{
 "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": "dc-motor-370-size",
 "name": "370 size brushed DC motor: Ø24.4 × 30.8 mm, 2 × M3 on 17",
 "kind": "hardware",
 "category": "Electronics",
 "group": "Motors",
 "year": null,
 "question": "What are the dimensions of a 370 size DC motor?",
 "tags": [
  "370",
  "dc motor",
  "brushed motor",
  "rf-370",
  "motor",
  "motor envelope",
  "stirling"
 ],
 "aliases": [
  "370 motor dimensions",
  "370 motor mounting holes",
  "rf-370 dimensions",
  "370 dc motor size",
  "370 motor step",
  "370 motor stl"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/dc-motor-370-size/",
 "sheet_txt": "https://xemstudio.com/objects/dc-motor-370-size/sheet.txt",
 "sheet": {
  "basis": "Mabuchi RF-370CA dimension drawing; boss and hole spacing also on the RCDrone 370 listing. Envelope only: the outside of the motor at its published sizes. The windings, magnets, brushes and bearings inside are not drawn.",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Envelope only: the outside of the motor at its published sizes. The windings, magnets, brushes and bearings inside are not drawn.",
   "The can is Ø24.4 × 30.8 with a Ø6.45 × 1.7 boss on each end.",
   "The Ø2.0 shaft is 42.0 mm long and stands 10.5 mm beyond the front boss: 43.0 mm from the end-cap face to the shaft tip.",
   "Two M3 × 0.5 tapped holes on 17.0 mm centres in the face. The drawing gives no thread depth, so the holes are drawn Ø3.0 × 2.0 deep only to mark where they are.",
   "The terminal tabs are 18.3 mm apart on the end cap; they and the wire exit are not drawn.",
   "The JGA25-370 gearmotor uses this can (see its page).",
   "In DIY Stirling builds, brushed DC motors of this kind are turned by the engine and used as a generator (an LED, a resistor or a meter across the leads) or as a load on the flywheel shaft."
  ],
  "table": {
   "columns": [
    "feature",
    "mm",
    "from"
   ],
   "rows": [
    [
     "can",
     "Ø24.4 × 30.8",
     "Mabuchi RF-370CA"
    ],
    [
     "front and rear boss",
     "Ø6.45 × 1.7",
     "Mabuchi RF-370CA"
    ],
    [
     "shaft",
     "Ø2.0 × 42.0 long",
     "Mabuchi RF-370CA"
    ],
    [
     "shaft beyond the front boss",
     "10.5",
     "Mabuchi RF-370CA"
    ],
    [
     "end cap to shaft tip",
     "43.0",
     "Mabuchi RF-370CA"
    ],
    [
     "face holes",
     "2 × M3 × 0.5 on 17.0",
     "Mabuchi RF-370CA, RCDrone"
    ],
    [
     "terminal spacing",
     "18.3",
     "Mabuchi RF-370CA, RCDrone"
    ]
   ]
  }
 },
 "sheet_text": "370 size brushed DC motor: Ø24.4 × 30.8 mm, 2 × M3 on 17 — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/dc-motor-370-size/  (CC BY 4.0)\nBasis: Mabuchi RF-370CA dimension drawing; boss and hole spacing also on the RCDrone 370 listing. Envelope only: the outside of the motor at its published sizes. The windings, magnets, brushes and bearings inside are not drawn.\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Envelope only: the outside of the motor at its published sizes. The windings, magnets, brushes and bearings inside are not drawn.\n- The can is Ø24.4 × 30.8 with a Ø6.45 × 1.7 boss on each end.\n- The Ø2.0 shaft is 42.0 mm long and stands 10.5 mm beyond the front boss: 43.0 mm from the end-cap face to the shaft tip.\n- Two M3 × 0.5 tapped holes on 17.0 mm centres in the face. The drawing gives no thread depth, so the holes are drawn Ø3.0 × 2.0 deep only to mark where they are.\n- The terminal tabs are 18.3 mm apart on the end cap; they and the wire exit are not drawn.\n- The JGA25-370 gearmotor uses this can (see its page).\n- In DIY Stirling builds, brushed DC motors of this kind are turned by the engine and used as a generator (an LED, a resistor or a meter across the leads) or as a load on the flywheel shaft.