{"product_id":"square-linear-guideway-rail-hgw20-13-39in-rail-and-2-hgw20ca-blocks","title":"Square Linear Guideway Rail HGW20 13.39in Rail and 2 HGW20CA Blocks","description":"\u003cp\u003eIn this review the focus is the Square Linear Guideway Rail HGW20 13.39in kit with two HGW20CA flange carriage blocks. It is aimed at hobbyists and small workshop CNC builders who need a compact, high-precision linear motion solution. The bottom line: this kit delivers stiff, low-friction linear travel in a short, ready-to-install length and is especially useful when reliability under load and ease of assembly matter most. The review highlights build quality, interchangeability, and practical maintenance needs for DIY projects.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHGW20 340mm rail:\u003c\/strong\u003e Provides a 13.39in hardened high-carbon steel rail that resists bending and keeps motion straight under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo HGW20CA flange blocks:\u003c\/strong\u003e Flange-type carriage blocks offer convenient mounting and even load distribution for compact setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-point contact design:\u003c\/strong\u003e The Goethe-style contact geometry supports loads from up, down, left and right while providing self-alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable materials:\u003c\/strong\u003e Quenched and tempered rail and high-quality bearing steel balls give long-term wear resistance and smooth travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable sizing:\u003c\/strong\u003e The kit is compatible with other 20mm square linear rail series, making upgrades or replacements straightforward.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory direct and customizable:\u003c\/strong\u003e The manufacturer offers custom lengths and splicing for longer rails when required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe kit is best for CNC hobbyists, small machine builders, and DIY fabricators who need a sturdy 20mm linear guide for axes on routers, mills, or custom rigs. Its compact 340mm length suits small beds, gantries, or X\/Y axes where a shorter precise travel is required.\u003c\/p\u003e\n\u003cp\u003eThose needing pre-assembled long rails beyond 2950mm or who require specialized sealed carriages for dirty environments should consider alternate products or request custom lengths and options from the supplier. This kit is not a full motion system and will require compatible mounting hardware and lubrication to perform optimally.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-carbon steel rail with quenching and tempering gives strong bending resistance and long wear life.\u003c\/li\u003e\n\u003cli\u003eFlange HGW20CA blocks are sturdy, easy to mount, and distribute loads evenly for stable travel.\u003c\/li\u003e\n\u003cli\u003eFour-point contact and self-aligning design keep motion accurate even with minor mounting surface error.\u003c\/li\u003e\n\u003cli\u003eDirect factory availability and the option for custom lengths or splicing provides flexibility for nonstandard projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 340mm length is fixed in this kit, so longer axes require additional ordering or splicing arrangements.\u003c\/li\u003e\n\u003cli\u003eBlocks are not described with heavy sealing for high-dust or wet environments, so extra protection may be needed in those conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003e340mm (13.39in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded carriages\u003c\/td\u003e\n\u003ctd\u003e2 x HGW20CA flange type carriage blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial \/ treatment\u003c\/td\u003e\n\u003ctd\u003eHigh-carbon steel, quenched and tempered\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\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis HGW20 340mm rail and HGW20CA carriage kit is a reliable, value-minded choice for hobby CNC builders and small machine shops needing precise, low-friction linear travel in a compact length. Its hardened rail, flange blocks, and four-point contact design deliver stability and interchangeability; users should plan for proper lubrication and consider custom lengths if their project exceeds the included span.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this rail be extended for longer travel?\u003c\/strong\u003e\u003cbr\u003eYes. The manufacturer supports custom lengths and splicing technology for total lengths exceeding 2950mm; contact them to arrange a splice or longer piece.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat lubrication is required?\u003c\/strong\u003e\u003cbr\u003eRegular maintenance with #46 grease is recommended to preserve smooth motion and extend service life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these blocks compatible with other 20mm series?\u003c\/strong\u003e\u003cbr\u003eYes. The HGW20 kit is interchangeable with other square 20mm linear rail series such as HGH\/HGR 20 types.\u003c\/p\u003e","brand":"Mssoomm","offers":[{"title":"Default Title","offer_id":48243756073179,"sku":"B08BJJF2J2","price":94.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61XEkdehkML._SL1500_da2b2bf9-da64-4c90-a3e3-c746141bef81.jpg?v=1776266114","url":"https:\/\/gearmusthave.com\/products\/square-linear-guideway-rail-hgw20-13-39in-rail-and-2-hgw20ca-blocks","provider":"GearMustHave","version":"1.0","type":"link"}