{
 "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": "square-keys-inch",
 "name": "Square keys, inch (ANSI B17.1): 3/32 to 1/2 in",
 "kind": "standard",
 "category": "Hardware",
 "group": "Mechanisms & linkages",
 "year": null,
 "question": "What key goes on a 1 inch shaft?",
 "tags": [
  "key",
  "keyway",
  "inch"
 ],
 "aliases": [
  "1 inch shaft key size",
  "ansi key size chart",
  "square key stock"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 35,
 "url": "https://xemstudio.com/objects/square-keys-inch/",
 "sheet_txt": "https://xemstudio.com/objects/square-keys-inch/sheet.txt",
 "sheet": {
  "basis": "ANSI B17.1 keys and keyseats: square key size by shaft diameter; keyseat depth k/2",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Square ends (bar stock keys)."
  ],
  "table": {
   "columns": [
    "shaft_in",
    "key_in",
    "lengths_in"
   ],
   "rows": [
    [
     "0.3125–0.4375",
     0.0938,
     "0.75, 1, 1.5, 2, 3"
    ],
    [
     "0.4375–0.5625",
     0.125,
     "0.75, 1, 1.5, 2, 3"
    ],
    [
     "0.5625–0.875",
     0.1875,
     "0.75, 1, 1.5, 2, 3"
    ],
    [
     "0.875–1.25",
     0.25,
     "0.75, 1, 1.5, 2, 3"
    ],
    [
     "1.25–1.375",
     0.3125,
     "0.75, 1, 1.5, 2, 3"
    ],
    [
     "1.375–1.75",
     0.375,
     "0.75, 1, 1.5, 2, 3"
    ],
    [
     "1.75–2.25",
     0.5,
     "0.75, 1, 1.5, 2, 3"
    ]
   ]
  }
 },
 "sheet_text": "Square keys, inch (ANSI B17.1): 3/32 to 1/2 in — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/square-keys-inch/  (CC BY 4.0)\nBasis: ANSI B17.1 keys and keyseats: square key size by shaft diameter; keyseat depth k/2\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Square ends (bar stock keys).\n\nshaft_in  key_in  lengths_in\n0.3125–0.4375  0.0938  0.75, 1, 1.5, 2, 3\n0.4375–0.5625  0.125  0.75, 1, 1.5, 2, 3\n0.5625–0.875  0.1875  0.75, 1, 1.5, 2, 3\n0.875–1.25  0.25  0.75, 1, 1.5, 2, 3\n1.25–1.375  0.3125  0.75, 1, 1.5, 2, 3\n1.375–1.75  0.375  0.75, 1, 1.5, 2, 3\n1.75–2.25  0.5  0.75, 1, 1.5, 2, 3\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ASME: ANSI B17.1 Keys and keyseats — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/b17-1-keys-keyseats\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 35 parts): https://xemstudio.com/files/hardware/square-keys-inch/index.json\nAPI: https://xemstudio.com/api/geometry?object=square-keys-inch\n",
 "sources": [
  {
   "publisher": "ASME",
   "title": "ANSI B17.1 Keys and keyseats",
   "url": "https://www.asme.org/codes-standards/find-codes-standards/b17-1-keys-keyseats",
   "formats": [
    "standard"
   ],
   "license": "ASME; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "parallel-keys-din-6885"
 ],
 "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 1 in shaft?",
   "a": "1/4 in square."
  }
 ],
 "files_license": null,
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   "stl": "https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x0.75in.stl",
   "note": "0.5 in square key × 0.75 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)"
  },
  {
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   "note": "0.5 in square key × 1 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)"
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  {
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   "stl": "https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x1.5in.stl",
   "note": "0.5 in square key × 1.5 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)"
  },
  {
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   "stl": "https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x2in.stl",
   "note": "0.5 in square key × 2 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)"
  },
  {
   "file": "square-key-32-64in-x3in",
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   "note": "0.5 in square key × 3 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/square-keys-inch/index.md"
}