HGR15 / HGR20 Square Linear Guide Rails with HGH-CA / HGW-CC Slider Blocks Why this product Precise, reliable linear motion for machines that require repeatable positioning and low friction. Square HGR profile offers higher rigidity and better moment-load resistance than round shaft setups, improving stability under side loads. Built from high-quality bearing steel to deliver long service life and consistent performance in industrial and hobby applications. What you get 2 x HGR linear guide rails (available as HGR15 or HGR20) 4 x compatible slider blocks: HGH15CA / HGH20CA (standard blocks) or HGW15CC / HGW20CC (flanged blocks) Linear bearings and blocks manufactured from high-quality bearing steel Key benefits and features Smooth, low-friction travel: reduces vibration and improves final surface finish or positioning accuracy. High load capacity and rigidity: square rail geometry and robust slider blocks resist deflection and moment loads. Durable construction: bearing-steel components provide wear resistance and long life in continuous operation. Flexible mounting and compatibility: designed to fit standard HGR/HGH/HGW series systems for easy replacement or upgrades. Compact design: ideal where space and stiffness are both important. Performance and suitability Function: provides guided linear motion for carriage assemblies, gantries, stages, and tooling. Sizes: HGR15 and HGR20 options to match required load capacity and installation envelope. Material: slider blocks and rails use high-quality bearing steel for consistent rolling contact performance. Typical applications CNC routers and milling machines: stable, repeatable motion for tool heads and worktables. Industrial automation and robotics: precise linear stages for pick-and-place, inspection, or conveyor alignment. Laboratory and measurement equipment: smooth, low-backlash travel for optical stages and positioning systems. Quick installation and maintenance notes Compatible with standard HGR/HGH/HGW mounting patterns for straightforward replacement or retrofit. Regular light lubrication and periodic inspection of mounting screws will maximize life and maintain accuracy. Package contents (exact) 2 x HGR linear rails (HGR15 or HGR20) 4 x slider blocks (HGH15CA / HGH20CA or HGW15CC / HGW20CC) Linear bearings made from high-quality bearing steel If you need help selecting HGR15 versus HGR20 or choosing between HGH-CA and HGW-CC block types for your application, provide your load and travel requirements and we can recommend the best combination.