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550 / 555 size brushed DC motor: Ø35.8 × 57.0 mm, 2 × M3 on 25

What are the dimensions of a 550 or 555 size DC motor? · Hardware · basis: Mabuchi RS-550PC and RS-555VC dimension drawings; can size and M3-on-25 face also on the RCDrone 555 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
8 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 550 and 555 share one can: Ø35.8 × 57.0 mm. Files: the 550 with its 13.2 mm shaft and the 555 with its 23.2 mm shaft, both measured from the front face.
  • The Ø3.17 shaft carries a pinion or a pulley; the 555 sold for drills often has a pressed-on pinion, which is not drawn.
  • Two M3 × 0.5 tapped holes on 25.0 mm centres, drawn at the major diameter 4.0 deep: the drawings allow screws 4.0 into the motor.
  • Front boss Ø13.0, rear boss Ø10.2; their heights did not come through in a form I could check, so neither is drawn. The drawings' Ø38.5 maximum and the vent holes, terminals and wire exit are not drawn either.
  • 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

featuremmfrom
canØ35.8 × 57.0Mabuchi RS-550PC / RS-555VC
shaftØ3.17Mabuchi drawings
shaft from the face13.2 (550) / 23.2 (555)Mabuchi drawings
face holes2 × M3 × 0.5 on 25.0Mabuchi drawings, RCDrone
usable screw length4.0Mabuchi drawings
front bossØ13.0 (height not given here)Mabuchi drawings
rear bossØ10.2 (height not given here)Mabuchi drawings
overall on the drawing75.0 (550) / 85.0 (555)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.

featureexactmates withfitfiles
shaftØ3.17pinion, pulley or coupler bore (set screw)slidedc-55*
mounting holes2 × M3 × 0.5 on 25.0, 4.0 usable depthM3 screws through the mountdesigneddc-55*
front boss (not drawn)Ø13.0mount recesssocketdc-55*
canØ35.8cradlesocketdc-55*

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

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 drawingsPDFmanufacturer datasheets verify
RCDrone555 brushed motor listing with drawing values: Ø36 × 57, Ø3.175 shaft, two M3 on 25weblisting verify

Free files

★ Free files 2 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

dc-550-size-shaft13.2550 size envelope: Ø35.8 × 57.0 can, Ø3.17 shaft 13.2 from the face, 2 × M3 on 25.0 drawn Ø3.0 × 4.0 (bosses not drawn)STEP · STL
dc-555-size-shaft23.2555 size envelope: Ø35.8 × 57.0 can, Ø3.17 shaft 23.2 from the face, 2 × M3 on 25.0 drawn Ø3.0 × 4.0 (bosses not drawn)STEP · STL

Plain text: sheet.txt · JSON: /api/geometry?object=dc-motor-550-555-size

550 / 555 size brushed DC motor: Ø35.8 × 57.0 mm, 2 × M3 on 25, isometric render of a generated part
Render of dc-550-size-shaft13.2 from the free STEP; not to scale.

How it fits

Connects to

Socket head cap screws, M2–M8two M3 into the face holes, 25.0 apart, 4.0 max into the motor

Alternatives

540 size brushed DC motorsame face, 50.0 can775 brushed DC motor Ø42 × 66.7 mm, Ø5 shaftØ42 can, Ø5 shaft

Also needed

Through-hole LEDsan LED across the leads shows generator output

You might also need

380 / 385 size brushed DC motor: Ø27.7 × 37.8 mm, 2 × M2.6 on 16, isometric render of a generated part
380 / 385 size brushed DC motor: Ø27.7 × 37.8 mm, 2 × M2.6 on 167 sizes★ 1 file

Questions

What are 555 motor dimensions?

Ø35.8 × 57.0 mm can, Ø3.17 shaft (23.2 mm from the face on Mabuchi's RS-555VC), two M3 holes 25.0 apart, Ø13.0 front boss.

What is the 550 motor shaft size?

Ø3.17 (1/8 in), 13.2 mm from the face on Mabuchi's RS-550PC.

550 vs 555?

Same can and face. The difference is inside and in the shaft length the maker fits.