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Pololu 20D 100:1 metal gearmotor 6 V (#3454): body, Ø4 shaft and M2.5 face-plate holes
What are the Pololu 20D 100:1 6 V gearmotor dimensions and face-plate mounting holes? · Modern device · basis: Pololu product page #3454 and the Pololu '20D mm Metal Gearmotors' dimension drawing; hole spacing cross-checked with the Pololu 20D bracket #1138 drawing.
Also called: Pololu 3454, Pololu #3454, 20Dx44L mm gearmotor, pololu 20d metal gearmotor, Pololu 100:1 Metal Gearmotor 20Dx44L mm 6V, Pololu 20D dimensions, 20D gearmotor face plate holes
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
- 62.1 mm
- width
- 20.0 mm
- height
- 20.0 mm
Notes
- Datum: motor axis along z, rear of the motor can at 0, output shaft toward +z.
- Motor can Ø20.0 × 25.1; gearbox Ø20.0 × 19.0 (L for 100:1), face plate at 44.1 from the rear.
- Output shaft Ø4.0 D-shaft extending 18.0 from the face plate (the D-flat is not dimensioned; drawn round).
- Two M2.5 threaded holes in the face plate, 15.0 apart on a line through the shaft (±7.5); maximum screw engagement 3.5 (modelled Ø2.5 × 3.5 deep).
- Gearbox length by ratio: 16.0 (25:1, 31:1), 17.5 (63:1, 78:1), 19.0 (100:1 to 195:1), 20.5 (250:1 to 488:1); 12 V, CB and extended-shaft versions share the face plate and shaft. Not modelled: rear motor terminals.
- Dimensions are exact nominal (true size), no tolerance added.
Pololu 20D 100:1 metal gearmotor 6 V (#3454): body, Ø4 shaft and… size chart
| feature | x (mm) | y (mm) | size |
|---|---|---|---|
| face-plate hole 1 | −7.5 | 0 | M2.5, 3.5 max engagement |
| face-plate hole 2 | +7.5 | 0 | M2.5, 3.5 max engagement |
| output shaft | 0 | 0 | Ø4.0 D, 18.0 long |
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 | 2 × M2.5, 15.0 apart, 3.5 max engagement | Pololu 20D bracket or a custom bracket, M2.5 screws | designed | all |
| output shaft | Ø4.0 D-shaft, 18.0 long | wheel hub, coupler or adapter | slide | all |
| gearbox body | Ø20.0 | 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 20Dx44L mm 6V (#3454) | web | Publisher's page; dimensions are facts |
| Pololu | 20D mm Metal Gearmotors dimension drawing | web | Publisher's page; dimensions are facts |
| Pololu | 20D gearmotor bracket #1138 dimensions | 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-20d-metal-gearmotor-100-1-6v | Pololu 20D 100:1 metal gearmotor 6 V (#3454): body, Ø4 shaft and M2.5 face-plate 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-20d-metal-gearmotor-100-1-6v
Fits with
Questions
What are the Pololu 20D face-plate holes?
Two M2.5 threaded holes 15.0 mm apart on a line through the shaft; use at most 3.5 mm of screw engagement.
How long is the 20D 100:1 gearmotor?
44.1 mm body (25.1 mm motor + 19.0 mm gearbox), Ø20 mm, plus an 18 mm Ø4 mm D-shaft: 62.1 mm overall.