{
 "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": "betafpv-gemfan-40mm-3-blade-1-5mm",
 "name": "Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV)",
 "kind": "modern",
 "category": "Drones",
 "group": "Propellers",
 "year": null,
 "question": "What are the dimensions of the Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV)?",
 "tags": [
  "drone",
  "quadcopter",
  "fpv",
  "uav",
  "propellers"
 ],
 "aliases": [
  "Gemfan 40mm BetaFPV dimensions",
  "Gemfan 40mm BetaFPV hub thickness",
  "Gemfan 40mm BetaFPV bore",
  "Gemfan 40mm BetaFPV weight",
  "Gemfan 40mm BetaFPV shaft size",
  "Gemfan 40mm BetaFPV specs",
  "dimensiones hélice Gemfan 40mm BetaFPV",
  "Gemfan 40mm BetaFPV Propeller Abmessungen",
  "Cetus Pro props",
  "BetaFPV 40mm prop"
 ],
 "overall_mm": {
  "length": 40,
  "width": 40,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/betafpv-gemfan-40mm-3-blade-1-5mm/",
 "sheet_txt": "https://xemstudio.com/objects/betafpv-gemfan-40mm-3-blade-1-5mm/sheet.txt",
 "sheet": {
  "basis": "Manufacturer specifications (BETAFPV)",
  "overall_mm": {
   "length": 40,
   "width": 40,
   "height": null
  },
  "notes": [
   "BetaFPV's Cetus Pro / 75 mm whoop prop; BetaFPV notes the hub was changed from three holes to one.",
   "True size, no printing tolerance added. Only published numbers are used; anything not published is said so."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "Diameter",
     "40 mm"
    ],
    [
     "Pitch",
     "not published"
    ],
    [
     "Hub thickness",
     "not published"
    ],
    [
     "Bore / mount",
     "1.5 mm inner diameter, single hole"
    ],
    [
     "Weight",
     "1.94 g per set of 4 (2CW+2CCW)"
    ]
   ]
  }
 },
 "sheet_text": "Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/betafpv-gemfan-40mm-3-blade-1-5mm/  (sheet CC BY 4.0)\nBasis: Manufacturer specifications (BETAFPV)\nCatalog version: 2026-10-20\n\nOverall (mm): length 40, width 40\n- BetaFPV's Cetus Pro / 75 mm whoop prop; BetaFPV notes the hub was changed from three holes to one.\n- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.\n\ndimension  value\nDiameter  40 mm\nPitch  not published\nHub thickness  not published\nBore / mount  1.5 mm inner diameter, single hole\nWeight  1.94 g per set of 4 (2CW+2CCW)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- BETAFPV: Gemfan 40mm 3-Blade Propellers (1.5mm Shaft) — web — Publisher's page; dimensions are facts — https://betafpv.com/collections/1-2-inch-propellers/products/gemfan-40mm-3-blade-propellers-1-5mm-shaft-2\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/betafpv-gemfan-40mm-3-blade-1-5mm/index.json\nAPI: https://xemstudio.com/api/geometry?object=betafpv-gemfan-40mm-3-blade-1-5mm\n",
 "sources": [
  {
   "publisher": "BETAFPV",
   "title": "Gemfan 40mm 3-Blade Propellers (1.5mm Shaft)",
   "url": "https://betafpv.com/collections/1-2-inch-propellers/products/gemfan-40mm-3-blade-propellers-1-5mm-shaft-2",
   "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": [
  "fpv-drone-motors",
  "apc-8x4e-propeller",
  "apc-8x6e-propeller",
  "apc-9x4-5e-propeller",
  "apc-9x6e-propeller"
 ],
 "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": "What shaft does the Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV) fit?",
   "a": "Bore/mount: 1.5 mm inner diameter, single hole."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "betafpv-gemfan-40mm-3-blade-1-5mm-swept-disc",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/betafpv-gemfan-40mm-3-blade-1-5mm/betafpv-gemfan-40mm-3-blade-1-5mm-swept-disc.step",
   "stl": "https://xemstudio.com/files/hardware/betafpv-gemfan-40mm-3-blade-1-5mm/betafpv-gemfan-40mm-3-blade-1-5mm-swept-disc.stl",
   "note": "Swept disc Ø40 mm, 1 mm reference (hub thickness not published), Ø1.5 mm bore — blades not modelled"
  }
 ],
 "markdown": "https://xemstudio.com/objects/betafpv-gemfan-40mm-3-blade-1-5mm/index.md"
}