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JGA25-370 gearmotor: Ø25 gearbox on a 370 can, Ø4 D-shaft
What are the dimensions of a JGA25-370 gear motor? · Hardware · 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.
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. Mating features
- sizes
- 6 in table
Notes
- 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.
Sizes
| 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 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| output shaft | Ø4, D-flat 3.5 across × 8 | hub, collar or gear bore (set screw on the flat) | slide | jga25-* |
| front boss | Ø7 × 2.5 | mount recess | socket | jga25-* |
| mounting holes | 2 × M3 × 4.5 deep on 17 | M3 screws through the mount | designed | jga25-* |
| gearbox | Ø25 | cradle or clamp | socket | jga25-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| 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 |
| Mabuchi Motor (hosted by IBS Electronics) | RF-370CA datasheet and dimension drawing | manufacturer datasheet verify |
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
| jga25-370-gearbox-17 | JGA25-370 envelope, gearbox Ø25 × 17: 370 can Ø24.4 × 30.8, boss Ø7 × 2.5, Ø4 D-shaft (3.5 across the flat, flat 8 long) 12.1 from the gearbox face, 2 × M3 × 4.5 deep on 17 | STEP · STL |
| jga25-370-gearbox-21 | JGA25-370 envelope, gearbox Ø25 × 21: 370 can Ø24.4 × 30.8, boss Ø7 × 2.5, Ø4 D-shaft (3.5 across the flat, flat 8 long) 12.1 from the gearbox face, 2 × M3 × 4.5 deep on 17 | STEP · STL |
| jga25-370-gearbox-27 | JGA25-370 envelope, gearbox Ø25 × 27: 370 can Ø24.4 × 30.8, boss Ø7 × 2.5, Ø4 D-shaft (3.5 across the flat, flat 8 long) 12.1 from the gearbox face, 2 × M3 × 4.5 deep on 17 | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=jga25-370-gearmotor
How it fits
Connects to
Set-screw shaft collars Ø3 to Ø12Ø4 collar on the output shaft (slide)
Spur gears, involute 20°module 1 16 T gear with a Ø4 bore on the shaft (slide)
Socket head cap screws, M2–M8two M3 into the gearbox face, 17 apart, 4.5 maxAlternatives
N20 micro gearmotor 12 × 10 mm, Ø3 D-shaftmuch smaller 12 × 10 gearmotor
370 size brushed DC motorthe same can without the gearboxYou might also need
Questions
What are JGA25-370 dimensions?
Ø25 gearbox 17–27 long by ratio, on a Ø24.4 × 30.8 can; Ø4 D-shaft 12.1 out (incl. a Ø7 × 2.5 boss); two M3 holes 17 mm apart, 4.5 deep.
What shaft does a JGA25-370 have?
Ø4 mm with a D-flat 3.5 mm across, 8 mm long, on the gearbox axis.
How long is the JGA25-370 gearbox?
17 mm at 4.4:1 and 9.6:1, up to 27 mm at 377:1 and 500:1.