{
 "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": "shaft-collars-clips-and-shafts",
 "name": "Shafts, D-flats, set-screw collars, E-clips (DIN 6799) and circlips (DIN 471)",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What groove does an E-clip for a 5 mm shaft need?",
 "tags": [
  "shaft",
  "collar",
  "e-clip",
  "circlip",
  "retaining ring",
  "d-shaft",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "e clip groove dimensions",
  "din 6799",
  "circlip groove size 8mm",
  "din 471",
  "shaft collar 5mm",
  "d shaft 5mm",
  "retaining ring groove",
  "precision shaft 8mm"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 32,
 "url": "https://xemstudio.com/objects/shaft-collars-clips-and-shafts/",
 "sheet_txt": "https://xemstudio.com/objects/shaft-collars-clips-and-shafts/sheet.txt",
 "sheet": {
  "basis": "DIN 6799 E-clip and DIN 471 circlip groove dimensions; set-screw collar envelopes typical of metric catalogue parts; h6 precision rod",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "E-clip grooves (DIN 6799), shaft → groove Ø × width: 2 → 1.4 × 0.4; 3 → 2.3 × 0.5; 4 → 3.2 × 0.7; 5 → 4.0 × 0.7; 6 → 5.0 × 0.7; 8 → 6.0 × 0.9; 10 → 8.0 × 1.1 mm. Circlip grooves (DIN 471): 5 → 4.8 × 0.7; 6 → 5.7 × 0.8; 8 → 7.6 × 0.9; 10 → 9.6 × 1.1; 12 → 11.5 × 1.1; 15 → 14.3 × 1.1; 20 → 19.0 × 1.3 mm.",
   "Set-screw collars: Ø3 bore 8 OD × 5; Ø5 10 × 6; Ø6 12 × 7; Ø8 16 × 8; Ø10 20 × 10; Ø12 22 × 10 (M3/M4/M5 screws). A collar each side of a bearing locates a shaft axially; a printed collar in PETG with an M3 holds a 5 mm shaft for light duty.",
   "D-flat: 0.4 × d deep (5 mm shaft → 2 mm flat, leaving 3 mm), 20 mm long; a set screw seats on it. Precision rod is h6 (5 mm: 5.000/4.992); a printed Ø5.2 hole is a running fit, Ø4.9 press.",
   "LES: Ø8 flywheel shafts in 608s with circlip grooves; Ø5 crank shafts in 625s with E-clips; collars where a clip groove is too much work."
  ],
  "table": {
   "columns": [
    "item",
    "shaft_mm",
    "groove_dia_mm",
    "groove_w_mm",
    "collar_od_x_w"
   ],
   "rows": [
    [
     "E-clip",
     2,
     1.4,
     0.4,
     ""
    ],
    [
     "E-clip",
     3,
     2.3,
     0.5,
     ""
    ],
    [
     "E-clip",
     4,
     3.2,
     0.7,
     ""
    ],
    [
     "E-clip",
     5,
     4,
     0.7,
     ""
    ],
    [
     "E-clip",
     6,
     5,
     0.7,
     ""
    ],
    [
     "E-clip",
     8,
     6,
     0.9,
     ""
    ],
    [
     "E-clip",
     10,
     8,
     1.1,
     ""
    ],
    [
     "circlip",
     4,
     3.8,
     0.5,
     ""
    ],
    [
     "circlip",
     5,
     4.8,
     0.7,
     ""
    ],
    [
     "circlip",
     6,
     5.7,
     0.8,
     ""
    ],
    [
     "circlip",
     8,
     7.6,
     0.9,
     ""
    ],
    [
     "circlip",
     10,
     9.6,
     1.1,
     ""
    ],
    [
     "circlip",
     12,
     11.5,
     1.1,
     ""
    ],
    [
     "circlip",
     15,
     14.3,
     1.1,
     ""
    ],
    [
     "circlip",
     20,
     19,
     1.3,
     ""
    ],
    [
     "collar",
     3,
     "",
     "",
     "8 × 5, M3"
    ],
    [
     "collar",
     4,
     "",
     "",
     "9 × 5, M3"
    ],
    [
     "collar",
