{"product_id":"berserker-linear-rail-carriage-replacements-various-types","title":"BERSERKER Linear Rail Carriage Replacements (Various Types)","description":"\u003ch2\u003eBerserker Replacement Linear Rail Carriages — MGN7H \/ MGN9C \/ MGN9H \/ MGN12C \/ MGN12H | 440C Stainless, Matched Tolerance\u003c\/h2\u003e\n\n\u003cp\u003eWhen your motion system starts showing play, roughness, or inconsistent movement, the carriage is almost always the first component to wear. These are the only replacement carriages that work correctly with Berserker Class linear rails — matched to the same tight tolerances and unique rail profile that make Berserker rails the smoothest option in the 3D printer market. Drop-in replacement, zero performance compromise.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt for Berserker Rails — Not a Universal Fit\u003c\/h3\u003e\n\u003cp\u003eCommodity MGN carriages are manufactured loose enough to fit any rail from any supplier. That interchangeability comes at a direct cost to pre-load consistency, smoothness, and carriage life. Berserker rails are produced on dedicated equipment to a tighter profile than commodity suppliers can maintain at scale — which is why they outperform generic options, and why they require their own matched carriages. Fitting a generic MGN carriage to a Berserker rail results in either binding or play depending on how the tolerances stack. Neither is acceptable in a precision motion system.\u003c\/p\u003e\n\n\u003cp\u003eIf you're running Berserker rails and need a replacement carriage, this is the correct part. If you're building a new machine and haven't chosen your rails yet, \u003ca href=\"\/collections\/3d-printer-linear-rails\"\u003estart with the full Berserker rail and carriage assembly\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003e440C Stainless Steel — Rust-Proof, High-Cycle Performance\u003c\/h3\u003e\n\u003cp\u003eBoth carriage body and bearing balls are 440C stainless steel — the same material as the Berserker rail. No surface treatment, no coating that flakes or corrodes. 440C stainless is the correct choice for 3D printer enclosures, humid garages, and any environment where carbon steel rails develop rust that contaminates the bearing path and accelerates wear. Medium pre-load on every variant: firm carriage positioning under load, no free-fall, no sloppy motion at direction changes.\u003c\/p\u003e\n\n\u003ch3\u003eVariant Comparison — All Berserker Replacement Carriages\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eModel\u003c\/th\u003e\n      \u003cth\u003eRail Width\u003c\/th\u003e\n      \u003cth\u003eCarriage Type\u003c\/th\u003e\n      \u003cth\u003eBlock Length (L)\u003c\/th\u003e\n      \u003cth\u003eBlock Width (W)\u003c\/th\u003e\n      \u003cth\u003eHeight (H)\u003c\/th\u003e\n      \u003cth\u003eMounting Screw\u003c\/th\u003e\n      \u003cth\u003eHole Spacing\u003c\/th\u003e\n      \u003cth\u003eDynamic Load\u003c\/th\u003e\n      \u003cth\u003eTypical Applications\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eMGN12H\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e12mm\u003c\/td\u003e\n      \u003ctd\u003eLong — High Capacity\u003c\/td\u003e\n      \u003ctd\u003e~45mm\u003c\/td\u003e\n      \u003ctd\u003e27mm\u003c\/td\u003e\n      \u003ctd\u003e~13mm\u003c\/td\u003e\n      \u003ctd\u003eM3\u003c\/td\u003e\n      \u003ctd\u003e20 × 20mm\u003c\/td\u003e\n      \u003ctd\u003e~3.7 kN\u003c\/td\u003e\n      \u003ctd\u003e3D printers, CNC machines, laser engravers\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eMGN12C\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e12mm\u003c\/td\u003e\n      \u003ctd\u003eCompact\u003c\/td\u003e\n      \u003ctd\u003e~34mm\u003c\/td\u003e\n      \u003ctd\u003e27mm\u003c\/td\u003e\n      \u003ctd\u003e~13mm\u003c\/td\u003e\n      \u003ctd\u003eM3\u003c\/td\u003e\n      \u003ctd\u003e20 × 15mm\u003c\/td\u003e\n      \u003ctd\u003e~2.7 kN\u003c\/td\u003e\n      \u003ctd\u003eCompact motion systems, lightweight CNC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eMGN9H\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e9mm\u003c\/td\u003e\n      \u003ctd\u003eLong — High Capacity\u003c\/td\u003e\n      \u003ctd\u003e~39mm\u003c\/td\u003e\n      \u003ctd\u003e20mm\u003c\/td\u003e\n      \u003ctd\u003e~10mm\u003c\/td\u003e\n      \u003ctd\u003eM3\u003c\/td\u003e\n      \u003ctd\u003e15 × 15mm\u003c\/td\u003e\n      \u003ctd\u003e~2.2 kN\u003c\/td\u003e\n      \u003ctd\u003eSmall 3D printers, robotics, automation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eMGN9C\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e9mm\u003c\/td\u003e\n      \u003ctd\u003eCompact\u003c\/td\u003e\n      \u003ctd\u003e~28mm\u003c\/td\u003e\n      \u003ctd\u003e20mm\u003c\/td\u003e\n      \u003ctd\u003e~10mm\u003c\/td\u003e\n      \u003ctd\u003eM3\u003c\/td\u003e\n      \u003ctd\u003e15 × 10mm\u003c\/td\u003e\n      \u003ctd\u003e~1.5 kN\u003c\/td\u003e\n      \u003ctd\u003eMini CNC, light automation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eMGN7H\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e7mm\u003c\/td\u003e\n      \u003ctd\u003eLong — High Capacity\u003c\/td\u003e\n      \u003ctd\u003e~30mm\u003c\/td\u003e\n      \u003ctd\u003e17mm\u003c\/td\u003e\n      \u003ctd\u003e~8mm\u003c\/td\u003e\n      \u003ctd\u003eM2\u003c\/td\u003e\n      \u003ctd\u003e12 × 12mm\u003c\/td\u003e\n      \u003ctd\u003e~1.0 kN\u003c\/td\u003e\n      \u003ctd\u003eMiniature mechanisms, small robotics\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eQuick Selection Guide\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eIf you need\u003c\/th\u003e\n\u003cth\u003eRecommended model\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum rigidity and load capacity\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMGN12H\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e12mm rail, lighter toolhead\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMGN12C\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9mm rail, full rigidity\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMGN9H\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9mm rail, minimum weight\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMGN9C\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUltra-compact or miniature build\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMGN7H\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCarriage Type Legend\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eH (Long \/ High Capacity):\u003c\/strong\u003e longer block, larger bearing contact area, higher load rating and rigidity — the correct choice for most 3D printer X and Y axes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eC (Compact):\u003c\/strong\u003e shorter block, lighter weight, smaller footprint — use where space or mass is the primary constraint\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGeneral Features — All Models\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e440C stainless steel body and bearings — rust-proof in humid and enclosed environments\u003c\/li\u003e\n  \u003cli\u003eRecirculating steel ball bearing system — four-direction load support\u003c\/li\u003e\n  \u003cli\u003eMedium pre-load — firm carriage positioning, no free-fall under gravity\u003c\/li\u003e\n  \u003cli\u003eLow friction, smooth motion from first use\u003c\/li\u003e\n  \u003cli\u003eFunctional grease ports — shipped dry, ready for \u003ca href=\"https:\/\/west3d.com\/products\/mobil-mobilux-ep2-10ml-filled-syringe-with-blunt-tip\"\u003eMobilux EP2 lubrication\u003c\/a\u003e before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen to Replace the Carriage Instead of the Full Rail\u003c\/h3\u003e\n\u003cp\u003eCarriages accumulate more wear cycles than rails in CoreXY and bed-slinger machines — particularly on the X axis where the carriage reverses direction thousands of times per print hour. If your Berserker rail is dimensionally straight and still smooth to the touch but the carriage has developed play, roughness, or inconsistent resistance, the carriage is the worn component. Replacing the carriage alone restores full performance without the cost and realignment time of a full rail swap. It's the correct diagnostic approach before condemning a functional rail.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠ Compatibility note:\u003c\/strong\u003e All variants are exclusively compatible with their matching Berserker Class rail. MGN7H uses M2 mounting screws — verify your mount design before ordering. These carriages will not perform correctly on non-Berserker rails from other suppliers.\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":"MGN12H","offer_id":52735674188070,"sku":"MOT1740","price":11.99,"currency_code":"USD","in_stock":true},{"title":"MGN12C","offer_id":52735674220838,"sku":"BER4044MGN","price":11.49,"currency_code":"USD","in_stock":true},{"title":"MGN9H","offer_id":52735674253606,"sku":"BER2443MGN","price":8.99,"currency_code":"USD","in_stock":true},{"title":"MGN9C","offer_id":52735674286374,"sku":"BER2444MGN","price":8.99,"currency_code":"USD","in_stock":false},{"title":"MGN7H","offer_id":52735674319142,"sku":"BER2445MHN","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1004\/1986\/2822\/files\/berserker-linear-rail-carriage-replacements-various-types-west3d-3d-printing-supplies-berserker-361020.jpg?v=1773259454","url":"https:\/\/supplies3d.shop\/products\/berserker-linear-rail-carriage-replacements-various-types","provider":"SUPPLIES3D","version":"1.0","type":"link"}