{
 "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": "circlips-din-471",
 "name": "External circlips DIN 471 for Ø4 to Ø20 shafts",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What is the circlip groove for an 8 mm shaft?",
 "tags": [
  "circlip",
  "din 471",
  "retaining ring",
  "snap ring",
  "shaft groove",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "circlip groove size 8mm",
  "din 471",
  "external circlip dimensions",
  "snap ring groove",
  "circlip 10mm"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 8,
 "url": "https://xemstudio.com/objects/circlips-din-471/",
 "sheet_txt": "https://xemstudio.com/objects/circlips-din-471/sheet.txt",
 "sheet": {
  "basis": "DIN 471 external retaining rings: groove Ø and width per shaft Ø; ring thickness per the standard",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "An open ring that springs into a shaft groove, with two lugs (Ø3.2, Ø1.4 holes) either side of the gap. The ring bore is the groove Ø; its OD is 1.9 × the shaft Ø and the gap is 0.35 × the groove Ø.",
   "Groove Ø × width (ring thickness) by shaft: 4 → 3.8 × 0.5 (0.4); 5 → 4.8 × 0.7 (0.6); 6 → 5.7 × 0.8 (0.7); 8 → 7.6 × 0.9 (0.8); 10 → 9.6 × 1.1 (1.0); 12 → 11.5 × 1.1 (1.0); 15 → 14.3 × 1.1 (1.0); 20 → 19.0 × 1.3 (1.2).",
   "The groove itself is drawn on shaft-8x100-grooved (Ø7.6 × 0.9)."
  ],
  "table": {
   "columns": [
    "file",
    "shaft Ø",
    "groove Ø",
    "groove width",
    "ring thickness",
    "ring OD"
   ],
   "rows": [
    [
     "circlip-4mm",
     4,
     3.8,
     0.5,
     0.4,
     7.6
    ],
    [
     "circlip-5mm",
     5,
     4.8,
     0.7,
     0.6,
     9.5
    ],
    [
     "circlip-6mm",
     6,
     5.7,
     0.8,
     0.7,
     11.4
    ],
    [
     "circlip-8mm",
     8,
     7.6,
     0.9,
     0.8,
     15.2
    ],
    [
     "circlip-10mm",
     10,
     9.6,
     1.1,
     1,
     19
    ],
    [
     "circlip-12mm",
     12,
     11.5,
     1.1,
     1,
     22.8
    ],
    [
     "circlip-15mm",
     15,
     14.3,
     1.1,
     1,
     28.5
    ],
    [
     "circlip-20mm",
     20,
     19,
     1.3,
     1.2,
     38
    ]
   ]
  }
 },
 "sheet_text": "External circlips DIN 471 for Ø4 to Ø20 shafts — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/circlips-din-471/  (CC BY 4.0)\nBasis: DIN 471 external retaining rings: groove Ø and width per shaft Ø; ring thickness per the standard\nCatalog version: 2026-10-20\n\nSizes: see table below\n- An open ring that springs into a shaft groove, with two lugs (Ø3.2, Ø1.4 holes) either side of the gap. The ring bore is the groove Ø; its OD is 1.9 × the shaft Ø and the gap is 0.35 × the groove Ø.\n- Groove Ø × width (ring thickness) by shaft: 4 → 3.8 × 0.5 (0.4); 5 → 4.8 × 0.7 (0.6); 6 → 5.7 × 0.8 (0.7); 8 → 7.6 × 0.9 (0.8); 10 → 9.6 × 1.1 (1.0); 12 → 11.5 × 1.1 (1.0); 15 → 14.3 × 1.1 (1.0); 20 → 19.0 × 1.3 (1.2).\n- The groove itself is drawn on shaft-8x100-grooved (Ø7.6 × 0.9).\n\nfile  shaft Ø  groove Ø  groove width  ring thickness  ring OD\ncirclip-4mm  4  3.8  0.5  0.4  7.6\ncirclip-5mm  5  4.8  0.7  0.6  9.5\ncirclip-6mm  6  5.7  0.8  0.7  11.4\ncirclip-8mm  8  7.6  0.9  0.8  15.2\ncirclip-10mm  10  9.6  1.1  1.0  19.0\ncirclip-12mm  12  11.5  1.1  1.0  22.8\ncirclip-15mm  15  14.3  1.1  1.0  28.5\ncirclip-20mm  20  19.0  1.3  1.2  38.0\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Circlip — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Circlip\n- Wikipedia: Retaining ring — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Retaining_ring\n- McMaster-Carr: Shaft collars (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/shaft-collars/\n- McMaster-Carr: Retaining rings (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/retaining-rings/\n- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 8 parts): https://xemstudio.com/files/hardware/circlips-din-471/index.json\nAPI: https://xemstudio.com/api/geometry?object=circlips-din-471\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Circlip",
   "url": "https://en.wikipedia.org/wiki/Circlip",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Retaining ring",
   "url": "https://en.wikipedia.org/wiki/Retaining_ring",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Shaft collars (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/shaft-collars/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Retaining rings (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/retaining-rings/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine and rig builds",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "web",
    "video"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "metric-shafts",
  "e-clips-din-6799",
  "shaft-collars",
  "608-bearing"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "metric-shafts",
     "why": "groove on shaft-8x100-grooved (Ø7.6 × 0.9)"
    }
   ]
  },
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "608-bearing",
     "why": "holds the 608 on the Ø8 shaft"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "e-clips-din-6799",
     "why": "side-fitting clip"
    }
   ]
  }
 ],
 "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": "circlip bore",
   "exact": "groove Ø (DIN 471)",
   "mates": "shaft groove",
   "fit": "designed",
   "files": "circlip-"
  }
 ],
 "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 is the circlip groove for an 8 mm shaft?",
   "a": "DIN 471: Ø7.6, 0.9 wide; the ring is 0.8 thick."
  },
  {
   "q": "What is the circlip groove for a 10 mm shaft?",
   "a": "Ø9.6 × 1.1; ring 1.0 thick."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "circlip-4mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-4mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-4mm.stl",
   "note": "DIN 471 external circlip for Ø4 shaft: groove Ø3.8 × 0.5 wide"
  },
  {
   "file": "circlip-5mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-5mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-5mm.stl",
   "note": "DIN 471 external circlip for Ø5 shaft: groove Ø4.8 × 0.7 wide"
  },
  {
   "file": "circlip-6mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-6mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-6mm.stl",
   "note": "DIN 471 external circlip for Ø6 shaft: groove Ø5.7 × 0.8 wide"
  },
  {
   "file": "circlip-8mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-8mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-8mm.stl",
   "note": "DIN 471 external circlip for Ø8 shaft: groove Ø7.6 × 0.9 wide"
  },
  {
   "file": "circlip-10mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-10mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-10mm.stl",
   "note": "DIN 471 external circlip for Ø10 shaft: groove Ø9.6 × 1.1 wide"
  },
  {
   "file": "circlip-12mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-12mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-12mm.stl",
   "note": "DIN 471 external circlip for Ø12 shaft: groove Ø11.5 × 1.1 wide"
  },
  {
   "file": "circlip-15mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-15mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-15mm.stl",
   "note": "DIN 471 external circlip for Ø15 shaft: groove Ø14.3 × 1.1 wide"
  },
  {
   "file": "circlip-20mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-20mm.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/circlip-20mm.stl",
   "note": "DIN 471 external circlip for Ø20 shaft: groove Ø19.0 × 1.3 wide"
  }
 ],
 "markdown": "https://xemstudio.com/objects/circlips-din-471/index.md"
}