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380 / 385 size brushed DC motor: Ø27.7 × 37.8 mm, 2 × M2.6 on 16
What are the dimensions of a 380 size DC motor? · Hardware · basis: Mabuchi RS-380PH and RS-385SH dimension drawings (identical outside sizes); outside size also on the MonotaRO RS-380PH listing, hole spacing on the MakerBazar RS-385 listing. 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
- 7 in table
Notes
- Envelope only: the outside of the motor at its published sizes. The windings, magnets, brushes and bearings inside are not drawn.
- The 380 and 385 share one envelope: a Ø27.7 × 37.8 can with a Ø10.0 × 2.6 boss on each end.
- The Ø2.3 shaft runs 16.4 mm out from the front face. The drawing's 57.0 overall is 0.2 longer than the drawn parts.
- Two M2.6 × 0.45 tapped holes on 16.0 mm centres, drawn at the major diameter 3.0 deep (the usable screw length on the drawing).
- Vent holes, terminal tabs and the wire exit are not drawn. The drawing's Ø29.2 maximum is over the end-cap terminals.
- In DIY Stirling builds, brushed DC motors of this kind are turned by the engine and used as a generator (an LED, a resistor or a meter across the leads) or as a load on the flywheel shaft.
Sizes
| feature | mm | from |
|---|---|---|
| can | Ø27.7 × 37.8 | Mabuchi RS-380PH / RS-385SH, MonotaRO |
| front and rear boss | Ø10.0 × 2.6 | Mabuchi drawings |
| shaft | Ø2.3 | Mabuchi drawings |
| shaft from the face | 16.4 | Mabuchi drawings |
| face holes | 2 × M2.6 × 0.45 on 16.0 | Mabuchi drawings, MakerBazar |
| usable screw length | 3.0 | Mabuchi drawings |
| largest Ø (terminals) | 29.2 | Mabuchi drawings |
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 |
|---|---|---|---|---|
| shaft | Ø2.3 | pinion or pulley bore (pressed on) | press | dc-380-* |
| front boss | Ø10.0 × 2.6 | mount recess | socket | dc-380-* |
| mounting holes | 2 × M2.6 × 0.45 on 16.0, 3.0 usable depth | M2.6 screws through the mount | designed | dc-380-* |
| can | Ø27.7 | cradle | socket | dc-380-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Mabuchi Motor (hosted by electro-tech-online) | RS-380PH datasheet and dimension drawing | manufacturer datasheet verify | |
| Mabuchi Motor (compiled catalogue, hosted by mikrocontroller.net) | Carbon-brush and metal-brush motor datasheets incl. RS-360RH, RS-365SH, RS-385SH, RS-550PC, RS-555VC, RS-775VC dimension drawings | manufacturer datasheets verify | |
| MonotaRO | RS-380PH listing: outside 37.8 × 27.7, shaft Ø2.3, tapped mounting | web | listing verify |
| MakerBazar | RS-385 listing: two M2.6 × 0.45 tapped holes on 16 mm centres | web | listing verify |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| dc-380-385-size | 380 / 385 size envelope: Ø27.7 × 37.8 can, Ø10.0 × 2.6 bosses front and rear, Ø2.3 shaft 16.4 from the face, 2 × M2.6 on 16.0 drawn Ø2.6 × 3.0 | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=dc-motor-380-size
How it fits
Alternatives
360 / 365 size brushed DC motorsame face, 32.6 can
390 size brushed DC motorsame 16 mm hole spacing, longer can
540 size brushed DC motorbigger Ø35.8 can, Ø3.17 shaftAlso needed
Through-hole LEDsan LED across the leads shows generator outputYou might also need
Questions
What are 380 motor dimensions?
Ø27.7 × 37.8 mm can, Ø2.3 shaft 16.4 mm from the face, Ø10.0 × 2.6 bosses, two M2.6 holes 16.0 apart.
What is the 385 motor mounting hole spacing?
16.0 mm, two M2.6 × 0.45 tapped holes; screws no deeper than 3.0 mm into the motor. Same as the 380.
380 vs 385?
The same outside: can, face, holes and shaft. They differ inside (windings, brushes).