{"product_id":"square-linear-guideway-rail-hgw20-70-87in-rail-2-hgw20ca-blocks","title":"Square Linear Guideway Rail HGW20 70.87in Rail + 2 HGW20CA Blocks","description":"\u003cp\u003eIn this review of the Square Linear Guideway Rail HGW20 70.87in set, the bottom line is practical: this kit is aimed at hobbyists and small CNC builders who need a robust, high-precision rail and carriage pair without complicated sourcing. The reviewer found the combination of a 1800mm HGW20 rail and two HGW20CA flange carriage blocks delivers reliable linear motion, durable bearing construction and easy interchangeability with other 20mm square rail systems, making installation and future upgrades straightforward.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-carbon steel rail:\u003c\/strong\u003e The quenched and tempered rail resists wear and maintains straightness for long-term, repeatable linear motion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoethe-style four-point contact:\u003c\/strong\u003e The carriage design spreads load evenly in all directions and offers a self-aligning ability that compensates for small mounting errors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange carriage blocks:\u003c\/strong\u003e The HGW20CA flange sliders use thicker bearing steel and additional balls for higher load capacity and smoother travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable design:\u003c\/strong\u003e This set is compatible with other 20mm square rail kits, which simplifies replacements and upgrades on existing machines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom length support:\u003c\/strong\u003e The manufacturer offers custom lengths and splice options for runs longer than 2950mm, useful for bespoke machines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Square Linear Guideway Rail HGW20 set is best suited for DIY CNC builders, small shop machinists, and fabricators who need a sturdy 20mm square rail and dependable flange blocks for gantries, router tables or linear stages. It is also appropriate for repair work where a direct replacement for HGH\/HGR-style 20mm rails is required.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for users who require integrated mounting hardware, preloaded bearings, or a fully assembled linear carriage system out of the box; these buyers should consider more turnkey linear guide assemblies that include rails fastened to pre-machined plates.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSturdy high-carbon steel rail provides strong bending resistance and long wear life.\u003c\/li\u003e\n\u003cli\u003eFlange HGW20CA blocks with thicker bearing steel feel smooth and handle higher loads than thinner variants.\u003c\/li\u003e\n\u003cli\u003eFour-point contact design ensures even load distribution and some self-alignment on imperfect mounting surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSold as rail plus loose carriage blocks, so buyers must do their own mounting and alignment during assembly.\u003c\/li\u003e\n\u003cli\u003eMaintenance requires periodic greasing (recommended #46 grease) which adds routine upkeep for long service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMssoomm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eHGW20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRail width\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRail length\u003c\/td\u003e\n\u003ctd\u003e1800mm (70.87in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded carriage blocks\u003c\/td\u003e\n\u003ctd\u003e2 x HGW20CA flange type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-carbon steel rail; bearing steel blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaintenance\u003c\/td\u003e\n\u003ctd\u003e#46 grease recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe HGW20 1800mm rail with two HGW20CA flange carriages is a solid choice for builders who need a durable, high-precision 20mm square rail that is interchangeable with HGH\/HGR-style systems. It delivers good value when you factor in long wear resistance, strong load handling and the option for custom lengths, provided you are prepared to install and maintain the components yourself.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this rail be made longer than 1800mm?\u003c\/strong\u003e\u003cbr\u003eYes, the supplier offers custom lengths and splicing for total lengths exceeding 2950mm; contact the seller for bespoke dimensions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat maintenance does the kit need?\u003c\/strong\u003e\u003cbr\u003ePeriodic lubrication with #46 grease is recommended to maintain smooth travel and extend service life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this compatible with HGH or HGR 20mm parts?\u003c\/strong\u003e\u003cbr\u003eYes, the HGW20 set is designed to be interchangeable with similar 20mm square linear rail systems like HGH\/HGR variants.\u003c\/p\u003e","brand":"Mssoomm","offers":[{"title":"Default Title","offer_id":48224261079259,"sku":"B08BJKD2FQ","price":302.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61XEkdehkML._SL1500_600edffa-b903-4f46-a9e3-3c65e22bd944.jpg?v=1770821864","url":"https:\/\/gearmusthave.com\/products\/square-linear-guideway-rail-hgw20-70-87in-rail-2-hgw20ca-blocks","provider":"GearMustHave","version":"1.0","type":"link"}