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540 size brushed DC motor: Ø35.8 × 50.0 mm, 2 × M3 on 25
What are the dimensions of a 540 size DC motor? · Hardware · basis: Mabuchi RS-540RH / RS-540SH dimension drawing; outside size also on Mabuchi's Let's Motorize line-up. 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 can is Ø35.8 × 50.0 mm.
- The Ø3.17 (1/8 in) shaft is drawn 13.0 mm out from the front face.
- Two M3 × 0.5 tapped holes on 25.0 mm centres, drawn at the major diameter 5.0 deep: the drawing allows screws 5.0 into the motor and no more.
- The front boss is Ø13.0 and the rear one Ø10.2; their heights did not come through in a form I could check, so neither is drawn. Clear Ø13.0 in a mount.
- Vent holes, terminal tabs and the wire exit are not drawn.
- 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 | Ø35.8 × 50.0 | Mabuchi RS-540, Let's Motorize |
| shaft | Ø3.17 | Mabuchi RS-540 |
| shaft from the face | 13.0 | Mabuchi RS-540 |
| face holes | 2 × M3 × 0.5 on 25.0 | Mabuchi RS-540 |
| usable screw length | 5.0 | Mabuchi RS-540 |
| front boss | Ø13.0 (height not given here) | Mabuchi RS-540 |
| rear boss | Ø10.2 (height not given here) | Mabuchi RS-540 |
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 | Ø3.17 | pinion, pulley or coupler bore (set screw) | slide | dc-540-* |
| mounting holes | 2 × M3 × 0.5 on 25.0, 5.0 usable depth | M3 screws through the mount | designed | dc-540-* |
| front boss (not drawn) | Ø13.0 | mount recess | socket | dc-540-* |
| can | Ø35.8 | cradle | socket | dc-540-* |
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 mikrocontroller.net) | RS-540RH / RS-540SH datasheet and dimension drawing | manufacturer datasheet verify | |
| Mabuchi Motor | Let's Motorize: motor line-up with outside size (length × diameter) and shaft Ø for FA-130RA, RE-140RA, RE-260RA, RE-280RA, RS-380PH, RS-540SH | web | manufacturer page 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-540-size | 540 size envelope: Ø35.8 × 50.0 can, Ø3.17 shaft 13.0 from the face, 2 × M3 on 25.0 drawn Ø3.0 × 5.0 (bosses not drawn) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=dc-motor-540-size
How it fits
Connects to
Socket head cap screws, M2–M8two M3 into the face holes, 25.0 apart, 5.0 max into the motorAlternatives
550 / 555 size brushed DC motorsame face, 57.0 can
775 brushed DC motor Ø42 × 66.7 mm, Ø5 shaftØ42 can, Ø5 shaftAlso needed
Through-hole LEDsan LED across the leads shows generator outputYou might also need
Questions
What are 540 motor dimensions?
Ø35.8 × 50.0 mm can, Ø3.17 shaft 13.0 from the face, two M3 holes 25.0 apart, Ø13.0 front boss.
What is the 540 motor hole spacing?
25.0 mm, two M3 × 0.5 tapped holes; screws no deeper than 5.0 mm into the motor.
540 vs 550?
Same Ø35.8 can, Ø13.0 boss and M3-on-25.0 face; the 550 can is 57.0 long instead of 50.0.