Gears and transmission
Involute Spur Gear 84T Module 1.25
- Bounding box
- 107.5 × 107.5 × 15.0 mm
- Engine
- Precision B-rep
- Parameters
- 7
- Published
- October 15, 2026
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The prompt
Create a standard involute spur gear with 84 teeth, module 1.25 mm, and a 20 degree pressure angle. The pitch diameter must be 105 mm, the base diameter approximately 98.67 mm, and the outside diameter 107.5 mm. The circular pitch is 3.927 mm and the tooth thickness at the pitch circle is approximately 1.964 mm. Make the gear 15 mm thick. Use a standard full-depth involute tooth profile. Do not add a keyway. Keep the center bore simple and editable.
Parameters
| Name | Value | Range |
|---|---|---|
| Module | 1.25 mm | 0.5 – 5 |
| Number of Teeth | 84 teeth | 8 – 200 |
| Pressure Angle | 20 deg | 14.5 – 25 |
| Face Width (Thickness) | 15 mm | 2 – 50 |
| Helix Angle | 0 deg | -30 – 30 |
| Center Bore Diameter | 25 mm | 6 – 60 |
| Bore Lead-in Chamfer | 1 mm | 0 – 3 |
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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