     5,
     "",
     "",
     "10 × 6, M3"
    ],
    [
     "collar",
     6,
     "",
     "",
     "12 × 7, M3"
    ],
    [
     "collar",
     8,
     "",
     "",
     "16 × 8, M4"
    ],
    [
     "collar",
     10,
     "",
     "",
     "20 × 10, M4"
    ],
    [
     "collar",
     12,
     "",
     "",
     "22 × 10, M5"
    ]
   ]
  }
 },
 "sheet_text": "Shafts, D-flats, set-screw collars, E-clips (DIN 6799) and circlips (DIN 471) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/shaft-collars-clips-and-shafts/  (CC BY 4.0)\nBasis: DIN 6799 E-clip and DIN 471 circlip groove dimensions; set-screw collar envelopes typical of metric catalogue parts; h6 precision rod\nCatalog version: 2026-10-20\n\nSizes: see table below\n- E-clip grooves (DIN 6799), shaft → groove Ø × width: 2 → 1.4 × 0.4; 3 → 2.3 × 0.5; 4 → 3.2 × 0.7; 5 → 4.0 × 0.7; 6 → 5.0 × 0.7; 8 → 6.0 × 0.9; 10 → 8.0 × 1.1 mm. Circlip grooves (DIN 471): 5 → 4.8 × 0.7; 6 → 5.7 × 0.8; 8 → 7.6 × 0.9; 10 → 9.6 × 1.1; 12 → 11.5 × 1.1; 15 → 14.3 × 1.1; 20 → 19.0 × 1.3 mm.\n- Set-screw collars: Ø3 bore 8 OD × 5; Ø5 10 × 6; Ø6 12 × 7; Ø8 16 × 8; Ø10 20 × 10; Ø12 22 × 10 (M3/M4/M5 screws). A collar each side of a bearing locates a shaft axially; a printed collar in PETG with an M3 holds a 5 mm shaft for light duty.\n- D-flat: 0.4 × d deep (5 mm shaft → 2 mm flat, leaving 3 mm), 20 mm long; a set screw seats on it. Precision rod is h6 (5 mm: 5.000/4.992); a printed Ø5.2 hole is a running fit, Ø4.9 press.\n- LES: Ø8 flywheel shafts in 608s with circlip grooves; Ø5 crank shafts in 625s with E-clips; collars where a clip groove is too much work.\n\nitem  shaft_mm  groove_dia_mm  groove_w_mm  collar_od_x_w\nE-clip  2  1.4  0.4  \nE-clip  3  2.3  0.5  \nE-clip  4  3.2  0.7  \nE-clip  5  4.0  0.7  \nE-clip  6  5.0  0.7  \nE-clip  8  6.0  0.9  \nE-clip  10  8.0  1.1  \ncirclip  4  3.8  0.5  \ncirclip  5  4.8  0.7  \ncirclip  6  5.7  0.8  \ncirclip  8  7.6  0.9  \ncirclip  10  9.6  1.1  \ncirclip  12  11.5  1.1  \ncirclip  15  14.3  1.1  \ncirclip  20  19.0  1.3  \ncollar  3      8 × 5, M3\ncollar  4      9 × 5, M3\ncollar  5      10 × 6, M3\ncollar  6      12 × 7, M3\ncollar  8      16 × 8, M4\ncollar  10      20 × 10, M4\ncollar  12      22 × 10, M5\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, 32 parts): https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/index.json\nAPI: https://xemstudio.com/api/geometry?object=shaft-collars-clips-and-shafts\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": [
  "ball-bearings-metric",
  "608-bearing",
  "set-screws-metric",
  "bearing-housings-and-rod-supports",
  "crank-conrod-flywheel-kit",
  "dowel-pins-metric"
 ],
 "faq": [
  {
   "q": "What groove size for an E-clip on a 5 mm shaft?",
   "a": "Ø4.0 mm groove, 0.7 mm wide (DIN 6799 size 4). For a 3 mm shaft: Ø2.3 × 0.5; 8 mm: Ø6.0 × 0.9."
  },
  {
   "q": "What is the circlip groove for an 8 mm shaft?",
   "a": "DIN 471: Ø7.6 mm, 0.9 mm wide; the clip is 0.8 mm thick. 10 mm shaft: Ø9.6 × 1.1."
  },
  {
   "q": "How deep is a D-flat on a 5 mm shaft?",
   "a": "Usually 0.4 × d = 2 mm deep (3 mm remaining), 15–25 mm long; set screws seat on it so the pulley can't spin."
