Linear Guide Rail Set, 1800mm, 20mm Shaft, 2 Rails, 4 Blocks

SBR20 linear guide rail set delivers stable, smooth linear motion for CNC routers and DIY automation builds, helping reduce binding and chatter while improving repeatable positioning. This kit pairs hardened steel shafts with a rigid aluminum base and 4 recirculating-ball slide blocks for consistent travel under load. Designed for quick alignment with pre-drilled mounting holes, it suits long-axis builds where accuracy, low noise movement, and corrosion resistance matter.

• Includes 2 × 1800 mm (70.9 in) SBR20 rails plus 4 × SBR20UU slide blocks for a complete linear rail and bearing kit.


• Delivers smooth, low-friction travel via recirculating ball bearings to reduce stutter and improve motion control.


• Handles high loads with dynamic load 882 N and static load 1370 N per block for demanding automation axes.


• Resists wear and corrosion with carbon steel shafts, aluminum support, and a chrome-plated surface.


• Fits CNC, 3D printers, laser engravers, router/mill/lathe sleds, and other linear motion DIY projects.

Build longer, more stable travel with an SBR supported rail system engineered for straightness, rigidity, and repeatable motion. The 20 mm shaft diameter and supported aluminum base help reduce flex across the 1800 mm span, while the matched SBR20UU blocks keep movement controlled for cleaner cuts, smoother prints, and more consistent engraving passes. If you’re upgrading an axis or starting a new CNC or automation frame, this kit gives you the core components to mount and run quickly. Grab yours today.

• Guide rail length: 1800 mm (70.9 in); quantity: 2 rails


• Slide blocks: 4 × SBR20UU; block size: 50 × 48 × 39 mm (2 × 1.9 × 1.5 in)


• Shaft diameter: 20 mm


• Materials: high carbon steel shaft + aluminum base/blocks; chrome-plated surface


• Load rating (per block): dynamic 882 N; static 1370 N


• Mounting hole distance: A 35 mm (1.4 in); B 35 mm (1.4 in)


• Product size (L×W×H): 1800 × 90 × 36.3 mm (70.9 × 3.5 × 1.4 in)


• Net weight: 13.4 kg (29.5 lb)