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Pololu 37D metal gearmotor (100:1, #4745): Ø36.8 body, 6 mm shaft and M3 face-mount holes
What are the Pololu 37D metal gearmotor dimensions, shaft and mounting holes? · Modern device · basis: Pololu product page #4745 and the Pololu 37D metal gearmotor dimension diagram.
Also called: Pololu 37D metal gearmotor, pololu 37d, Pololu 4745, 100:1 Metal Gearmotor 37Dx57L mm 12V, pololu 37d metal gearmotor dimensions, pololu 37d mounting holes, rover wheel motor
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- length
- 79.0 mm
- width
- 36.8 mm
- height
- 36.8 mm
Notes
- Datum: motor axis on Z, centred on X and Y; back of the motor can on z=0, gearbox face plate at z=57.0.
- Body Ø36.8 × 57.0 (100:1, no encoder); central boss Ø12.0 × 6.0; output shaft Ø6.0 D-shaft × 16.0, ending at z=79.0.
- Six M3 tapped holes in the face plate, 3.0 mm max screw engagement, on a Ø31.0 bolt circle (hexagon, 15.5 between neighbours), first hole on +X.
- Gearbox length varies with ratio: 21.5 (19:1, 30:1), 24.0 (50:1, 70:1), 26.5 (100:1, 131:1, 150:1); encoder versions add a rear encoder.
- Modelled: body as one Ø36.8 cylinder, boss, shaft (flat not modelled), face holes. Not modelled: rear terminals.
- Exact nominal mm.
Pololu 37D metal gearmotor (100:1, #4745): Ø36.8 body, 6 mm shaft… size chart
| hole | x (mm) | y (mm) | thread |
|---|---|---|---|
| 1 | 15.5 | 0 | M3 |
| 2 | 7.75 | 13.42 | M3 |
| 3 | -7.75 | 13.42 | M3 |
| 4 | -15.5 | 0 | M3 |
| 5 | -7.75 | -13.42 | M3 |
| 6 | 7.75 | -13.42 | M3 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| Face-plate holes | 6 × M3 on Ø31.0, 3.0 deep max | M3 screws through an L-bracket | designed | all |
| Output shaft | Ø6.0 D-shaft, 16.0 long | 6 mm wheel hub or coupler | slide | all |
| Gearbox body | Ø36.8 | clamp-style motor mount | clamp | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Pololu | 100:1 Metal Gearmotor 37Dx57L mm 12V (#4745) | web | Publisher's page; dimensions are facts |
| Pololu | Dimensions of the 37D metal gearmotors (PDF) | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| pololu-37d-metal-gearmotor | Pololu 37D metal gearmotor (100:1, #4745): Ø36.8 body, 6 mm shaft and M3 face-mount holes | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=pololu-37d-metal-gearmotor
Fits with
Questions
What is the Pololu 37D mounting-hole pattern?
Six M3 tapped holes on a Ø31.0 mm bolt circle in the gearbox face, max 3.0 mm screw engagement.
What shaft does the 37D have?
Ø6.0 mm D-shaft, 16.0 mm long, from a Ø12.0 × 6.0 mm boss.
How long is the 37D gearmotor?
For 100:1: 57.0 mm body plus 22.0 mm boss and shaft, 79.0 mm overall; shorter ratios have shorter gearboxes.