{
 "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": "parallel-keys-din-6885",
 "name": "Parallel keys DIN 6885 form A: 2 × 2 to 18 × 11, with keyway depths",
 "kind": "standard",
 "category": "Hardware",
 "group": "Mechanisms & linkages",
 "year": null,
 "question": "What key size goes on a 20 mm shaft?",
 "tags": [
  "key",
  "keyway",
  "din 6885",
  "shaft key"
 ],
 "aliases": [
  "din 6885 key size chart",
  "keyway dimensions metric",
  "20mm shaft key size",
  "parallel key cad"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 150,
 "url": "https://xemstudio.com/objects/parallel-keys-din-6885/",
 "sheet_txt": "https://xemstudio.com/objects/parallel-keys-din-6885/sheet.txt",
 "sheet": {
  "basis": "DIN 6885-1 parallel keys and keyways: key b × h by shaft diameter, shaft keyway depth t1, hub keyway depth t2, standard lengths",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Form A: both ends round (radius b/2), for end-milled keyways. Keyway width = b; cut t1 into the shaft and t2 into the hub."
  ],
  "table": {
   "columns": [
    "shaft_mm",
    "key_b_x_h",
    "shaft_depth_t1",
    "hub_depth_t2",
    "lengths_mm"
   ],
   "rows": [
    [
     "6–8",
     "2 × 2",
     1.2,
     1,
     "6–20"
    ],
    [
     "8–10",
     "3 × 3",
     1.8,
     1.4,
     "6–36"
    ],
    [
     "10–12",
     "4 × 4",
     2.5,
     1.8,
     "8–45"
    ],
    [
     "12–17",
     "5 × 5",
     3,
     2.3,
     "10–56"
    ],
    [
     "17–22",
     "6 × 6",
     3.5,
     2.8,
     "14–70"
    ],
    [
     "22–30",
     "8 × 7",
     4,
     3.3,
     "18–90"
    ],
    [
     "30–38",
     "10 × 8",
     5,
     3.3,
     "22–110"
    ],
    [
     "38–44",
     "12 × 8",
     5,
     3.3,
     "28–140"
    ],
    [
     "44–50",
     "14 × 9",
     5.5,
     3.8,
     "36–160"
    ],
    [
     "50–58",
     "16 × 10",
     6,
     4.3,
     "45–180"
    ],
    [
     "58–65",
     "18 × 11",
     7,
     4.4,
     "50–200"
    ]
   ]
  }
 },
 "sheet_text": "Parallel keys DIN 6885 form A: 2 × 2 to 18 × 11, with keyway depths — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/parallel-keys-din-6885/  (CC BY 4.0)\nBasis: DIN 6885-1 parallel keys and keyways: key b × h by shaft diameter, shaft keyway depth t1, hub keyway depth t2, standard lengths\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Form A: both ends round (radius b/2), for end-milled keyways. Keyway width = b; cut t1 into the shaft and t2 into the hub.\n\nshaft_mm  key_b_x_h  shaft_depth_t1  hub_depth_t2  lengths_mm\n6–8  2 × 2  1.2  1.0  6–20\n8–10  3 × 3  1.8  1.4  6–36\n10–12  4 × 4  2.5  1.8  8–45\n12–17  5 × 5  3.0  2.3  10–56\n17–22  6 × 6  3.5  2.8  14–70\n22–30  8 × 7  4.0  3.3  18–90\n30–38  10 × 8  5.0  3.3  22–110\n38–44  12 × 8  5.0  3.3  28–140\n44–50  14 × 9  5.5  3.8  36–160\n50–58  16 × 10  6.0  4.3  45–180\n58–65  18 × 11  7.0  4.4  50–200\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- DIN: DIN 6885-1 Drive type fastenings without taper action; parallel keys, keyways, deep pattern — standard — DIN; dimensions are facts [verify license at link] — https://www.din.de/en\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 150 parts): https://xemstudio.com/files/hardware/parallel-keys-din-6885/index.json\nAPI: https://xemstudio.com/api/geometry?object=parallel-keys-din-6885\n",
 "sources": [
  {
   "publisher": "DIN",
   "title": "DIN 6885-1 Drive type fastenings without taper action; parallel keys, keyways, deep pattern",
   "url": "https://www.din.de/en",
   "formats": [
    "standard"
   ],
   "license": "DIN; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
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  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
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  "tolerance_mm": null
 },
 "related": [
  "square-keys-inch",
  "metric-shafts",
  "shaft-collars"
 ],
 "fits": [],
 "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": [],
 "faq": [
  {
   "q": "Key for a 20 mm shaft?",
   "a": "6 × 6; keyway 3.5 deep in the shaft, 2.8 in the hub."
