{
 "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": "ratchet-feed-pawl-24t-d40",
 "name": "Feed pawl for the 24-tooth Ø40 ratchet (pivot 30 mm from the wheel axis)",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What shape is a ratchet feed pawl?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "feed pawl",
  "ratchet pawl",
  "click",
  "trinquete (uña de avance)",
  "Schaltklinke"
 ],
 "overall_mm": {
  "length": 18.39,
  "width": 8,
  "height": 6
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/ratchet-feed-pawl-24t-d40/",
 "sheet_txt": "https://xemstudio.com/objects/ratchet-feed-pawl-24t-d40/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 18.39,
   "width": 8,
   "height": 6
  },
  "notes": [
   "6 mm pawl with a Ø8 boss on a Ø3 pivot and a narrow nose whose end face is cut to lie on the steep face of a 3 mm ratchet tooth over 80 % of its depth (2.4 mm): it drives the wheel through face contact, not a point. Pivot to nose 14.39 mm; designed for a pivot 30 mm from the wheel's axis.",
   "The same face-contact pawl design as the ratchet-wheel pawls (pawl-24t-d40), drawn here for a feed lever's pivot.",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "pivot hole",
     "Ø3, Ø8 boss"
    ],
    [
     "pivot to nose",
     "14.39 mm"
    ],
    [
     "nose face",
     "2.4 mm, on the tooth's steep face"
    ],
    [
     "thickness",
     "6 mm"
    ]
   ]
  }
 },
 "sheet_text": "Feed pawl for the 24-tooth Ø40 ratchet (pivot 30 mm from the wheel axis) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/ratchet-feed-pawl-24t-d40/  (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 18.39, width 8.0, height 6.0\n- 6 mm pawl with a Ø8 boss on a Ø3 pivot and a narrow nose whose end face is cut to lie on the steep face of a 3 mm ratchet tooth over 80 % of its depth (2.4 mm): it drives the wheel through face contact, not a point. Pivot to nose 14.39 mm; designed for a pivot 30 mm from the wheel's axis.\n- The same face-contact pawl design as the ratchet-wheel pawls (pawl-24t-d40), drawn here for a feed lever's pivot.\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\npivot hole  Ø3, Ø8 boss\npivot to nose  14.39 mm\nnose face  2.4 mm, on the tooth's steep face\nthickness  6 mm\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. 225: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_225.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/ratchet-feed-lever-mechanism/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/ratchet-feed-pawl-24t-d40/index.json\nAPI: https://xemstudio.com/api/geometry?object=ratchet-feed-pawl-24t-d40\n",
 "sources": [
  {
   "publisher": "Henry T. Brown (1868, public domain)",
   "title": "Five Hundred and Seven Mechanical Movements — scan on archive.org",
   "url": "https://archive.org/details/fivehundredseven00browiala",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "507movements.com",
   "title": "Brown's movement No. 225: figure, his text and an animation",
   "url": "https://507movements.com/mm_225.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Xem Studio",
   "title": "drawing",
   "url": "https://xemstudio.com/objects/ratchet-feed-lever-mechanism/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "ratchet-feed-lever-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 shape is a ratchet feed pawl?",
   "a": "6 mm pawl with a Ø8 boss on a Ø3 pivot and a narrow nose whose end face is cut to lie on the steep face of a 3 mm ratchet tooth over 80 % of its depth (2.4 mm): it drives the wheel through face contact, not a point. Pivot to nose 14.39 mm; designed for a pivot 30 mm from the wheel's axis."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "ratchet-feed-pawl-24t-d40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/ratchet-feed-pawl-24t-d40/ratchet-feed-pawl-24t-d40.step",
   "stl": "https://xemstudio.com/files/hardware/ratchet-feed-pawl-24t-d40/ratchet-feed-pawl-24t-d40.stl",
   "note": "pawl, pivot at origin, nose on +X, z 0..6"
  }
 ],
 "markdown": "https://xemstudio.com/objects/ratchet-feed-pawl-24t-d40/index.md"
}