{
 "digest": null,
 "links": {
  "fits": [],
  "members": [],
  "cases": [],
  "assemblies": []
 },
 "prints": [],
 "part": {
  "id": "ada-4411-nema8-stepper",
  "name": "NEMA 8 Mini Stepper 20x33 (Adafruit 4411)",
  "kind": "",
  "method": "",
  "vendor": "adafruit",
  "sku": "4411",
  "model": "",
  "buy": [
   "https://www.adafruit.com/product/4411"
  ],
  "url": "https://www.adafruit.com/product/4411",
  "category": "motor",
  "owned_qty": 0
 },
 "facts": {
  "id": "ada-4411-nema8-stepper",
  "name": "NEMA 8 Mini Stepper 20x33 (Adafruit 4411)",
  "vendor": "adafruit",
  "sku": "4411",
  "url": "https://www.adafruit.com/product/4411",
  "qty_owned": 1,
  "category": "motor",
  "frame": "origin plan bottom-left of 20.3 square, Z=0 rear face, shaft +Z; mounting face at Z=33",
  "body": {
   "size_mm": [
    20.3,
    20.3,
    42.0
   ],
   "outline": "rect"
  },
  "mounting": {
   "holes": [
    {
     "xy": [
      2.15,
      2.15
     ],
     "dia": 2.0,
     "thread": "M2",
     "depth": 2.5
    },
    {
     "xy": [
      18.15,
      2.15
     ],
     "dia": 2.0,
     "thread": "M2",
     "depth": 2.5
    },
    {
     "xy": [
      2.15,
      18.15
     ],
     "dia": 2.0,
     "thread": "M2",
     "depth": 2.5
    },
    {
     "xy": [
      18.15,
      18.15
     ],
     "dia": 2.0,
     "thread": "M2",
     "depth": 2.5
    }
   ],
   "pattern": "16.0 x 16.0 (NEMA 8 standard)",
   "shaft": {
    "dia": 4.0,
    "len": 9.0,
    "flat": "NONE - no D-cut, clamp couplings only"
   },
   "notes": "pilot boss 15 dia x 1.5; M2 screws strip easily - torque gently"
  },
  "electrical": {
   "vin": "3.9V rated, 600mA/phase",
   "notes": "1.8deg bipolar 4-wire, ~7 ohm windings, 0.2 kg.cm - light loads only; ~40cm leads"
  },
  "cad": {
   "file": "ada-4411-nema8-stepper.step",
   "fidelity": "envelope",
   "source": "ada-4411-nema8-stepper.py",
   "verified": true
  },
  "sources": [
   {
    "facts": "frame 20.3, holes 16x16 M2, pilot 15",
    "ref": "NEMA 8 standard (step.parts catalog attributes agree)",
    "date": "2026-07-23"
   },
   {
    "facts": "body 33, shaft 4x9 no flat, electrical",
    "ref": "https://www.adafruit.com/product/4411",
    "date": "2026-07-23"
   }
  ],
  "confidence": "body length from listing (title says 30, body text says 33 - modeled 33); caliper-verify + hole depth before fit-critical use"
 },
 "models": [
  {
   "handle": "sarg",
   "fidelity": "envelope",
   "verified": true,
   "visibility": "public",
   "url": "/m/sarg/ada-4411-nema8-stepper",
   "files": [
    "ada-4411-nema8-stepper.py",
    "ada-4411-nema8-stepper.step",
    "part.yaml"
   ]
  }
 ],
 "related": {
  "notes": {
   "exact": [],
   "chip": [],
   "addr": []
  },
  "parts": {
   "variants": [],
   "interface": [],
   "mounting": [],
   "cooccur": [],
   "owners": [],
   "addr": []
  }
 }
}