# Traxxas 3947X 17-tooth 32-pitch gear

> What size is Traxxas 3947X gear?

- Category: RC cars › Pinions & spur gears
- Kind: Modern device
- Basis: Maker's parts list (Traxxas)
- Page: https://xemstudio.com/objects/traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm/ · JSON: https://xemstudio.com/api/geometry?object=traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm · Plain text: https://xemstudio.com/objects/traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 14.99 | 15.06 | 1.0 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Traxxas part 3947X: Gear, 17-T pinion (32-p), heavy duty (machined, hardened steel) (fits 3mm shaft)/ set screw. Size exactly as printed in Traxxas's parts list; the file is built from that size only.
- 17-tooth 32-pitch gear, 20° involute, module 0.7937 mm, Ø15.08 OD, Ø3 bore — 1 mm reference (face width not printed).
- True size, no printing tolerance added.

## Sizes

| dimension | value |
|---|---|
| part number | Traxxas 3947X |
| name (as printed) | Gear, 17-T pinion (32-p), heavy duty (machined, hardened steel) (fits 3mm shaft)/ set screw |
| size (as printed) | 3mm; 17-T pinion; 32-p |
| teeth | 17 |
| pitch | 32 diametral pitch (module 0.7937 mm) |
| pitch diameter | 13.49 mm |
| outside diameter | 15.08 mm (standard addendum) |
| bore | 3 mm |
| face width | not printed |
| used in | Traxxas TRX-4 2021 Ford Bronco (1/10 crawler, 92076-4) |

## Where the files are

- Traxxas (sheet hosted by Monsterhopups): [TRX-4 Unassembled Kit (Model 82016-4) parts list, REV. 230615 0246, p. 5](https://www.monsterhopups.de/media/image/storage/opc/anleitung_traxxas/82016-4_parts.pdf) — web — Publisher's page; dimensions are facts

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

Index: https://xemstudio.com/files/hardware/traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm/index.json

- traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm-profile: [STEP](https://xemstudio.com/files/hardware/traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm/traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm-profile.step) · [STL](https://xemstudio.com/files/hardware/traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm/traxxas-3947x-gear-17-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm-profile.stl) — 17-tooth 32-pitch gear, 20° involute, module 0.7937 mm, Ø15.08 OD, Ø3 bore — 1 mm reference (face width not printed)

## Questions

**What size is Traxxas 3947X gear?**

Traxxas 3947X 17-tooth 32-pitch gear

## Fits with

- [Traxxas TRX-4 kit (82016-4) parts list](https://xemstudio.com/objects/traxxas-trx-4-2021-ford-bronco-parts-list/)
- [Traxxas TRX-4 2021 Ford Bronco (1/10 crawler, 92076-4)](https://xemstudio.com/objects/traxxas-trx-4-2021-ford-bronco/)