Xem Studiomeasured geometryDC motors: 775, N20 gearmotor, TT gearmotor
What are the 775 motor dimensions and mounting holes? · Hardware · basis: Common supplier drawings for the 775 brushed motor, N20 micro gearmotor and the yellow TT gearmotor; values typical, verify on your unit
- sizes
- 3 in table
Notes
- 775: Ø42 mm can, 66.7 mm long, two M4 mounting holes on 29 mm centres in the face, Ø17.5 × 2 mm boss, Ø5 mm shaft 17 mm long.
- N20: 12 × 10 mm section, 15 mm motor + gearbox 9–12 mm depending on ratio; Ø3 mm D-shaft 9–10 mm long; two M1.6 face holes 9 mm apart.
- TT (yellow, 1:48): 70 × 22.5 × 18.5 mm overall with the motor, 5.5 mm double-D shaft both sides, two Ø3.2 mounting holes 17.6 mm apart on the gearbox; many clones vary by ±0.5 mm.
Sizes
| motor | section_mm | length_mm | shaft | mounting |
|---|---|---|---|---|
| 775 | Ø42 | 66.7 | Ø5 × 17 | 2 × M4 @ 29 mm |
| N20 | 12 × 10 | 24–27 with gearbox | Ø3 D × 10 | 2 × M1.6 @ 9 mm |
| TT | 22.5 × 18.5 | 70 | 5.5 double-D | 2 × Ø3.2 @ 17.6 mm (gearbox) |
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 3 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| motor-775 | 775 brushed DC: Ø42 × 66.7, 2 × M4 on 29 mm, Ø5 shaft × 17 | STEP · STL |
| motor-n20-9mm-gearbox | N20 micro gearmotor: 12 × 10 × 15 motor + 9 mm gearbox, Ø3 D-shaft × 10 | STEP · STL |
| motor-tt-dual-shaft | TT yellow gearmotor envelope: 70 × 22.5 × 18.5, 5.5 mm double-D shafts | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=dc-motors-775-n20-tt
Fits with
Questions
What are 775 motor dimensions?
Ø42 mm × 66.7 mm body, Ø5 mm shaft 17 mm long, two M4 holes 29 mm apart. Runs 12–24 V; needs a Ø42.3 mm printed cradle or the face holes.
What is the N20 motor shaft size?
3 mm D-shaft, about 9–10 mm long; Pololu-style brackets clamp the 12 × 10 mm body.
What are TT motor mounting dimensions?
Two Ø3.2 holes 17.6 mm apart on the gearbox side; body 70 × 22.5 × 18.5 mm; 5.5 mm double-D shaft for the standard 65 mm yellow wheels.