2204 brushless outrunner: Ø27.9 × 29.2 mm, 16 × 19 M3 mount — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/brushless-outrunner-2204/ (CC BY 4.0) Basis: RCDrone listing of the EMAX MT2204 II drawing values. 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. - 2204 names the stator: 22 mm diameter, 4 mm tall. The outside below is one maker's 2204; bell size, shaft and mount differ between makers. - The bell is Ø27.9 and the motor is 29.2 mm tall overall, of which 12.5 is the Ø5 shaft above the bell; the top 7.5 of it is the M5 prop thread (drawn plain at Ø5). The base below the bell is drawn at the bell Ø as an envelope. - Base mount: four M3 holes in a cross, two 16 mm apart and two 19 mm apart. The listing gives no thread depth, so they are drawn Ø3.0 × 3.0 deep only to mark them. - The leads and the Ø8 centre boss on the drawing are not drawn (its height is not given). - In DIY Stirling builds, brushless outrunners are driven by the engine as three-phase generators; the AC from the three leads is rectified for a load. feature mm from bell Ø27.9 RCDrone / EMAX MT2204 II overall height 29.2 RCDrone / EMAX MT2204 II bell and base height 16.7 (29.2 − 12.5) RCDrone / EMAX MT2204 II shaft above the bell Ø5 × 12.5, M5 thread 7.5 RCDrone / EMAX MT2204 II base holes 4 × M3, cross 16 × 19 RCDrone / EMAX MT2204 II stator 22 × 4 (the name) size name Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - RCDrone (EMAX MT2204 II drawing values): 2204 outrunner: Ø27.9, 29.2 overall, M5 shaft 12.5 out (7.5 threaded), 4 × M3 on 16 and 19 — web — listing [verify license at link] — https://rcdrone.top/products/mt2204%E2%85%B1-2600kv-brushless-motor-with-cw-ccw-options Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/brushless-outrunner-2204/index.json API: https://xemstudio.com/api/geometry?object=brushless-outrunner-2204