{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "mgn-carriages",
 "name": "MGN9C/H, MGN12C/H and MGN15H carriages",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What are MGN12H carriage dimensions and mounting holes?",
 "tags": [
  "carriage",
  "mgn",
  "linear rail",
  "linear guide",
  "block"
 ],
 "aliases": [
  "mgn12h",
  "mgn12c dimensions",
  "mgn9h carriage",
  "mgn15h hole pattern",
  "linear rail carriage step"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 5,
 "url": "https://xemstudio.com/objects/mgn-carriages/",
 "sheet_txt": "https://xemstudio.com/objects/mgn-carriages/sheet.txt",
 "sheet": {
  "basis": "HIWIN MGN catalogue carriage envelope (L × W × H, H1) and mounting pattern",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Block envelopes with the rail channel at the exact rail section. The block's underside sits H1 above the rail bottom (MGN9 2.0, MGN12 3.0, MGN15 4.0), so the file's block height is H − H1: 8, 10, 12.",
   "Assembled height H from the rail bottom: MGN9 10, MGN12 13, MGN15 16.",
   "Four M3 holes, drawn at Ø3 (thread major), across × along the rail: MGN9H 15 × 16, MGN9C 15 × 10, MGN12H 20 × 20, MGN12C 20 × 15, MGN15H 25 × 25.",
   "C is the short block, H the long one; same width and height."
  ],
  "table": {
   "columns": [
    "carriage",
    "L",
    "W",
    "H assembled",
    "block height",
    "holes across × along"
   ],
   "rows": [
    [
     "MGN9C",
     28.9,
     20,
     10,
     8,
     "15 × 10"
    ],
    [
     "MGN9H",
     39.9,
     20,
     10,
     8,
     "15 × 16"
    ],
    [
     "MGN12C",
     34.7,
     27,
     13,
     10,
     "20 × 15"
    ],
    [
     "MGN12H",
     45.4,
     27,
     13,
     10,
     "20 × 20"
    ],
    [
     "MGN15H",
     58.8,
     32,
     16,
     12,
     "25 × 25"
    ]
   ]
  }
 },
 "sheet_text": "MGN9C/H, MGN12C/H and MGN15H carriages — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/mgn-carriages/  (CC BY 4.0)\nBasis: HIWIN MGN catalogue carriage envelope (L × W × H, H1) and mounting pattern\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Block envelopes with the rail channel at the exact rail section. The block's underside sits H1 above the rail bottom (MGN9 2.0, MGN12 3.0, MGN15 4.0), so the file's block height is H − H1: 8, 10, 12.\n- Assembled height H from the rail bottom: MGN9 10, MGN12 13, MGN15 16.\n- Four M3 holes, drawn at Ø3 (thread major), across × along the rail: MGN9H 15 × 16, MGN9C 15 × 10, MGN12H 20 × 20, MGN12C 20 × 15, MGN15H 25 × 25.\n- C is the short block, H the long one; same width and height.\n\ncarriage  L  W  H assembled  block height  holes across × along\nMGN9C  28.9  20  10  8  15 × 10\nMGN9H  39.9  20  10  8  15 × 16\nMGN12C  34.7  27  13  10  20 × 15\nMGN12H  45.4  27  13  10  20 × 20\nMGN15H  58.8  32  16  12  25 × 25\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- HIWIN: MGN series linear guideway catalogue — PDF, STEP — HIWIN site terms [verify license at link] — https://www.hiwin.com/en/products/linear-guideways/mgn-mgw-series\n- Wikipedia: Linear-motion bearing — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Linear-motion_bearing\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/mgn-carriages/index.json\nAPI: https://xemstudio.com/api/geometry?object=mgn-carriages\n",
 "sources": [
  {
   "publisher": "HIWIN",
   "title": "MGN series linear guideway catalogue",
   "url": "https://www.hiwin.com/en/products/linear-guideways/mgn-mgw-series",
   "formats": [
    "PDF",
    "STEP"
   ],
   "license": "HIWIN site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Linear-motion bearing",
   "url": "https://en.wikipedia.org/wiki/Linear-motion_bearing",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "mgn-rails",
  "socket-head-cap-screws-metric",
  "t8-nut",
  "slide-block-sc8uu"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "mgn-rails",
     "why": "channel on the rail section"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "slide-block-sc8uu",
     "why": "LM8UU block on an 8 mm rod"
    }
   ]
  },
  {
   "role": "Also needed",
   "items": [
    {
     "slug": "socket-head-cap-screws-metric",
     "why": "4 × M3"
    }
   ]
  }
 ],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [
  {
   "feature": "rail holes",
   "exact": "Ø3.5 through, counterbore Ø6 × 3.5 (MGN9) / 4.5",
   "mates": "M3 socket head screws",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "carriage holes",
   "exact": "M3 (Ø3 major)",
   "mates": "M3 screws",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "rail section",
   "exact": "9 × 6.5 / 12 × 8 / 15 × 10",
   "mates": "carriage channel",
   "fit": "designed",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. Typical FDM: hole +0.0 to +0.1 mm on diameter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. Typical FDM: +0.2 mm.",
  "run": "turns or slides in use: pin in a link, rod through a guide. Typical FDM: +0.3 mm.",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. Typical FDM: +0.3 mm.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What are MGN12H carriage dimensions?",
   "a": "45.4 long, 27 wide, 13 high from the rail bottom; four M3 on 20 × 20."
  },
  {
   "q": "MGN12C vs MGN12H?",
   "a": "Same width and height; C is 34.7 long with holes 20 × 15, H is 45.4 long with holes 20 × 20."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "mgn9h-carriage",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn9h-carriage.step",
   "stl": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn9h-carriage.stl",
   "note": "MGN9H carriage envelope 39.9 × 20 × 10 (H from rail bottom), 4 × M3 on 15 across × 16 along"
  },
  {
   "file": "mgn9c-carriage",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn9c-carriage.step",
   "stl": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn9c-carriage.stl",
   "note": "MGN9C carriage envelope 28.9 × 20 × 10 (H from rail bottom), 4 × M3 on 15 across × 10 along"
  },
  {
   "file": "mgn12h-carriage",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn12h-carriage.step",
   "stl": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn12h-carriage.stl",
   "note": "MGN12H carriage envelope 45.4 × 27 × 13 (H from rail bottom), 4 × M3 on 20 across × 20 along"
  },
  {
   "file": "mgn12c-carriage",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn12c-carriage.step",
   "stl": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn12c-carriage.stl",
   "note": "MGN12C carriage envelope 34.7 × 27 × 13 (H from rail bottom), 4 × M3 on 20 across × 15 along"
  },
  {
   "file": "mgn15h-carriage",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn15h-carriage.step",
   "stl": "https://xemstudio.com/files/hardware/mgn-linear-rails/mgn15h-carriage.stl",
   "note": "MGN15H carriage envelope 58.8 × 32 × 16 (H from rail bottom), 4 × M3 on 25 across × 25 along"
  }
 ],
 "markdown": "https://xemstudio.com/objects/mgn-carriages/index.md"
}