380 / 385 size brushed DC motor: Ø27.7 × 37.8 mm, 2 × M2.6 on 16 — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/dc-motor-380-size/ (CC BY 4.0) 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. 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. - 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. 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 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Mabuchi Motor (hosted by electro-tech-online): RS-380PH datasheet and dimension drawing — PDF — manufacturer datasheet [verify license at link] — https://www.electro-tech-online.com/custompdfs/2011/01/rs_380ph.pdf - 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 — PDF — manufacturer datasheets [verify license at link] — https://mikrocontroller.net/attachment/641472/Mabuchi_Motors_Complete.pdf - MonotaRO: RS-380PH listing: outside 37.8 × 27.7, shaft Ø2.3, tapped mounting — web — listing [verify license at link] — https://www.monotaro.com/p/0526/3983/ - MakerBazar: RS-385 listing: two M2.6 × 0.45 tapped holes on 16 mm centres — web — listing [verify license at link] — https://makerbazar.in/products/rs-385-dc-motor-6v-12v Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/dc-motor-380-size/index.json API: https://xemstudio.com/api/geometry?object=dc-motor-380-size