case hardened chrome steel (C45) with 10-20 µm chromium plating, 55-60 HRC
✅ Diameter 6 mm with tolerance -0.005 to -0.03 mm
✅ Length 200 mm with tolerance 0.5 mm (199.5-200.5 mm)
✅ Ra 0.8 surface finish, straightness under 5 m/100 mm
✅ h8 tolerance standard for compatibility with bearing systems

💡 What is the role of h8 tolerance in these rails and how does it affect fit with standard bearings?

- h8 diameter tolerance provides precise, consistent bore size for mounting blocks
- tight tolerance reduces shaft play at high speeds and improves repeatability
- supports compatibility with standard bearing housings and linear slide units
- improves interchangeability across compatible suppliers and assemblies