Gears and transmission
Meshing Spur Gear Pair (m3, 20T/40T, 90 mm centers)
- Bounding box
- 185.9 × 125.8 × 28.0 mm
- Engine
- Precision B-rep
- Parameters
- 14
- Published
- November 14, 2026
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The prompt
A pair of meshing involute spur gears with a 3 mm module and 20-degree pressure angle, positioned at a center distance of 90 mm. On the left, a driving pinion gear with 20 teeth, 60 mm pitch diameter, 20 mm face width, a 20 mm central bore, and a 6 mm wide rectangular keyway. On the right, meshing with the pinion, a driven spur gear with 40 teeth, 120 mm pitch diameter, 20 mm face width, a 25 mm central bore with an 8 mm wide rectangular keyway, and a raised cylindrical hub of 45 mm outer diameter protruding 8 mm from the front face.
Parameters
| Name | Value | Range |
|---|---|---|
| Module | 3 mm | 1 – 6 |
| Center Distance | 90 mm | 60 – 200 |
| Pinion Teeth | 20 teeth | 10 – 40 |
| Pinion Face Width | 20 mm | 5 – 50 |
| Pinion Bore | 20 mm | 6 – 40 |
| Pinion Keyway Width | 6 mm | 2 – 12 |
| Pinion Keyway Depth | 3.3 mm | 1 – 8 |
| Driven Gear Teeth | 40 teeth | 20 – 80 |
| Driven Gear Face Width | 20 mm | 5 – 50 |
| Driven Gear Bore | 25 mm | 8 – 50 |
| Driven Keyway Width | 8 mm | 2 – 16 |
| Driven Keyway Depth | 3.3 mm | 1 – 10 |
| Hub Outer Diameter | 45 mm | 28 – 100 |
| Hub Protrusion | 8 mm | 2 – 30 |
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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