Mechanical parts
Three-Pole DC Motor Rotor Armature
- Bounding box
- 48.5 × 52.0 × 75.5 mm
- Engine
- Precision B-rep
- Parameters
- 18
- Published
- October 25, 2026
Download
Free to download and use. See the terms.
The prompt
Three-pole DC motor rotor armature, end view shaped like a three-pointed star (Y shape). Iron core with three separate T-shaped arms 120 degrees apart, each arm ending in a curved pole shoe. Three separate copper wire coils, one wound around each arm, with clear gaps between the coils. Thin steel shaft through the center. Behind the core, a tiny commutator: a short cylinder split into three copper segments with black insulating gaps. Compact, short and wide, core length about equal to its diameter. Isolated single part, hard-surface, crisp edges, copper and steel PBR, educational model.
Parameters
| Name | Value | Range |
|---|---|---|
| Core outer diameter | 52 mm | 30 – 100 |
| Core length (Z) | 52 mm | 30 – 100 |
| Central hub diameter | 20 mm | 10 – 40 |
| Arm stem width | 10 mm | 4 – 20 |
| Pole shoe inner radius | 17 mm | 12 – 40 |
| Pole shoe angle | 60 deg | 30 – 100 |
| Shaft diameter | 8 mm | 4 – 20 |
| Shaft front extension | 6 mm | 0 – 20 |
| Shaft rear extension | 8 mm | 0 – 20 |
| Coil tangential wall thickness | 2.5 mm | 1 – 5 |
| Coil axial wall thickness | 2.5 mm | 1 – 5 |
| Coil radial length | 12 mm | 4 – 20 |
| Coil overlap onto core | 0.5 mm | 0.1 – 1 |
| Commutator diameter | 15 mm | 10 – 40 |
| Commutator length | 8 mm | 3 – 20 |
| Commutator gap from core | 1.5 mm | 0.5 – 5 |
| Commutator insulating slot width | 1.2 mm | 0.4 – 4 |
| Commutator central hub diameter | 10 mm | 4 – 20 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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