{
 "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": "t-slot-feet",
 "name": "Extrusion end feet for 20, 30, 40 and 10-series",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Framing",
 "year": null,
 "question": "How do I put a foot on the end of 2020 extrusion?",
 "tags": [
  "foot",
  "extrusion",
  "2020",
  "t-slot",
  "leveling",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "2020 extrusion foot",
  "t slot foot stl",
  "extrusion end foot 3d print",
  "4040 foot",
  "2020 profile foot"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 4,
 "url": "https://xemstudio.com/objects/t-slot-feet/",
 "sheet_txt": "https://xemstudio.com/objects/t-slot-feet/sheet.txt",
 "sheet": {
  "basis": "Square foot 1.6 × the profile, socket = profile outline (exact) 3 deep, clearance hole for a screw into the centre bore",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Each foot is a 6 mm thick square 1.6 × the profile size with R4 corners, a socket the exact profile outline 3 mm deep, a clearance hole for the screw into the profile's centre bore, and a recess the profile's width in diameter, 1.5 mm deep, underneath.",
   "20-series: 32 × 32, Ø5.5 for M5. 30-series: 48 × 48, Ø9 for M8. 40-series: 64 × 64, Ø9 for M8. 10-series: 40.64 × 40.64, Ø7.14 for 1/4-20.",
   "The screw threads into the profile's centre bore (M5 on 20-series, M8 on 30 and 40)."
  ],
  "table": {
   "columns": [
    "series",
    "foot_mm",
    "socket_mm",
    "hole_mm",
    "screw"
   ],
   "rows": [
    [
     "20",
     32,
     "20 × 20 × 3",
     5.5,
     "M5"
    ],
    [
     "30",
     48,
     "30 × 30 × 3",
     9,
     "M8"
    ],
    [
     "40",
     64,
     "40 × 40 × 3",
     9,
     "M8"
    ],
    [
     "10 (1 in)",
     40.64,
     "25.4 × 25.4 × 3",
     7.14,
     "1/4-20"
    ]
   ]
  }
 },
 "sheet_text": "Extrusion end feet for 20, 30, 40 and 10-series — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/t-slot-feet/  (CC BY 4.0)\nBasis: Square foot 1.6 × the profile, socket = profile outline (exact) 3 deep, clearance hole for a screw into the centre bore\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Each foot is a 6 mm thick square 1.6 × the profile size with R4 corners, a socket the exact profile outline 3 mm deep, a clearance hole for the screw into the profile's centre bore, and a recess the profile's width in diameter, 1.5 mm deep, underneath.\n- 20-series: 32 × 32, Ø5.5 for M5. 30-series: 48 × 48, Ø9 for M8. 40-series: 64 × 64, Ø9 for M8. 10-series: 40.64 × 40.64, Ø7.14 for 1/4-20.\n- The screw threads into the profile's centre bore (M5 on 20-series, M8 on 30 and 40).\n\nseries  foot_mm  socket_mm  hole_mm  screw\n20  32  20 × 20 × 3  5.5  M5\n30  48  30 × 30 × 3  9  M8\n40  64  40 × 40 × 3  9  M8\n10 (1 in)  40.64  25.4 × 25.4 × 3  7.14  1/4-20\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: T-slot nut — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/T-slot_nut\n- OpenBuilds: Tee nuts and brackets for V-slot — web, STEP — OpenBuilds site [verify license at link] — https://openbuildspartstore.com/\n- Long Earth Society: Engine and rig builds on extrusion frames — web, video — LES site — https://longearthsociety.com/engineering/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/t-slot-feet/index.json\nAPI: https://xemstudio.com/api/geometry?object=t-slot-feet\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "T-slot nut",
   "url": "https://en.wikipedia.org/wiki/T-slot_nut",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "OpenBuilds",
   "title": "Tee nuts and brackets for V-slot",
   "url": "https://openbuildspartstore.com/",
   "formats": [
    "web",
    "STEP"
   ],
   "license": "OpenBuilds site",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine and rig builds on extrusion frames",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "web",
    "video"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "t-slot-end-caps",
  "slide-in-t-nuts",
  "t-slot-extrusions",
  "2020-extrusion",
  "button-head-screws-metric"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "t-slot-extrusions",
     "why": "profile end in the socket (socket fit)"
    }
   ]
  },
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "button-head-screws-metric",
     "why": "screw through the hole into the centre bore"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "t-slot-end-caps",
     "why": "a plain cap where no foot is needed"
    }
   ]
  }
 ],
 "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": [
  {
   "feature": "bracket / gusset / plate screw holes",
   "exact": "Ø5.5 / 6.6 / 9.0 / 7.14",
   "mates": "M5 / M6 / M8 / 1/4-20 clearance",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "foot socket",
   "exact": "profile outline (20 / 30 / 40 / 25.4)",
   "mates": "profile end",
   "fit": "socket",
   "files": "foot-"
  },
  {
   "feature": "foot screw hole",
   "exact": "Ø5.5 / 9.0 / 9.0 / 7.14",
   "mates": "M5 / M8 / M8 / 1/4-20 into the centre bore",
   "fit": "designed",
   "files": "foot-"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. Typical FDM: hole +0.0 to +0.1 mm on diameter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. Typical FDM: +0.2 mm.",
  "run": "turns or slides in use: pin in a link, rod through a guide. Typical FDM: +0.3 mm.",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. Typical FDM: +0.3 mm.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What screw holds a foot on 2020 extrusion?",
   "a": "An M5 through the Ø5.5 hole into the tapped 4.2 mm centre bore."
  },
  {
   "q": "How deep is the socket?",
   "a": "3 mm, at the exact profile outline."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "foot-20",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-20.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-20.stl",
   "note": "20-series end foot: 20 × 20 socket for the profile end (exact), Ø5.5 clearance for an M5 into the centre bore"
  },
  {
   "file": "foot-30",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-30.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-30.stl",
   "note": "30-series end foot: 30 × 30 socket for the profile end (exact), Ø9 clearance for an M8 into the centre bore"
  },
  {
   "file": "foot-40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-40.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-40.stl",
   "note": "40-series end foot: 40 × 40 socket for the profile end (exact), Ø9 clearance for an M8 into the centre bore"
  },
  {
   "file": "foot-10in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-10in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-brackets-and-nuts/foot-10in.stl",
   "note": "10in-series end foot: 25.4 × 25.4 socket for the profile end (exact), Ø7.14 clearance for an 1/4-20 into the centre bore"
  }
 ],
 "markdown": "https://xemstudio.com/objects/t-slot-feet/index.md"
}