Brackets and mounts
Opel Omega B Sunroof Knob (provisional)
- Bounding box
- 21.8 × 21.8 × 21.0 mm
- Engine
- Precision B-rep
- Parameters
- 15
- Published
- October 19, 2026
Download
Free to download and use. See the terms.
The prompt
Create a 3D CAD model of the **rotary sunroof control knob for a 1998 Opel Omega B**. The part is an automotive interior rotary knob located in the overhead roof console. It should resemble an original OEM-style component from the late-1990s Opel Omega B. **Design requirements:** - Create a compact, rounded rotary knob with a smooth cylindrical or gently tapered exterior and softly rounded edges. - Include a central mounting stem on the underside, intended to connect to the original sunroof switch mechanism. - If appropriate, include a keyed shaft, retaining feature, or internal socket for secure rotation. - Keep the visible top surface clean and suitable for a subtle factory-style indicator mark. - Use a single solid body for the initial model. - Use millimeters and create editable parametric geometry. - Design for FDM 3D printing, with practical wall thicknesses and printable geometry. - Avoid decorative features, oversized proportions, or a futuristic appearance. Aim for a realistic OEM replacement part. **Important dimensional constraint:** The exact original dimensions and shaft geometry are not yet measured. Do not claim the model is an exact factory replica. Create a preliminary concept with adjustable parameters for knob diameter, overall height, shaft diameter, shaft length, and retaining features. Clearly identify these as provisional dimensions. Prioritize a simple, mechanically plausible replacement knob that can later be adapted to measurements of the original switch. Export the editable CAD model as STEP and a printable STL file.
Parameters
| Name | Value | Range |
|---|---|---|
| Knob Diameter (base) | 22 mm | 14 – 34 |
| Knob Diameter (top) | 20 mm | 12 – 34 |
| Knob Height | 12 mm | 6 – 22 |
| Top Edge Radius | 2 mm | 0.5 – 5 |
| Bottom Edge Radius | 1 mm | 0.2 – 3 |
| Stem Diameter | 6 mm | 3 – 12 |
| Stem Length Below Knob | 9 mm | 3 – 20 |
| Keyed Flat Across Width | 5 mm | 2.5 – 11 |
| Retaining Groove Diameter | 4.4 mm | 2 – 10 |
| Retaining Groove Width | 1.2 mm | 0.6 – 3 |
| Groove Centre From Stem Tip | 2.5 mm | 1 – 8 |
| Stem Tip Lead-in Chamfer | 0.5 mm | 0.1 – 1.5 |
| Indicator Mark Length | 4.5 mm | 1 – 8 |
| Indicator Mark Width | 1.2 mm | 0.4 – 3 |
| Indicator Mark Depth | 0.5 mm | 0.2 – 1.5 |
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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