{"product_id":"square-linear-guideway-rail-hgh30-77-17-in-with-2-hgh30ca-blocks","title":"Square Linear Guideway Rail HGH30-77.17 in with 2 HGH30CA Blocks","description":"\u003cp\u003eIn this review the Square Linear Guideway Rail HGH30-77.17 in kit is evaluated for CNC builders and DIY machine shops who need a long, rigid guideway with high load capacity. The bottom line is that this set pairs a 1960mm HGH30 rail with two HGH30CA square carriage blocks to deliver dependable straight-line motion and long wear life, making it a practical choice when rigidity and predictable slidability are the priority.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-length hardened rail:\u003c\/strong\u003e The 1960mm rail is made from high-carbon steel and treated with quenching and tempering to resist wear and maintain straightness under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-point contact design:\u003c\/strong\u003e Goethe-style four-point contact on the carriage distributes loads evenly in all directions, providing stable motion for heavy cuts or high-precision runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable components:\u003c\/strong\u003e Blocks and rail conform to common square linear rail sizing so they are easy to assemble and swap with other HGH30 kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable bearing steel blocks:\u003c\/strong\u003e The HGH30CA slider blocks use hardened bearing steel and extra balls for lower friction and longer service life in continuous use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-alignment:\u003c\/strong\u003e The carriage blocks can absorb minor mounting surface errors, reducing binding from imperfect assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory support and custom lengths:\u003c\/strong\u003e Direct factory operation means available customization of total length or hole spacing and splicing options for lengths beyond 2950mm.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is best for small to medium CNC machines, router tables, gantry rigs, and DIY projects where a long, square guide with strong bending resistance is needed. Builders who require a 77.17 in rail and who plan to mount heavy carriages will appreciate the load-bearing four-point contact and hardened materials.\u003c\/p\u003e\u003cp\u003eIt is less suitable for hobbyists who want fully pre-assembled, lubricated linear slides out of the box or for ultra-compact machines that need miniature rails. Also, if you need integrated lubrication fittings or specialized seals, consider a block type with those specific features.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh-carbon steel rail with heat treatment offers long-term wear resistance and strong bending resistance.\u003c\/li\u003e\n\u003cli\u003eHGH30CA blocks use quality bearing steel and additional balls for smoother, lower-friction travel.\u003c\/li\u003e\n\u003cli\u003eSelf-aligning four-point contact reduces sensitivity to minor mounting surface errors.\u003c\/li\u003e\n\u003cli\u003eFactory customization and splicing allow options for nonstandard lengths.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBlocks and rail arrive unlubricated; customers should apply appropriate grease such as #46 before heavy use.\u003c\/li\u003e\n\u003cli\u003eThe kit requires careful mounting alignment and basic mechanical skill to achieve its rated precision.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\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\u003eHGH30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRail length\u003c\/td\u003e\n\u003ctd\u003e1960mm (77.17 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded blocks\u003c\/td\u003e\n\u003ctd\u003e2 pcs HGH30CA carriage slider blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRail material\u003c\/td\u003e\n\u003ctd\u003eHigh-carbon steel, quenched and tempered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eSquare rail, Goethe-style four-point contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe HGH30 1960mm square linear guideway kit is a solid choice for builders who need a long, stiff rail and robust carriage blocks for CNC or heavy DIY motion systems. Its hardened rail, four-point contact blocks, and factory customization options make it good value for projects that demand durability and predictable linear accuracy when installed by someone comfortable with mechanical alignment and maintenance.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes the kit come lubricated?\u003c\/strong\u003e\u003cbr\u003eAnswer. The kit is shipped without heavy factory lubrication; the manufacturer recommends using #46 grease for maintenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I get a longer rail?\u003c\/strong\u003e\u003cbr\u003eAnswer. Yes, the seller offers custom lengths and a splicing method for lengths exceeding 2950mm; contact them for options.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre these blocks compatible with other HGH30 rails?\u003c\/strong\u003e\u003cbr\u003eAnswer. Yes, the HGH30CA blocks are designed to be interchangeable with standard square HGH30 linear rails.\u003c\/p\u003e","brand":"Mssoomm","offers":[{"title":"Default Title","offer_id":48190086250715,"sku":"B08C7DQ18L","price":375.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61lk5HFFGNL._SL1500_baaa1d84-a3eb-4e7b-827d-553d962fa8ed.jpg?v=1769595024","url":"https:\/\/gearmusthave.com\/products\/square-linear-guideway-rail-hgh30-77-17-in-with-2-hgh30ca-blocks","provider":"GearMustHave","version":"1.0","type":"link"}