# 775 brushed DC motor Ø42 × 66.7 mm, Ø5 shaft

> What are the 775 motor dimensions and mounting holes?

- Category: Hardware › Motion
- Kind: Hardware
- Basis: Common supplier drawings for the 775 brushed motor; values typical, verify on your unit
- Page: https://xemstudio.com/objects/775-dc-motor/ · JSON: https://xemstudio.com/api/geometry?object=775-dc-motor · Plain text: https://xemstudio.com/objects/775-dc-motor/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**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.

## Notes

- The 775 can is Ø42 × 66.7 mm with a 1.5 mm chamfer on the front edge.
- The front face has a Ø17.5 × 2 mm boss and a Ø5 shaft 17 mm long; 85.7 mm overall.
- Two M4 holes on 29 mm centres in the face are drawn as Ø4 plain bores 6 mm deep (the thread's major diameter).
- It is mounted by the face holes or in a Ø42 cradle (see Mating features).

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| 775 can | Ø42 | cradle | socket | motor-775* |
| 775 shaft | Ø5 | hub bore | slide | motor-775* |

## Sizes

| feature | size_mm |
|---|---|
| can | Ø42 × 66.7 |
| boss | Ø17.5 × 2 |
| shaft | Ø5 × 17 |
| face holes | 2 × M4 on 29 |
| overall | 85.7 |

## Where the files are

- Pololu: [Micro metal gearmotor dimension diagram](https://www.pololu.com/category/60/micro-metal-gearmotors) — PDF, STEP — Pololu site terms (verify at link)
- DFRobot: [TT geared motor drawing](https://www.dfrobot.com/product-100.html) — web — DFRobot site terms (verify at link)
- Wikipedia: [DC motor](https://en.wikipedia.org/wiki/DC_motor) — web — CC BY-SA 4.0 (text)

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/775-dc-motor/index.json

- motor-775: [STEP](https://xemstudio.com/files/hardware/dc-motors-775-n20-tt/motor-775.step) · [STL](https://xemstudio.com/files/hardware/dc-motors-775-n20-tt/motor-775.stl) — 775 brushed DC: Ø42 × 66.7, 2 × M4 on 29 mm (tapped, Ø4 plain bores), Ø5 shaft × 17

## How it fits

### Connects to
- [Flexible shaft couplers, 5–10 mm bores](https://xemstudio.com/objects/shaft-couplers/): Ø5 shaft into a coupler bore (slide)
- [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/): two M4 into the face holes

### Alternatives
- [NEMA 17 stepper motor](https://xemstudio.com/objects/nema-17-stepper/): a stepper where position control is needed

## Questions

**What are 775 motor dimensions?**

Ø42 × 66.7 mm body, Ø5 shaft 17 mm long, two M4 holes 29 mm apart; 85.7 mm overall.

**What is the 775 shaft diameter?**

5 mm, 17 mm long, on a Ø17.5 × 2 boss.

## Fits with

- [N20 micro gearmotor 12 × 10 mm, Ø3 D-shaft](https://xemstudio.com/objects/n20-gearmotor/)
- [TT yellow gearmotor 70 × 22.5 × 18.5 mm, Ø5.5 double-D shafts](https://xemstudio.com/objects/tt-gearmotor/)
- [Flexible shaft couplers, 5–10 mm bores](https://xemstudio.com/objects/shaft-couplers/)
- [NEMA 17 stepper motor](https://xemstudio.com/objects/nema-17-stepper/)
- [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/)