{
 "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": "nema-17-stepper",
 "name": "NEMA 17 stepper motor",
 "kind": "standard",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What are the NEMA 17 mounting dimensions?",
 "tags": [
  "motor",
  "mount",
  "bracket",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "nema17",
  "nema 17",
  "17hs"
 ],
 "overall_mm": {
  "length": null,
  "width": 42.3,
  "height": 42.3
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 3,
 "url": "https://xemstudio.com/objects/nema-17-stepper/",
 "sheet_txt": "https://xemstudio.com/objects/nema-17-stepper/sheet.txt",
 "sheet": {
  "basis": "NEMA ICS 16 frame standard; common vendor values",
  "overall_mm": {
   "length": null,
   "width": 42.3,
   "height": 42.3
  },
  "notes": [
   "Face 42.3 × 42.3 mm; four M3 holes on a 31.0 × 31.0 mm pattern; Ø22 mm pilot boss, 2 mm tall; Ø5 mm shaft with a D-flat, typically 20–24 mm long.",
   "Body length varies by torque (20–60 mm); the face and hole pattern don't."
  ],
  "mounting_holes": {
   "count": 4,
   "diameter_mm": 3,
   "pattern_mm": "31 x 31",
   "screw": "M3"
  }
 },
 "sheet_text": "NEMA 17 stepper motor — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/nema-17-stepper/  (CC BY 4.0)\nBasis: NEMA ICS 16 frame standard; common vendor values\nCatalog version: 2026-10-20\n\nOverall (mm): width 42.3, height 42.3\nMounting holes: 4 × Ø3.0 mm, pattern 31 x 31, screw M3\n- Face 42.3 × 42.3 mm; four M3 holes on a 31.0 × 31.0 mm pattern; Ø22 mm pilot boss, 2 mm tall; Ø5 mm shaft with a D-flat, typically 20–24 mm long.\n- Body length varies by torque (20–60 mm); the face and hole pattern don't.\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Stepper motor (NEMA frame sizes) — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Stepper_motor\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/nema-17-stepper/index.json\nAPI: https://xemstudio.com/api/geometry?object=nema-17-stepper\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Stepper motor (NEMA frame sizes)",
   "url": "https://en.wikipedia.org/wiki/Stepper_motor",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "socket-head-cap-screws-metric",
  "608-bearing",
  "2020-extrusion",
  "lm8uu-linear-bearing"
 ],
 "faq": [
  {
   "q": "What is the NEMA 17 mounting hole pattern?",
   "a": "Four M3 holes on a 31.0 × 31.0 mm square, 42.3 mm face, Ø22 mm pilot boss 2 mm tall."
  },
  {
   "q": "What is the NEMA 17 shaft diameter?",
   "a": "5 mm with a D-flat, usually 20–24 mm long. Body length 20–60 mm depending on torque; the face never changes."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "nema17-34",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/nema-17-stepper/nema17-34.step",
   "stl": "https://xemstudio.com/files/hardware/nema-17-stepper/nema17-34.stl",
   "note": "NEMA 17 envelope, 34 mm body, 31 mm M3 pattern, Ø5 D-shaft"
  },
  {
   "file": "nema17-40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/nema-17-stepper/nema17-40.step",
   "stl": "https://xemstudio.com/files/hardware/nema-17-stepper/nema17-40.stl",
   "note": "NEMA 17 envelope, 40 mm body, 31 mm M3 pattern, Ø5 D-shaft"
  },
  {
   "file": "nema17-48",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/nema-17-stepper/nema17-48.step",
   "stl": "https://xemstudio.com/files/hardware/nema-17-stepper/nema17-48.stl",
   "note": "NEMA 17 envelope, 48 mm body, 31 mm M3 pattern, Ø5 D-shaft"
  }
 ],
 "markdown": "https://xemstudio.com/objects/nema-17-stepper/index.md"
}