Product: HGR15 / HGR20 square linear guide rails with compatible slider blocks Key features and benefits Precise, low-friction linear motion: Designed to provide smooth, repeatable linear guidance for positioning and motion applications. High durability and long life: Rails and blocks manufactured from high-grade bearing steel for wear resistance and consistent performance under load. Clear compatibility by model: Available in HGR15 and HGR20 rail sizes with matching slider/block models HGH15CA, HGH20CA and flange-type HGW15CC, HGW20CC for direct interchangeability. Ready-to-install package: Includes 2 linear rails and 4 slider blocks to equip a typical dual-rail carriage or linear stage without sourcing extra components. What’s included 2 × HGR linear rails (choose HGR15 or HGR20) 4 × slider blocks (HGH-CA and/or HGW-CC models corresponding to the chosen rail size: HGH15CA / HGH20CA and Flange HGW15CC / HGW20CC) Function and performance Purpose: Provide rigid, accurate linear guidance for moving parts, reducing play and vibration compared with round shaft guides. Performance focus: High stiffness and precise rolling-element guidance help maintain positional accuracy and smooth travel over extended service life. Material: Linear bearings and rails made from high-quality bearing steel to withstand repeated cycles and moderate to heavy loads. Compatibility and sizing Rail sizes: HGR15 and HGR20 square-profile rails. Select the rail size that matches your application and the corresponding slider-block models listed above. Slider-block models: HGH15CA, HGH20CA (standard blocks) and flange HGW15CC, HGW20CC (flange-mounted blocks). Use the matching block type for your mounting preferences. Practical applications CNC routers and milling machines: Use the rails and blocks to build or upgrade machine axes for improved straightness and repeatable positioning. Industrial automation and pick-and-place systems: Provide reliable linear motion for gantries, conveyors, and handling equipment that require low friction and high rigidity. Precision stages and inspection equipment: Ideal for linear stages, measurement instruments, and test rigs where smooth, predictable travel is required. Why choose these HGR rails and blocks Model-level compatibility: Clear match between HGR rail sizes and HGH/HGW block models reduces selection errors. Durable construction: Bearing-steel components are designed for continuous operation and long service intervals. Practical kit: Two rails plus four blocks supply a complete basic axis assembly for many common configurations. Notes for selection Ensure you select the correct rail size (HGR15 or HGR20) and matching block models (HGH15CA / HGW15CC for 15; HGH20CA / HGW20CC for 20) to match your mechanical design and mounting requirements.