{
 "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-ruler-triangle-120x40",
 "name": "Right-triangle ruler 120 × 40 × 4 (half of a sliding parallel ruler)",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What is a sliding-triangle parallel ruler?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "sliding parallel ruler",
  "triangle ruler",
  "regla de triángulos deslizantes",
  "Schiebedreieck-Parallellineal"
 ],
 "overall_mm": {
  "length": 120,
  "width": 40,
  "height": 4
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/parallel-ruler-triangle-120x40/",
 "sheet_txt": "https://xemstudio.com/objects/parallel-ruler-triangle-120x40/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 120,
   "width": 40,
   "height": 4
  },
  "notes": [
   "Right triangle with 120 and 40 mm legs, 4 mm thick: two of them, laid hypotenuse to hypotenuse, form a 120 × 40 rectangle whose long edges stay parallel as one triangle slides along the other.",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "legs",
     "120 × 40 mm"
    ],
    [
     "hypotenuse",
     "126.49 mm"
    ],
    [
     "thickness",
     "4 mm"
    ]
   ]
  }
 },
 "sheet_text": "Right-triangle ruler 120 × 40 × 4 (half of a sliding parallel ruler) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/parallel-ruler-triangle-120x40/  (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 120.0, width 40.0, height 4.0\n- Right triangle with 120 and 40 mm legs, 4 mm thick: two of them, laid hypotenuse to hypotenuse, form a 120 × 40 rectangle whose long edges stay parallel as one triangle slides along the other.\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\nlegs  120 × 40 mm\nhypotenuse  126.49 mm\nthickness  4 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. 322: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_322.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/sliding-triangle-parallel-ruler-mechanism/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/parallel-ruler-triangle-120x40/index.json\nAPI: https://xemstudio.com/api/geometry?object=parallel-ruler-triangle-120x40\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. 322: figure, his text and an animation",
   "url": "https://507movements.com/mm_322.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/sliding-triangle-parallel-ruler-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": [
  "sliding-triangle-parallel-ruler-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 sliding-triangle parallel ruler?",
   "a": "Right triangle with 120 and 40 mm legs, 4 mm thick: two of them, laid hypotenuse to hypotenuse, form a 120 × 40 rectangle whose long edges stay parallel as one triangle slides along the other."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "parallel-ruler-triangle-120x40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/parallel-ruler-triangle-120x40/parallel-ruler-triangle-120x40.step",
   "stl": "https://xemstudio.com/files/hardware/parallel-ruler-triangle-120x40/parallel-ruler-triangle-120x40.stl",
   "note": "triangle, right angle at the origin"
  }
 ],
 "markdown": "https://xemstudio.com/objects/parallel-ruler-triangle-120x40/index.md"
}