{
 "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": "crank-gear-m1-30t-pin-r10",
 "name": "Crank gear, module 1, 30 T with a Ø3 crank-pin hole at 10 mm",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What is a crank gear?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "crank gear",
  "gear with crank pin",
  "engranaje con manivela",
  "Kurbelzahnrad"
 ],
 "overall_mm": {
  "length": 31.99,
  "width": 31.89,
  "height": 8
 },
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 "free_files": 1,
 "url": "https://xemstudio.com/objects/crank-gear-m1-30t-pin-r10/",
 "sheet_txt": "https://xemstudio.com/objects/crank-gear-m1-30t-pin-r10/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 31.99,
   "width": 31.89,
   "height": 8
  },
  "notes": [
   "The catalog module 1, 30-tooth gear (Ø10 bore, 8 face) with a Ø3 crank-pin hole on a 10 mm radius, a quarter tooth pitch (3°) off a tooth centre so that two of them meshed at 30 mm turn as mirror images (Cartwright's parallel motion).",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "module",
     "1"
    ],
    [
     "teeth",
     "30"
    ],
    [
     "crank radius",
     "10 mm"
    ],
    [
     "pin hole",
     "Ø3 at 3° from a tooth centre"
    ],
    [
     "bore",
     "Ø10"
    ]
   ]
  }
 },
 "sheet_text": "Crank gear, module 1, 30 T with a Ø3 crank-pin hole at 10 mm — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/crank-gear-m1-30t-pin-r10/  (CC BY 4.0)\nBasis: Xem Studio design following Brown's figure (1868); true size, no printing allowance\nCatalog version: 2026-10-20\n\nOverall (mm): length 31.99, width 31.89, height 8.0\n- The catalog module 1, 30-tooth gear (Ø10 bore, 8 face) with a Ø3 crank-pin hole on a 10 mm radius, a quarter tooth pitch (3°) off a tooth centre so that two of them meshed at 30 mm turn as mirror images (Cartwright's parallel motion).\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\nmodule  1\nteeth  30\ncrank radius  10 mm\npin hole  Ø3 at 3° from a tooth centre\nbore  Ø10\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Henry T. Brown (1868, public domain): Five Hundred and Seven Mechanical Movements — scan on archive.org — web — Publisher's page; dimensions are facts — https://archive.org/details/fivehundredseven00browiala\n- 507movements.com: Brown's movement No. 328: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_328.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/cartwright-parallel-motion-mechanism/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/crank-gear-m1-30t-pin-r10/index.json\nAPI: https://xemstudio.com/api/geometry?object=crank-gear-m1-30t-pin-r10\n",
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   "title": "Five Hundred and Seven Mechanical Movements — scan on archive.org",
   "url": "https://archive.org/details/fivehundredseven00browiala",
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   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
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  {
   "publisher": "507movements.com",
   "title": "Brown's movement No. 328: figure, his text and an animation",
   "url": "https://507movements.com/mm_328.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
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   "publisher": "Xem Studio",
   "title": "drawing",
   "url": "https://xemstudio.com/objects/cartwright-parallel-motion-mechanism/",
   "formats": [
    "web"
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   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
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 "related": [
  "cartwright-parallel-motion-mechanism"
 ],
 "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": "What is a crank gear?",
   "a": "The catalog module 1, 30-tooth gear (Ø10 bore, 8 face) with a Ø3 crank-pin hole on a 10 mm radius, a quarter tooth pitch (3°) off a tooth centre so that two of them meshed at 30 mm turn as mirror images (Cartwright's parallel motion)."
  }
 ],
 "files_license": null,
 "offers": [
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   "formats": [
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/crank-gear-m1-30t-pin-r10/crank-gear-m1-30t-r10.step",
   "stl": "https://xemstudio.com/files/hardware/crank-gear-m1-30t-pin-r10/crank-gear-m1-30t-r10.stl",
   "note": "crank gear, z 0..8"
  }
 ],
 "markdown": "https://xemstudio.com/objects/crank-gear-m1-30t-pin-r10/index.md"
}