{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "igus-drylin-rj4jp-01-08",
 "name": "igus drylin RJ4JP-01-08 linear bearing: Ø8 bore, Ø15 × 24 mm and retaining-ring grooves",
 "kind": "modern",
 "category": "Hardware",
 "group": "Bearings, rails & motion",
 "year": null,
 "question": "What are the igus drylin RJ4JP-01-08 dimensions and groove positions?",
 "tags": [
  "igus rj4jp-01-08",
  "drylin linear bearing",
  "8 mm linear bearing",
  "polymer linear bushing",
  "lm8uu alternative"
 ],
 "aliases": [
  "igus RJ4JP-01-08",
  "drylin R RJ4JP-01-08",
  "iglidur RJ4JP-01-08",
  "igus 8mm linear bearing",
  "rj4jp-01-08 dimensions",
  "igus lm8uu replacement"
 ],
 "overall_mm": {
  "length": 24,
  "width": 15,
  "height": 15
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/igus-drylin-rj4jp-01-08/",
 "sheet_txt": "https://xemstudio.com/objects/igus-drylin-rj4jp-01-08/sheet.txt",
 "sheet": {
  "basis": "igus RJ4JP-01-08 product data (d, D, L, B, W, N).",
  "overall_mm": {
   "length": 24,
   "width": 15,
   "height": 15
  },
  "notes": [
   "Datum: axis on Z, centred on X and Y, one end face on z=0.",
   "Bore Ø8.00 (+0/+0.04 per igus), outer Ø15.00, length 24.00.",
   "Two retaining-ring grooves Ø14.30 × 1.10 wide; outer flanks 17.50 apart, symmetric: z=3.25..4.35 and 19.65..20.75.",
   "Same outside dimensions as an LM8UU / drylin R ISO 10285 series bearing.",
   "Exact nominal mm; outer-diameter tolerance is not published."
  ],
  "table": {
   "columns": [
    "dimension",
    "value (mm)"
   ],
   "rows": [
    [
     "d (bore)",
     "8.00"
    ],
    [
     "D (outer)",
     "15.00"
    ],
    [
     "L (length)",
     "24.00"
    ],
    [
     "B (groove span)",
     "17.50"
    ],
    [
     "W (groove width)",
     "1.10"
    ],
    [
     "N (groove Ø)",
     "14.30"
    ]
   ]
  }
 },
 "sheet_text": "igus drylin RJ4JP-01-08 linear bearing: Ø8 bore, Ø15 × 24 mm and retaining-ring grooves — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/igus-drylin-rj4jp-01-08/  (sheet CC BY 4.0)\nBasis: igus RJ4JP-01-08 product data (d, D, L, B, W, N).\nCatalog version: 2026-10-20\n\nOverall (mm): length 24.0, width 15.0, height 15.0\n- Datum: axis on Z, centred on X and Y, one end face on z=0.\n- Bore Ø8.00 (+0/+0.04 per igus), outer Ø15.00, length 24.00.\n- Two retaining-ring grooves Ø14.30 × 1.10 wide; outer flanks 17.50 apart, symmetric: z=3.25..4.35 and 19.65..20.75.\n- Same outside dimensions as an LM8UU / drylin R ISO 10285 series bearing.\n- Exact nominal mm; outer-diameter tolerance is not published.\n\ndimension  value (mm)\nd (bore)  8.00\nD (outer)  15.00\nL (length)  24.00\nB (groove span)  17.50\nW (groove width)  1.10\nN (groove Ø)  14.30\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- igus: drylin RJ4JP-01-08 product page — web — Publisher's page; dimensions are facts — https://www.igus.eu/product/990\n- HC Maschinentechnik: RJ4JP-01-08 bearing dimensions — web — Publisher's page; dimensions are facts — https://hc-maschinentechnik.de/RJ4JP-bearing\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/igus-drylin-rj4jp-01-08/index.json\nAPI: https://xemstudio.com/api/geometry?object=igus-drylin-rj4jp-01-08\n",
 "sources": [
  {
   "publisher": "igus",
   "title": "drylin RJ4JP-01-08 product page",
   "url": "https://www.igus.eu/product/990",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "HC Maschinentechnik",
   "title": "RJ4JP-01-08 bearing dimensions",
   "url": "https://hc-maschinentechnik.de/RJ4JP-bearing",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "lm8uu-bearing",
  "linear-shafts-h6",
  "linear-ball-bushings-lm-uu-luu",
  "retaining-rings-din-471-external",
  "pillow-block-kp08"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. 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. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "Bore",
   "exact": "Ø8.00",
   "mates": "8 mm h-tolerance linear shaft",
   "fit": "run",
   "files": "all"
  },
  {
   "feature": "Outer diameter",
   "exact": "Ø15.00 × 24.00",
   "mates": "bearing seat in a housing or carriage",
   "fit": "press",
   "files": "all"
  },
  {
   "feature": "Grooves",
   "exact": "Ø14.30 × 1.10, 17.50 span",
   "mates": "DIN 471 15 mm retaining rings",
   "fit": "designed",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "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. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "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 size is the igus RJ4JP-01-08?",
   "a": "Ø8.00 bore, Ø15.00 outside, 24.00 long."
  },
  {
   "q": "Is it the same size as an LM8UU?",
   "a": "Yes: Ø15 × 24 on an 8 mm shaft, with ring grooves Ø14.30 × 1.10 whose outer flanks are 17.50 apart."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "igus-drylin-rj4jp-01-08",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/igus-drylin-rj4jp-01-08/igus-drylin-rj4jp-01-08.step",
   "stl": "https://xemstudio.com/files/hardware/igus-drylin-rj4jp-01-08/igus-drylin-rj4jp-01-08.stl",
   "note": "igus drylin RJ4JP-01-08 linear bearing: Ø8 bore, Ø15 × 24 mm and retaining-ring grooves"
  }
 ],
 "markdown": "https://xemstudio.com/objects/igus-drylin-rj4jp-01-08/index.md"
}