Heavy Duty 8mm By 300mm Linear Motion Guide Rod Chrome Plated Case Hardened For 3D Printer DIY CNC Projects Built Tough With Metric H8 Tolerance And 58 To 64 HRC Hardness 0.1mm Straightness Per 1000mm 2 Pack Mssoomm

Heavy Duty 8mm x 300mm Chrome Linear Rail Shaft, 58-64 HRC
✔️ 8mm diameter, 300mm length, chrome plated, HRC58-64, 2 pcs

This heavy-duty linear rail shaft rod is built from high-quality carbon steel with chrome plating and case hardening to 58-64 HRC, designed for CNC machines, 3D printers, automation lines, and engraving systems. It provides sturdy, precise support for guiding motion and bearing loads.

✅ Diameter: 8 mm; Length: 300 mm; Tolerance: H8; Hardness: 58-64 HRC
✅ Chrome thickness: 15-20 μm; Straightness: ≤0.1/1000 mm; Roughness: Ra 0.8-1.6
✅ End chamfers on both ends for easy installation; Material: C45 steel with chromium plating 15-20 μm
✅ Pack: 2 pcs included

💡 What is a heavy-duty linear rail shaft used for in CNC machines and 3D printers?

This handy shaft keeps motion smooth and accurate under load in compact builds. - sealed ball bearing compatible rails and linear slide units for DIY machines - 8 mm diameter rail shaft, 300 mm length, chrome plated and hardened to HRC58-64 - improves precision, reduces wear, and extends service life