{
 "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-550-555-size",
 "name": "550 / 555 size brushed DC motor: Ø35.8 × 57.0 mm, 2 × M3 on 25",
 "kind": "hardware",
 "category": "Electronics",
 "group": "Motors",
 "year": null,
 "question": "What are the dimensions of a 550 or 555 size DC motor?",
 "tags": [
  "550",
  "555",
  "dc motor",
  "brushed motor",
  "rs-550",
  "rs-555",
  "motor",
  "motor envelope",
  "stirling"
 ],
 "aliases": [
  "550 motor dimensions",
  "555 motor dimensions",
  "rs-550 size",
  "rs-555 size",
  "555 motor mounting holes",
  "550 motor shaft",
  "555 motor step",
  "550 motor stl"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 2,
 "url": "https://xemstudio.com/objects/dc-motor-550-555-size/",
 "sheet_txt": "https://xemstudio.com/objects/dc-motor-550-555-size/sheet.txt",
 "sheet": {
  "basis": "Mabuchi RS-550PC and RS-555VC dimension drawings; can size and M3-on-25 face also on the RCDrone 555 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 550 and 555 share one can: Ø35.8 × 57.0 mm. Files: the 550 with its 13.2 mm shaft and the 555 with its 23.2 mm shaft, both measured from the front face.",
   "The Ø3.17 shaft carries a pinion or a pulley; the 555 sold for drills often has a pressed-on pinion, which is not drawn.",
   "Two M3 × 0.5 tapped holes on 25.0 mm centres, drawn at the major diameter 4.0 deep: the drawings allow screws 4.0 into the motor.",
   "Front boss Ø13.0, rear boss Ø10.2; their heights did not come through in a form I could check, so neither is drawn. The drawings' Ø38.5 maximum and the vent holes, terminals and wire exit are not drawn either.",
   "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",
     "Ø35.8 × 57.0",
     "Mabuchi RS-550PC / RS-555VC"
    ],
    [
     "shaft",
     "Ø3.17",
     "Mabuchi drawings"
    ],
    [
     "shaft from the face",
     "13.2 (550) / 23.2 (555)",
     "Mabuchi drawings"
    ],
    [
     "face holes",
     "2 × M3 × 0.5 on 25.0",
     "Mabuchi drawings, RCDrone"
    ],
    [
     "usable screw length",
     "4.0",
     "Mabuchi drawings"
    ],
    [
     "front boss",
     "Ø13.0 (height not given here)",
     "Mabuchi drawings"
    ],
    [
     "rear boss",
     "Ø10.2 (height not given here)",
     "Mabuchi drawings"
    ],
    [
     "overall on the drawing",
     "75.0 (550) / 85.0 (555)",
     "Mabuchi drawings"
    ]
   ]
  }
 },
 "sheet_text": "550 / 555 size brushed DC motor: Ø35.8 × 57.0 mm, 2 × M3 on 25 — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/dc-motor-550-555-size/  (CC BY 4.0)\nBasis: Mabuchi RS-550PC and RS-555VC dimension drawings; can size and M3-on-25 face also on the RCDrone 555 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 550 and 555 share one can: Ø35.8 × 57.0 mm. Files: the 550 with its 13.2 mm shaft and the 555 with its 23.2 mm shaft, both measured from the front face.\n- The Ø3.17 shaft carries a pinion or a pulley; the 555 sold for drills often has a pressed-on pinion, which is not drawn.\n- Two M3 × 0.5 tapped holes on 25.0 mm centres, drawn at the major diameter 4.0 deep: the drawings allow screws 4.0 into the motor.\n- Front boss Ø13.0, rear boss Ø10.2; their heights did not come through in a form I could check, so neither is drawn. The drawings' Ø38.5 maximum and the vent holes, terminals and wire exit are not drawn either.