  }
 ],
 "files_license": null,
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   "note": "key 4 × 4 × 25, form A (round ends) for shafts over 10 up to 12 mm: shaft keyway depth 2.5, hub 1.8"
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  {
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   "note": "key 4 × 4 × 28, form A (round ends) for shafts over 10 up to 12 mm: shaft keyway depth 2.5, hub 1.8"
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   "note": "key 4 × 4 × 32, form A (round ends) for shafts over 10 up to 12 mm: shaft keyway depth 2.5, hub 1.8"
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  {
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   "note": "key 4 × 4 × 36, form A (round ends) for shafts over 10 up to 12 mm: shaft keyway depth 2.5, hub 1.8"
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   "note": "key 4 × 4 × 40, form A (round ends) for shafts over 10 up to 12 mm: shaft keyway depth 2.5, hub 1.8"
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   "note": "key 4 × 4 × 45, form A (round ends) for shafts over 10 up to 12 mm: shaft keyway depth 2.5, hub 1.8"
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   "note": "key 5 × 5 × 10, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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  {
   "file": "key-5x5x12",
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   "note": "key 5 × 5 × 12, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 14, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 16, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 18, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 20, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 22, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 25, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 28, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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  {
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   "note": "key 5 × 5 × 32, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 36, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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    "stl"
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   "note": "key 5 × 5 × 40, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "note": "key 5 × 5 × 45, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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  {
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    "stl"
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   "note": "key 5 × 5 × 50, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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  {
   "file": "key-5x5x56",
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    "stl"
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   "note": "key 5 × 5 × 56, form A (round ends) for shafts over 12 up to 17 mm: shaft keyway depth 3.0, hub 2.3"
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   "file": "key-6x6x14",
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 14, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x16",
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/parallel-keys-din-6885/key-6x6x16.stl",
   "note": "key 6 × 6 × 16, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
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  {
   "file": "key-6x6x18",
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/parallel-keys-din-6885/key-6x6x18.stl",
   "note": "key 6 × 6 × 18, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x20",
   "formats": [
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 20, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x22",
   "formats": [
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/parallel-keys-din-6885/key-6x6x22.stl",
   "note": "key 6 × 6 × 22, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x25",
   "formats": [
    "step",
    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 25, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x28",
   "formats": [
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 28, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x32",
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 32, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 36, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 40, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 45, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 50, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
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    "stl"
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   "note": "key 6 × 6 × 56, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x63",
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    "step",
    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 6 × 6 × 63, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-6x6x70",
   "formats": [
    "step",
    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/parallel-keys-din-6885/key-6x6x70.stl",
   "note": "key 6 × 6 × 70, form A (round ends) for shafts over 17 up to 22 mm: shaft keyway depth 3.5, hub 2.8"
  },
  {
   "file": "key-8x7x18",
   "formats": [
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/parallel-keys-din-6885/key-8x7x18.stl",
   "note": "key 8 × 7 × 18, form A (round ends) for shafts over 22 up to 30 mm: shaft keyway depth 4.0, hub 3.3"
  },
  {
   "file": "key-8x7x20",
   "formats": [
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   "note": "key 8 × 7 × 20, form A (round ends) for shafts over 22 up to 30 mm: shaft keyway depth 4.0, hub 3.3"
  },
  {
   "file": "key-8x7x22",
   "formats": [
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 8 × 7 × 22, form A (round ends) for shafts over 22 up to 30 mm: shaft keyway depth 4.0, hub 3.3"
  },
  {
   "file": "key-8x7x25",
   "formats": [
    "step",
    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 8 × 7 × 25, form A (round ends) for shafts over 22 up to 30 mm: shaft keyway depth 4.0, hub 3.3"
  },
  {
   "file": "key-8x7x28",
   "formats": [
    "step",
    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "note": "key 8 × 7 × 28, form A (round ends) for shafts over 22 up to 30 mm: shaft keyway depth 4.0, hub 3.3"
  },
  {
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   "note": "key 14 × 9 × 160, form A (round ends) for shafts over 44 up to 50 mm: shaft keyway depth 5.5, hub 3.8"
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   "note": "key 16 × 10 × 70, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 16 × 10 × 90, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 16 × 10 × 100, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 16 × 10 × 110, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 16 × 10 × 125, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 16 × 10 × 140, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 16 × 10 × 160, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 16 × 10 × 180, form A (round ends) for shafts over 50 up to 58 mm: shaft keyway depth 6.0, hub 4.3"
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   "note": "key 18 × 11 × 50, form A (round ends) for shafts over 58 up to 65 mm: shaft keyway depth 7.0, hub 4.4"
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   "note": "key 18 × 11 × 125, form A (round ends) for shafts over 58 up to 65 mm: shaft keyway depth 7.0, hub 4.4"
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   "note": "key 18 × 11 × 140, form A (round ends) for shafts over 58 up to 65 mm: shaft keyway depth 7.0, hub 4.4"
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   "note": "key 18 × 11 × 160, form A (round ends) for shafts over 58 up to 65 mm: shaft keyway depth 7.0, hub 4.4"
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   "note": "key 18 × 11 × 180, form A (round ends) for shafts over 58 up to 65 mm: shaft keyway depth 7.0, hub 4.4"
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 ],
 "markdown": "https://xemstudio.com/objects/parallel-keys-din-6885/index.md"
}