Mssoomm Linear Motion Shaft Rod Guide D 28mm x L 112.2 inch / 2850mm 2Pcs, Hollow Rod D 28mm Inner Hole 20mm Smooth Steel Case Hardened Chrome Plated for 3D Printer, CNC - h7 Tolerance

Mssoomm Linear Motion Shaft Rod Guide D 28mm x L 112.2 inch / 2850mm 2Pcs, Hollow Rod D 28mm Inner Hole 20mm Smooth Steel Case Hardened Chrome Plated for 3D Printer, CNC - h7 Tolerance

• Unlike solid linear shaft rod optical shafts, hollow linear rod can reduce weight and improve bending and torsional resistance, with better strength-to-density ratio and specific stiffness, suitable for CNC, 3D printer, automatic machinery, injection molding machine, engraving machine
• Tolerance: Metric h7, hardness about HRC 58-60, hardening depth: 0.8-3mm, straightness≤ 0.07/1000mm, chrome thickness: 0.015mm-0.02mm, roundness: no more than 3μm, surface roughness: ra0.1m - 0.35m
• Adapting C45 high quality carbon steel, high frequency quenching, surface chromium plating. Using mirror polishing technology, more durable and corrosion-resistant.
• Humanization Design: Chamfer on both ends, easier to install linear bearings and won't hurt fingers when installing it
• We can customize the linear rail, including the length and end processing, showed as image 3.With full series of diameters: 5, 6, 8, 10, 12, 13, 14, 16, 20, 25, 30, 35, 40, 50mm and so on, any special needs, please give us message