\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  Ø35.8 × 57.0  Mabuchi RS-550PC / RS-555VC\nshaft  Ø3.17  Mabuchi drawings\nshaft from the face  13.2 (550) / 23.2 (555)  Mabuchi drawings\nface holes  2 × M3 × 0.5 on 25.0  Mabuchi drawings, RCDrone\nusable screw length  4.0  Mabuchi drawings\nfront boss  Ø13.0 (height not given here)  Mabuchi drawings\nrear boss  Ø10.2 (height not given here)  Mabuchi drawings\noverall on the drawing  75.0 (550) / 85.0 (555)  Mabuchi drawings\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Mabuchi Motor (compiled catalogue, hosted by mikrocontroller.net): Carbon-brush and metal-brush motor datasheets incl. RS-360RH, RS-365SH, RS-385SH, RS-550PC, RS-555VC, RS-775VC dimension drawings — PDF — manufacturer datasheets [verify license at link] — https://mikrocontroller.net/attachment/641472/Mabuchi_Motors_Complete.pdf\n- RCDrone: 555 brushed motor listing with drawing values: Ø36 × 57, Ø3.175 shaft, two M3 on 25 — web — listing [verify license at link] — https://rcdrone.top/es/products/555-brushed-dc-motor-quantity-packs\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/dc-motor-550-555-size/index.json\nAPI: https://xemstudio.com/api/geometry?object=dc-motor-550-555-size\n",
 "sources": [
  {
   "publisher": "Mabuchi Motor (compiled catalogue, hosted by mikrocontroller.net)",
   "title": "Carbon-brush and metal-brush motor datasheets incl. RS-360RH, RS-365SH, RS-385SH, RS-550PC, RS-555VC, RS-775VC dimension drawings",
   "url": "https://mikrocontroller.net/attachment/641472/Mabuchi_Motors_Complete.pdf",
   "formats": [
    "PDF"
   ],
   "license": "manufacturer datasheets",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "RCDrone",
   "title": "555 brushed motor listing with drawing values: Ø36 × 57, Ø3.175 shaft, two M3 on 25",
   "url": "https://rcdrone.top/es/products/555-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": [
  "dc-motor-540-size",
  "775-dc-motor",
  "dc-motor-380-size",
  "socket-head-cap-screws-metric"
 ],
 "fits": [
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "socket-head-cap-screws-metric",
     "why": "two M3 into the face holes, 25.0 apart, 4.0 max into the motor"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "dc-motor-540-size",
     "why": "same face, 50.0 can"
    },
    {
     "slug": "775-dc-motor",
     "why": "Ø42 can, Ø5 shaft"
    }
   ]
  },
  {
   "role": "Also needed",
   "items": [
    {
     "slug": "leds-tht",
     "why": "an LED across the leads shows generator output"
    }
   ]
  }
 ],
 "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": "Ø3.17",
   "mates": "pinion, pulley or coupler bore (set screw)",
   "fit": "slide",
   "files": "dc-55"
  },
  {
   "feature": "mounting holes",
   "exact": "2 × M3 × 0.5 on 25.0, 4.0 usable depth",
   "mates": "M3 screws through the mount",
   "fit": "designed",
   "files": "dc-55"
  },
  {
   "feature": "front boss (not drawn)",
   "exact": "Ø13.0",
   "mates": "mount recess",
   "fit": "socket",
   "files": "dc-55"
  },
  {
   "feature": "can",
   "exact": "Ø35.8",
   "mates": "cradle",
   "fit": "socket",
   "files": "dc-55"
  }
 ],
 "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 555 motor dimensions?",
   "a": "Ø35.8 × 57.0 mm can, Ø3.17 shaft (23.2 mm from the face on Mabuchi's RS-555VC), two M3 holes 25.0 apart, Ø13.0 front boss."
  },
  {
   "q": "What is the 550 motor shaft size?",
   "a": "Ø3.17 (1/8 in), 13.2 mm from the face on Mabuchi's RS-550PC."
  },
  {
   "q": "550 vs 555?",
   "a": "Same can and face. The difference is inside and in the shaft length the maker fits."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "dc-550-size-shaft13.2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/dc-motor-550-555-size/dc-550-size-shaft13.2.step",
   "stl": "https://xemstudio.com/files/hardware/dc-motor-550-555-size/dc-550-size-shaft13.2.stl",
   "note": "550 size envelope: Ø35.8 × 57.0 can, Ø3.17 shaft 13.2 from the face, 2 × M3 on 25.0 drawn Ø3.0 × 4.0 (bosses not drawn)"
  },
  {
   "file": "dc-555-size-shaft23.2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/dc-motor-550-555-size/dc-555-size-shaft23.2.step",
   "stl": "https://xemstudio.com/files/hardware/dc-motor-550-555-size/dc-555-size-shaft23.2.stl",
   "note": "555 size envelope: Ø35.8 × 57.0 can, Ø3.17 shaft 23.2 from the face, 2 × M3 on 25.0 drawn Ø3.0 × 4.0 (bosses not drawn)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/dc-motor-550-555-size/index.md"
}