{"product_id":"berserker-mgn7h-150-200-220-230-250-linear-rails-viking-skis-with-carriages","title":"BERSERKER MGN7H-150 \/ 200 \/ 220 \/ 230 \/ 250 Linear Rails Viking Skis with Carriages","description":"\u003ch2\u003eBerserker MGN[SIZE] Linear Rails — 440C Stainless Steel, Medium Pre-Load | West3D\u003c\/h2\u003e\n\n\u003cp\u003eBerserker linear rails are West3D's house brand MGN rails — 440C stainless steel, medium pre-load, produced on dedicated equipment for uniform consistency across every carriage. Butter smooth, rust-proof even in humid environments, and shipped dry with functioning grease ports ready for lubrication. The best value for smoothness, consistency, and price in the current market, tested against dozens of competing options before landing here.\u003c\/p\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0596\/0692\/5480\/files\/Berserker_480x480.png?v=1656616949\" alt=\"Berserker MGN linear rails 440C stainless steel West3D\" style=\"width:100%;height:auto;\"\u003e\n\n\u003ch3\u003e440C Stainless Steel — No Rust, No Compromise\u003c\/h3\u003e\n\u003cp\u003eMost budget MGN rails are made from carbon steel with a surface treatment that corrodes in humid environments. Berserker rails use 440C stainless steel throughout — both rail body and bearings — which does not rust regardless of ambient humidity. If you're printing in a garage, basement, or enclosed chamber environment where moisture is a concern, 440C is the correct material choice.\u003c\/p\u003e\n\n\u003ch3\u003eMedium Pre-Load — Why It Matters\u003c\/h3\u003e\n\u003cp\u003ePre-load is the interference fit between the carriage ball bearings and the rail raceway. Low and zero pre-load rails — the cheap, abundant options flooding the market — will free-fall under their own weight and introduce play that shows up as inconsistency in your prints. Medium pre-load eliminates that play and holds the carriage firmly in position under load, which requires tighter manufacturing tolerances and higher-quality steel to execute properly. Berserker rails are medium pre-load: firm, consistent, and smooth.\u003c\/p\u003e\n\n\u003ch3\u003eDedicated Production Equipment\u003c\/h3\u003e\n\u003cp\u003eThese rails are produced on equipment reserved exclusively for Berserker rail manufacture — not distributed across general production runs. The result is uniformity that's measurably better than rails produced on shared equipment where tolerances drift across batches.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRail Profile\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMGN[SIZE]H\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Lengths\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e[LENGTH OPTIONS]mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e440C stainless steel — rail and bearings\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePre-Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGrease Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes — functional, shipped dry\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRust Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes — 440C stainless, no surface treatment required\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended Lubricant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/west3d.com\/products\/mobil-mobilux-ep2-10ml-filled-syringe-with-blunt-tip\"\u003eMobilux EP2 in syringe\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eLubrication\u003c\/h3\u003e\n\u003cp\u003eBerserker rails ship dry with fully functioning grease ports. Apply \u003ca href=\"https:\/\/west3d.com\/products\/mobil-mobilux-ep2-10ml-filled-syringe-with-blunt-tip\"\u003eMobilux EP2 via the included grease port\u003c\/a\u003e before first use and after extended periods of operation. Mobilux EP2 is the community-standard lubricant for MGN rails in Voron and Klipper builds — it provides the correct viscosity for linear bearing applications without attracting debris or drying out quickly.\u003c\/p\u003e\n\n\u003cp\u003e→ Browse all \u003ca href=\"\/collections\/3d-printer-linear-rails\"\u003e3D Printer Linear Rails\u003c\/a\u003e or explore our full \u003ca href=\"\/collections\/3d-printer-upgrades\"\u003e3D Printer Upgrades\u003c\/a\u003e collection.\u003c\/p\u003e","brand":"West3D 3D Printing Supplies","offers":[{"title":"150mm","offer_id":52735674351910,"sku":"BER1085","price":16.99,"currency_code":"USD","in_stock":true},{"title":"200mm","offer_id":52735674384678,"sku":"BER1086","price":20.46,"currency_code":"USD","in_stock":true},{"title":"220mm","offer_id":52735674417446,"sku":"BER1087","price":20.49,"currency_code":"USD","in_stock":true},{"title":"230mm","offer_id":52735674450214,"sku":"BER1088","price":21.49,"currency_code":"USD","in_stock":true},{"title":"250mm","offer_id":52735674482982,"sku":"BER1089","price":22.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1004\/1986\/2822\/files\/berserker-mgn7h-150-200-220-230-250-linear-rails-viking-skis-with-carriages-west3d-printing-berserker-383940.jpg?v=1773259454","url":"https:\/\/supplies3d.shop\/products\/berserker-mgn7h-150-200-220-230-250-linear-rails-viking-skis-with-carriages","provider":"SUPPLIES3D","version":"1.0","type":"link"}