Xem Studiomeasured geometryN20 micro gearmotor 12 × 10 mm, Ø3 D-shaft
What is the N20 motor size and shaft diameter? · Hardware · basis: Common supplier drawings for the N20 micro metal gearmotor; gearbox length varies by ratio
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 5 in table
Notes
- The N20 is 12 × 10 mm in section: a 15 mm motor with R2 rounded edges plus a gearbox 9–12 mm long depending on ratio; the file has the 9 mm gearbox (24 mm body).
- The output is a Ø3 D-shaft, 2.5 mm across the flat, 10 mm long; 34 mm overall.
- The gearbox face has two M1.6 holes 9 mm apart, drawn as Ø1.6 × 4 deep.
Sizes
| feature | size_mm |
|---|---|
| section | 12 × 10 |
| motor | 15 |
| gearbox (this file) | 9 |
| shaft | Ø3 D, 2.5 across flat × 10 |
| face holes | 2 × M1.6 on 9 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| N20 shaft | Ø3 D (2.5 across the flat) | wheel hub | press | motor-n20-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Pololu | Micro metal gearmotor dimension diagram | PDF, STEP | Pololu site terms verify |
| DFRobot | TT geared motor drawing | web | DFRobot site terms verify |
| Wikipedia | DC motor | web | CC BY-SA 4.0 (text) |
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
| motor-n20-9mm-gearbox | N20 micro gearmotor: 12 × 10 × 15 motor + 9 mm gearbox, Ø3 D-shaft (2.5 across the flat) × 10 | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=n20-gearmotor
How it fits
Connects to
Flexible shaft couplers, 5–10 mm boresØ3 D-shaft into a wheel or coupler hub (press)Alternatives
TT yellow gearmotor 70 × 22.5 × 18.5 mm, Ø5.5…larger plastic-gearbox motorYou might also need
Questions
What is the N20 motor shaft size?
3 mm D-shaft, 2.5 mm across the flat, about 10 mm long.
How long is an N20 gearmotor?
15 mm motor plus a 9–12 mm gearbox; the file is 24 mm body, 34 mm with the shaft.