Traxxas 3950X 20-tooth 32-pitch gear — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/traxxas-3950x-gear-20-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm/  (sheet CC BY 4.0)
Basis: Maker's parts list (Traxxas)
Catalog version: 2026-10-20

Overall (mm): length 17.45, width 17.45, height 1.0
- Traxxas part 3950X: Gear, 20-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.
- 20-tooth 32-pitch gear, 20° involute, module 0.7937 mm, Ø17.46 OD, Ø3 bore — 1 mm reference (face width not printed).
- True size, no printing tolerance added.

dimension  value
part number  Traxxas 3950X
name (as printed)  Gear, 20-T pinion (32-p), heavy duty (machined, hardened steel) (fits 3mm shaft)/ set screw
size (as printed)  3mm; 20-T pinion; 32-p
teeth  20
pitch  32 diametral pitch (module 0.7937 mm)
pitch diameter  15.88 mm
outside diameter  17.46 mm (standard addendum)
bore  3 mm
face width  not printed
used in  Traxxas TRX-4 2021 Ford Bronco (1/10 crawler, 92076-4)

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Traxxas (sheet hosted by Monsterhopups): TRX-4 Unassembled Kit (Model 82016-4) parts list, REV. 230615 0246, p. 5 — web — Publisher's page; dimensions are facts — https://www.monsterhopups.de/media/image/storage/opc/anleitung_traxxas/82016-4_parts.pdf

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/traxxas-3950x-gear-20-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm/index.json
API: https://xemstudio.com/api/geometry?object=traxxas-3950x-gear-20-t-pinion-32-p-heavy-duty-machined-hardened-steel-fits-3mm