{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "splined-mitre-joint",
 "name": "Splined mitre joint (hidden spline)",
 "kind": "hardware",
 "category": "Joinery",
 "group": "Mitre joints",
 "year": null,
 "question": "How big is the spline in a mitre joint?",
 "tags": [
  "joinery",
  "woodworking joint",
  "3d printable",
  "connect 3d prints",
  "no glue",
  "stl",
  "step",
  "mitre joints"
 ],
 "aliases": [
  "splined mitre",
  "spline mitre joint",
  "mitre spline",
  "miter spline",
  "inglete con lengüeta",
  "Gehrung mit Feder"
 ],
 "overall_mm": {
  "length": 80,
  "width": 80,
  "height": 20
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 4,
 "url": "https://xemstudio.com/objects/splined-mitre-joint/",
 "sheet_txt": "https://xemstudio.com/objects/splined-mitre-joint/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design — geometry computed in the generator from traditional proportions",
  "overall_mm": {
   "length": 80,
   "width": 80,
   "height": 20
  },
  "notes": [
   "Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).",
   "A thin spline across the mitre faces lines the corner up and stops it slipping."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "stock",
     "20 × 20 mm square"
    ],
    [
     "parts",
     "part a, part b, spline"
    ],
    [
     "mitre",
     "45°"
    ],
    [
     "spline",
     "3 mm thick, 18 mm along the mitre, 10 mm across it, hidden inside"
    ],
    [
     "assembles",
     "spline into one slot, close the mitre"
    ],
    [
     "holds",
     "keeps the mitre aligned and adds strength"
    ]
   ]
  }
 },
 "sheet_text": "Splined mitre joint (hidden spline) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/splined-mitre-joint/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)\nBasis: Xem Studio design — geometry computed in the generator from traditional proportions\nCatalog version: 2026-10-20\n\nOverall (mm): length 80.0, width 80.0, height 20.0\n- Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).\n- A thin spline across the mitre faces lines the corner up and stops it slipping.\n\ndimension  value\nstock  20 × 20 mm square\nparts  part a, part b, spline\nmitre  45°\nspline  3 mm thick, 18 mm along the mitre, 10 mm across it, hidden inside\nassembles  spline into one slot, close the mitre\nholds  keeps the mitre aligned and adds strength\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Xem Studio: Joinery design (geometry computed in the generator from traditional proportions) — web — Xem Studio design — https://xemstudio.com/\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/splined-mitre-joint/index.json\nAPI: https://xemstudio.com/api/geometry?object=splined-mitre-joint\n",
 "sources": [
  {
   "publisher": "Xem Studio",
   "title": "Joinery design (geometry computed in the generator from traditional proportions)",
   "url": "https://xemstudio.com/",
   "formats": [
    "web"
   ],
   "license": "Xem Studio design",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "keyed-mitre-joint",
  "butterfly-key-joint"
 ],
 "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": "How thick is a mitre spline?",
   "a": "About 1/6 of the stock: 3 mm in 20 mm here."
  }
 ],
 "files_license": {
  "name": "Xem Studio Design License",
  "holder": "Xem Studio",
  "url": "https://xemstudio.com/license/",
  "note": "Xem Studio's own design: free to use, print, modify and sell things made from it; not to be republished or redistributed as files."
 },
 "offers": [
  {
   "file": "splined-mitre-joint-part-a",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-part-a.step",
   "stl": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-part-a.stl",
   "note": "Mitred member A with a spline slot"
  },
  {
   "file": "splined-mitre-joint-part-b",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-part-b.step",
   "stl": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-part-b.stl",
   "note": "Mitred member B with a spline slot"
  },
  {
   "file": "splined-mitre-joint-spline",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-spline.step",
   "stl": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-spline.stl",
   "note": "Spline 18 × 10 × 3 mm"
  },
  {
   "file": "splined-mitre-joint-assembled",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-assembled.step",
   "stl": "https://xemstudio.com/files/hardware/splined-mitre-joint/splined-mitre-joint-assembled.stl",
   "note": "All parts in their assembled position (each part its own solid)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/splined-mitre-joint/index.md"
}