HGR15 / HGR20 Square Linear Guide Rail Kit — high-precision linear motion components designed for reliable, low-friction guidance in industrial and hobby automation. Key benefits Precise, smooth linear motion: Square HGR rails combined with matched HGH/HGW slider blocks reduce play and ensure repeatable travel for positioning and feed systems. High durability and load capacity: Slider blocks and rails are manufactured from high-quality bearing steel for long service life under continuous or intermittent loads. Easy integration and compatibility: Available in HGR15 and HGR20 sizes to match common machine frames; compatible with HGH-CA (standard) and HGW-CC (flange) slider block form factors for flexible mounting. Reduced maintenance needs: Hardened steel running surfaces resist wear; regular lubrication keeps performance consistent over time. What’s included 2 x HGR linear guide rails (HGR15 or HGR20) 4 x slider blocks (compatible models: HGH15CA / HGH20CA or flange type HGW15CC / HGW20CC) Linear bearings made from high-quality bearing steel Important attributes Function: Provides guided linear motion for moving assemblies, tables, carriages, and actuation stages. Compatibility: Choose HGR15 for 15 mm rail systems or HGR20 for 20 mm systems. Slider block options include HGH-CA series (standard blocks) and HGW-CC series (flange-mounted blocks) to fit different mounting requirements. Size: HGR15 and HGR20 correspond to standard square rail profiles used across many machine designs. Material: Hardened bearing steel for rails and blocks, offering wear resistance and dimensional stability. Performance: Engineered for low friction, accurate guidance, and sustained load-bearing in lateral and moment loads when properly mounted. Use scenarios CNC router or milling table: Dual rails with four slider blocks provide a rigid, repeatable X- or Y-axis guide for workholding and tool motion. Automated assembly or pick-and-place equipment: Smooth, accurate linear guidance for carriers or actuator stages where repeatability and low maintenance are required. 3D printers, laser cutters, and inspection stages: Upgrade or replace existing guides with HGR15/HGR20 rails and HGH/HGW slider blocks to reduce vibration and improve print/scan accuracy. Installation and maintenance notes Ensure correct rail alignment and secure mounting surface to preserve precision and load distribution. Select the slider block type (HGH-CA or HGW-CC) that matches your mounting orientation: standard block for inline mounting, flange block for perpendicular or face mounting. Periodic lubrication and inspection of seals will extend service life and maintain smooth operation. This kit supplies the core components for a robust square linear rail system: HGR15 or HGR20 rails plus four matching HGH-CA or HGW-CC slider blocks, all manufactured from high-quality bearing steel for dependable linear motion.