{
 "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": "lm8uu-linear-bearing",
 "name": "LM8UU linear bearing and 8 mm rod",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What are the LM8UU bearing dimensions and the housing bore?",
 "tags": [
  "bearing",
  "linear",
  "rod",
  "3d printer"
 ],
 "aliases": [
  "lm8uu",
  "8mm linear bearing",
  "8mm rod",
  "linear rail bearing"
 ],
 "overall_mm": {
  "length": 24,
  "width": 15,
  "height": 15
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 2,
 "url": "https://xemstudio.com/objects/lm8uu-linear-bearing/",
 "sheet_txt": "https://xemstudio.com/objects/lm8uu-linear-bearing/sheet.txt",
 "sheet": {
  "basis": "industry standard (ISO 10285 style)",
  "overall_mm": {
   "length": 24,
   "width": 15,
   "height": 15
  },
  "notes": [
   "Bore 8 mm, OD 15 mm, length 24 mm; two retaining-ring grooves. LM8LUU is 45 mm long. LM10UU is 10 × 19 × 29, LM12UU 12 × 21 × 30.",
   "Printed housing: Ø15.2–15.3 mm; clamp-style housings hold better than a straight press."
  ]
 },
 "sheet_text": "LM8UU linear bearing and 8 mm rod — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/lm8uu-linear-bearing/  (CC BY 4.0)\nBasis: industry standard (ISO 10285 style)\nCatalog version: 2026-10-20\n\nOverall (mm): length 24, width 15, height 15\n- Bore 8 mm, OD 15 mm, length 24 mm; two retaining-ring grooves. LM8LUU is 45 mm long. LM10UU is 10 × 19 × 29, LM12UU 12 × 21 × 30.\n- Printed housing: Ø15.2–15.3 mm; clamp-style housings hold better than a straight press.\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- McMaster-Carr: Linear ball bearings (free STEP/IGES/STL per part, for your own design use; no redistribution) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/linear-bearings/\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, 2 parts): https://xemstudio.com/files/hardware/lm8uu-linear-bearing/index.json\nAPI: https://xemstudio.com/api/geometry?object=lm8uu-linear-bearing\n",
 "sources": [
  {
   "publisher": "McMaster-Carr",
   "title": "Linear ball bearings (free STEP/IGES/STL per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/linear-bearings/",
   "formats": [
    "STEP",
    "IGES",
    "STL",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "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": [
  "nema-17-stepper",
  "2020-extrusion",
  "socket-head-cap-screws-metric"
 ],
 "faq": [
  {
   "q": "What are LM8UU bearing dimensions?",
   "a": "8 mm bore, 15 mm OD, 24 mm long, two retaining-ring grooves. LM8LUU is the 45 mm long version."
  },
  {
   "q": "What hole size for an LM8UU in a 3D printed housing?",
   "a": "15.2–15.3 mm; a clamp-style housing with a slot and screw holds better than a straight press fit."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "lm8uu",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lm8uu-linear-bearing/lm8uu.step",
   "stl": "https://xemstudio.com/files/hardware/lm8uu-linear-bearing/lm8uu.stl",
   "note": "LM8UU envelope with ring grooves"
  },
  {
   "file": "rod-8x300",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lm8uu-linear-bearing/rod-8x300.step",
   "stl": "https://xemstudio.com/files/hardware/lm8uu-linear-bearing/rod-8x300.stl",
   "note": "8 mm rod, 300 mm"
  }
 ],
 "markdown": "https://xemstudio.com/objects/lm8uu-linear-bearing/index.md"
}