{
 "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": "emax-es9251-ii-servo",
 "name": "EMAX ES9251 II 4 g digital servo",
 "kind": "modern",
 "category": "RC planes",
 "group": "Micro servos",
 "year": null,
 "question": "What are the dimensions of the EMAX ES9251 II 4 g digital servo?",
 "tags": [
  "servo",
  "micro servo",
  "emax",
  "indoor plane",
  "rc car"
 ],
 "aliases": [
  "es9251 ii dimensions",
  "emax es9251 size",
  "es9251",
  "4g servo",
  "5g servo",
  "3.7g servo",
  "sub micro servo",
  "micro servo 4g medidas",
  "servo 4g",
  "Mikroservo 4g"
 ],
 "overall_mm": {
  "length": 18.02,
  "width": 7.91,
  "height": 16.8
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/emax-es9251-ii-servo/",
 "sheet_txt": "https://xemstudio.com/objects/emax-es9251-ii-servo/sheet.txt",
 "sheet": {
  "basis": "EMAX official shop (maker)",
  "overall_mm": {
   "length": 18.02,
   "width": 7.91,
   "height": 16.8
  },
  "notes": [
   "The EMAX ES9251 II is a 4 g plastic-gear micro digital servo, 18.02 × 7.91 × 16.8 mm, 4.5–6 V, 0.27 kgf·cm and 0.08 s/60° at 4.8 V, with a JR/FUT plug (EMAX).",
   "The file is an envelope box 18.02 × 7.91 × 16.8 mm at the published size, true size, no printing allowance. Mounting ears, output shaft and lead are not modelled."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "size",
     "18.02 × 7.91 × 16.8 mm (axes not labelled)"
    ],
    [
     "weight",
     "4 g"
    ],
    [
     "voltage",
     "4.5–6.0 V"
    ],
    [
     "stall torque",
     "0.27 kgf·cm @ 4.8 V"
    ],
    [
     "speed",
     "0.08 s/60° @ 4.8 V"
    ],
    [
     "plug",
     "JR / Futaba"
    ],
    [
     "ears, spline, lead",
     "not published in text"
    ]
   ]
  }
 },
 "sheet_text": "EMAX ES9251 II 4 g digital servo — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/emax-es9251-ii-servo/  (sheet CC BY 4.0)\nBasis: EMAX official shop (maker)\nCatalog version: 2026-10-20\n\nOverall (mm): length 18.02, width 7.91, height 16.8\n- The EMAX ES9251 II is a 4 g plastic-gear micro digital servo, 18.02 × 7.91 × 16.8 mm, 4.5–6 V, 0.27 kgf·cm and 0.08 s/60° at 4.8 V, with a JR/FUT plug (EMAX).\n- The file is an envelope box 18.02 × 7.91 × 16.8 mm at the published size, true size, no printing allowance. Mounting ears, output shaft and lead are not modelled.\n\ndimension  value\nsize  18.02 × 7.91 × 16.8 mm (axes not labelled)\nweight  4 g\nvoltage  4.5–6.0 V\nstall torque  0.27 kgf·cm @ 4.8 V\nspeed  0.08 s/60° @ 4.8 V\nplug  JR / Futaba\nears, spline, lead  not published in text\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- EMAX: ES9251 II 4 g plastic micro digital servo — web — Publisher's page; dimensions are facts — https://shop.emaxmodel.com/products/emax-es9251-ii-4g-plastic-micro-digital-servo-for-rc-model\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/emax-es9251-ii-servo/index.json\nAPI: https://xemstudio.com/api/geometry?object=emax-es9251-ii-servo\n",
 "sources": [
  {
   "publisher": "EMAX",
   "title": "ES9251 II 4 g plastic micro digital servo",
   "url": "https://shop.emaxmodel.com/products/emax-es9251-ii-4g-plastic-micro-digital-servo-for-rc-model",
   "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": [
  "feetech-fs90r-continuous-rotation-servo",
  "spektrum-a2005-linear-servo",
  "spektrum-a2030l-linear-servo",
  "emax-es9051-servo",
  "hitec-hs-35hd-servo",
  "towerpro-sg90-micro-servo",
  "rc-servos"
 ],
 "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 big is the EMAX ES9251 II?",
   "a": "18.02 × 7.91 × 16.8 mm, 4 g."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "emax-es9251-ii-servo-envelope",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/emax-es9251-ii-servo/emax-es9251-ii-servo-envelope.step",
   "stl": "https://xemstudio.com/files/hardware/emax-es9251-ii-servo/emax-es9251-ii-servo-envelope.stl",
   "note": "An envelope box 18.02 × 7.91 × 16.8 mm (Mounting ears, output shaft and lead are not modelled)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/emax-es9251-ii-servo/index.md"
}