  },
  {
   "q": "What size shaft collar for an 8 mm shaft?",
   "a": "16 mm OD, 8 mm wide, M4 set screw (typical metric catalogue size); the 5 mm collar is 10 × 6 with an M3."
  }
 ],
 "files_license": null,
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  {
   "file": "collar-3mm",
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   "note": "set-screw shaft collar Ø3 bore, OD 8, 5 wide, M3"
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   "note": "set-screw shaft collar Ø4 bore, OD 9, 5 wide, M3"
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   "note": "set-screw shaft collar Ø5 bore, OD 10, 6 wide, M3"
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   "note": "set-screw shaft collar Ø6 bore, OD 12, 7 wide, M3"
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   "note": "set-screw shaft collar Ø8 bore, OD 16, 8 wide, M4"
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   "note": "DIN 6799 E-clip for Ø2 shaft: groove Ø1.4 × 0.4 wide"
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   "note": "DIN 6799 E-clip for Ø3 shaft: groove Ø2.3 × 0.5 wide"
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   "note": "DIN 6799 E-clip for Ø4 shaft: groove Ø3.2 × 0.7 wide"
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   "note": "DIN 6799 E-clip for Ø5 shaft: groove Ø4.0 × 0.7 wide"
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   "note": "DIN 6799 E-clip for Ø6 shaft: groove Ø5.0 × 0.7 wide"
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   "note": "DIN 6799 E-clip for Ø8 shaft: groove Ø6.0 × 0.9 wide"
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   "note": "DIN 6799 E-clip for Ø10 shaft: groove Ø8.0 × 1.1 wide"
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   "note": "DIN 471 external circlip for Ø4 shaft: groove Ø3.8 × 0.5 wide"
  },
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   "note": "DIN 471 external circlip for Ø5 shaft: groove Ø4.8 × 0.7 wide"
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   "note": "DIN 471 external circlip for Ø6 shaft: groove Ø5.7 × 0.8 wide"
  },
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   "note": "DIN 471 external circlip for Ø8 shaft: groove Ø7.6 × 0.9 wide"
  },
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   "note": "DIN 471 external circlip for Ø10 shaft: groove Ø9.6 × 1.1 wide"
  },
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   "note": "DIN 471 external circlip for Ø12 shaft: groove Ø11.5 × 1.1 wide"
  },
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   "file": "circlip-15mm",
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   "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"
  },
  {
   "file": "shaft-3x100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-3x100.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-3x100.stl",
   "note": "precision shaft Ø3 × 100"
  },
  {
   "file": "shaft-4x100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-4x100.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-4x100.stl",
   "note": "precision shaft Ø4 × 100"
  },
  {
   "file": "shaft-5x100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x100.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x100.stl",
   "note": "precision shaft Ø5 × 100 with 20 mm D-flat (0.4 d deep)"
  },
  {
   "file": "shaft-5x200",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x200.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x200.stl",
   "note": "precision shaft Ø5 × 200 with 20 mm D-flat (0.4 d deep)"
  },
  {
   "file": "shaft-6x150",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-6x150.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-6x150.stl",
   "note": "precision shaft Ø6 × 150 with 20 mm D-flat (0.4 d deep)"
  },
  {
   "file": "shaft-8x200",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x200.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x200.stl",
   "note": "precision shaft Ø8 × 200 with 20 mm D-flat (0.4 d deep)"
  },
  {
   "file": "shaft-8x300",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x300.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x300.stl",
   "note": "precision shaft Ø8 × 300 with 20 mm D-flat (0.4 d deep)"
  },
  {
   "file": "shaft-10x200",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-10x200.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-10x200.stl",
   "note": "precision shaft Ø10 × 200"
  },
  {
   "file": "shaft-8x100-grooved",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x100-grooved.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x100-grooved.stl",
   "note": "Ø8 × 100 with DIN 471 circlip grooves at 10 and 88 mm and a D-flat"
  },
  {
   "file": "shaft-5x80-grooved",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x80-grooved.step",
   "stl": "https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x80-grooved.stl",
   "note": "Ø5 × 80 with DIN 6799 E-clip grooves at 8 and 70 mm and a D-flat"
  }
 ],
 "markdown": "https://xemstudio.com/objects/shaft-collars-clips-and-shafts/index.md"
}