JGA25-370 gearmotor: Ø25 gearbox on a 370 can, Ø4 D-shaft — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/jga25-370-gearmotor/  (CC BY 4.0)
Basis: RCDrone JGA25-370 listing (drawing values); the can matches Mabuchi's RF-370CA (Ø24.4 × 30.8). Envelope only: the outside of the motor at its published sizes. The windings, magnets, brushes and bearings inside are not drawn.
Catalog version: 2026-10-20

Sizes: see table below
- Envelope only: the outside of the motor at its published sizes. The windings, magnets, brushes and bearings inside are not drawn.
- A Ø25 spur gearbox in front of a 370 can (Ø24.4 × 30.8). The gearbox length L depends on the ratio: 17 (4.4:1, 9.6:1), 19 (21.3:1), 21 (35.5:1, 46.8:1), 23 (78:1, 103:1), 25 (171:1, 226:1), 27 (377:1, 500:1). Files: L = 17, 21 and 27.
- Output: a Ø4 shaft on the gearbox axis with a D-flat 3.5 across, 8 mm long at the tip; the shaft stands 12.1 mm from the gearbox face, including a Ø7 × 2.5 boss.
- Two M3 tapped holes 4.5 deep on 17 mm centres in the gearbox face, drawn at the major diameter.
- The rear boss (Ø6.4), terminals and any encoder are not drawn. The listing notes sizes can vary between batches.
- A gearmotor turned backwards by an engine runs the gearbox as a step-up; DIY Stirling builders use small gearmotors this way as low-speed generators.

feature  mm  from
gearbox  Ø25 × 17 to 27 (by ratio)  RCDrone
can  Ø24.4 × 30.8  RCDrone, Mabuchi RF-370CA
boss  Ø7 × 2.5  RCDrone
shaft  Ø4, D-flat 3.5 across × 8  RCDrone
shaft from the gearbox face  12.1  RCDrone
face holes  2 × M3 × 4.5 deep on 17  RCDrone

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- RCDrone: JGA25-370 gearmotor listing with drawing values: gearbox Ø25 × L by ratio, can Ø24.4 × 30.8, Ø4 D-shaft (3.5 across the flat) 12.1 out, boss Ø7 × 2.5, 2 × M3 × 4.5 deep on 17 — web — listing [verify license at link] — https://rcdrone.top/products/jga25-370-dc-gear-motor
- Mabuchi Motor (hosted by IBS Electronics): RF-370CA datasheet and dimension drawing — PDF — manufacturer datasheet [verify license at link] — https://datasheets.ibselectronics.com/RF370CA-15370-Mabuchi-datasheet-7281042.pdf

Free files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/jga25-370-gearmotor/index.json
API: https://xemstudio.com/api/geometry?object=jga25-370-gearmotor