Gears and transmission
12T Spur Gear – Ø2.30 Transverse Hole at Z 8.780
- Bounding box
- 10.3 × 10.3 × 12.0 mm
- Engine
- Precision B-rep
- Parameters
- 8
- Published
- October 14, 2026
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The prompt
Use my previously verified STEP gear with the exact Ø7.100 mm root diameter as the reference. Change only the transverse hole diameter to Ø2.300 mm and its center position to Z = 8.780 mm. Preserve the original 12-tooth geometry exactly, including the true Ø7.100 mm root diameter, Ø10.500 mm outside diameter, and all tooth profiles. Do not regenerate or redesign the teeth. Maintain the Ø5.000 mm axial bore, Ø9.000 mm hub, 7.530 mm gear face width, 4.470 mm hub extension, and 12.000 mm total length. Export a valid STEP solid in millimeters.
Parameters
| Name | Value | Range |
|---|---|---|
| Module | 0.75 mm | 0.3 – 3 |
| Number of Teeth | 12 teeth | 8 – 60 |
| Gear Face Width | 7.53 mm | 3 – 25 |
| Hub Diameter | 9 mm | 5 – 30 |
| Hub Extension | 4.47 mm | 0.5 – 30 |
| Axial Bore Diameter | 5 mm | 2 – 20 |
| Transverse Hole Diameter | 2.3 mm | 0.5 – 6 |
| Transverse Hole Center Z | 8.78 mm | 7.6 – 12 |
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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