Gears and transmission
Spur Gear with Hub and Step Collar
- Bounding box
- 80.0 × 77.2 × 40.0 mm
- Engine
- Precision B-rep
- Parameters
- 11
- Published
- November 4, 2026
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The prompt
Create a 3D model of a mechanical gear based on the following precise dimensions:Overall width: Total length along the central axis is 40 mm. Main body / Hub diameter: Outer diameter of the main cylindrical hub is $\emptyset 60$ mm, with a central through-hole of $\emptyset 30$ mm. Gear rim / Outer diameter: The outer diameter across the teeth is $\emptyset 80$ mm, and the width of the toothed section is 15 mm. Teeth details: There are 10 teeth ($10\times$) around the perimeter. Step and shoulder dimensions: One side features a stepped collar with a diameter of $\emptyset 32$ mm (or matching the hub transition), set at a distance of 6 mm or 5 mm from the reference faces. Cross-drilled hole: A radial cross-hole of $\emptyset 8$ mm passes through the hub wall perpendicularly. Fillets and chamfers: Include rounding fillets with $R1$ and $R2$ where specified on the drawing transitions."
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Width | 40 mm | 20 – 80 |
| Hub Diameter | 60 mm | 40 – 100 |
| Bore Diameter | 30 mm | 10 – 50 |
| Gear Outer Diameter | 80 mm | 60 – 120 |
| Gear Band Width | 15 mm | 5 – 35 |
| Teeth Count | 10 | 6 – 30 |
| Step Collar Diameter | 32 mm | 30 – 60 |
| Step Collar Length | 6 mm | 2 – 15 |
| Cross Hole Diameter | 8 mm | 2 – 12 |
| Fillet R1 (Step Transition) | 1 mm | 0 – 5 |
| Fillet R2 (End Face Transition) | 2 mm | 0 – 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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