\n\nfeature  mm  from\ncan  Ø24.4 × 30.8  Mabuchi RF-370CA\nfront and rear boss  Ø6.45 × 1.7  Mabuchi RF-370CA\nshaft  Ø2.0 × 42.0 long  Mabuchi RF-370CA\nshaft beyond the front boss  10.5  Mabuchi RF-370CA\nend cap to shaft tip  43.0  Mabuchi RF-370CA\nface holes  2 × M3 × 0.5 on 17.0  Mabuchi RF-370CA, RCDrone\nterminal spacing  18.3  Mabuchi RF-370CA, RCDrone\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Mabuchi Motor (hosted by IBS Electronics): RF-370CA datasheet and dimension drawing — PDF — manufacturer datasheet [verify license at link] — https://datasheets.ibselectronics.com/RF370CA-15370-Mabuchi-datasheet-7281042.pdf\n- RCDrone: 370 brushed motor listing with drawing values: Ø24.4 × 30.8, boss Ø6.5 × 1.5, M3 on 17, terminals 18.3 apart — web — listing [verify license at link] — https://rcdrone.top/ja/products/rs370-brushed-dc-motor-quantity-packs\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/dc-motor-370-size/index.json\nAPI: https://xemstudio.com/api/geometry?object=dc-motor-370-size\n",
 "sources": [
  {
   "publisher": "Mabuchi Motor (hosted by IBS Electronics)",
   "title": "RF-370CA datasheet and dimension drawing",
   "url": "https://datasheets.ibselectronics.com/RF370CA-15370-Mabuchi-datasheet-7281042.pdf",
   "formats": [
    "PDF"
   ],
   "license": "manufacturer datasheet",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "RCDrone",
   "title": "370 brushed motor listing with drawing values: Ø24.4 × 30.8, boss Ø6.5 × 1.5, M3 on 17, terminals 18.3 apart",
   "url": "https://rcdrone.top/ja/products/rs370-brushed-dc-motor-quantity-packs",
   "formats": [
    "web"
   ],
   "license": "listing",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "jga25-370-gearmotor",
  "dc-motor-380-size",
  "dc-motor-130-size",
  "spur-gears-involute",
  "socket-head-cap-screws-metric"
 ],
 "fits": [
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "socket-head-cap-screws-metric",
     "why": "two M3 into the face holes, 17.0 apart"
    },
    {
     "slug": "spur-gears-involute",
     "why": "module 0.5 gears with a Ø2 bore on the Ø2.0 shaft (press)"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "jga25-370-gearmotor",
     "why": "the same can behind a 25 mm gearbox"
    },
    {
     "slug": "dc-motor-380-size",
     "why": "bigger Ø27.7 can"
    }
   ]
  }
 ],
 "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": "shaft",
   "exact": "Ø2.0",
   "mates": "pinion, pulley or gear bore (pressed on)",
   "fit": "press",
   "files": "dc-370-"
  },
  {
   "feature": "front boss",
   "exact": "Ø6.45 × 1.7",
   "mates": "mount recess",
   "fit": "socket",
   "files": "dc-370-"
  },
  {
   "feature": "mounting holes",
   "exact": "2 × M3 × 0.5 on 17.0 (drawn 2.0 deep as position marks)",
   "mates": "M3 screws through the mount",
   "fit": "designed",
   "files": "dc-370-"
  },
  {
   "feature": "can",
   "exact": "Ø24.4",
   "mates": "cradle",
   "fit": "socket",
   "files": "dc-370-"
  }
 ],
 "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 are 370 motor dimensions?",
   "a": "Ø24.4 × 30.8 mm can, Ø2.0 shaft 10.5 beyond a Ø6.45 × 1.7 boss (43.0 from the end cap to the tip), two M3 holes 17.0 apart."
  },
  {
   "q": "What is the 370 motor hole spacing?",
   "a": "Two M3 × 0.5 tapped holes on 17.0 mm centres, either side of the boss."
  },
  {
   "q": "Is a 370 the same as a 380?",
   "a": "No: the 370 is a Ø24.4 can with M3 on 17.0; the 380 is a Ø27.7 can with M2.6 on 16.0."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "dc-370-size",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/dc-motor-370-size/dc-370-size.step",
   "stl": "https://xemstudio.com/files/hardware/dc-motor-370-size/dc-370-size.stl",
   "note": "370 size envelope: Ø24.4 × 30.8 can, Ø6.45 × 1.7 bosses front and rear, Ø2.0 shaft 10.5 beyond the boss, 2 × M3 on 17.0 (2.0 deep position marks)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/dc-motor-370-size/index.md"
}