Gears and transmission
18T Gates Carbon Drive Pulley
- Bounding box
- 71 × 70.5 × 10 mm
- Engine
- 3D Printing B-rep
- Parameters
- 11
- Published
- November 8, 2026
Download
Free to download and use. See the terms.
The prompt
A precision mechanical timing pulley sprocket with exactly 18 teeth, designed to be fully compatible with a Gates Carbon Drive bicycle belt (11mm pitch curvilinear tooth profile). The root radius (base of the teeth) must be exactly 31.5mm. The tooth height must be 4mm, making the outer tip radius exactly 35.5mm. Each tooth must have a width of 4mm at the top and a parabolic profile. The grooves (valleys) between teeth must be 7mm wide. The total face width (gear thickness) must be exactly 10mm. The center must feature a solid, integrated hub with a perfectly centered D-profile bore (flat-sided double-D shaft hole with 5.4mm diameter) specifically designed to mate with a standard Arduino yellow plastic DC gear motor spindle. Clean geometry, manifold, watertight 3D model, no textures, ready for 3D printing.
Parameters
| Name | Value | Range |
|---|---|---|
| Number of teeth | 18 mm | 8 – 60 |
| Root (valley) radius | 31.5 mm | 10 – 120 |
| Tooth height above root | 4 mm | 1 – 12 |
| Tooth tip width | 4 mm | 1 – 12 |
| Groove width at root circle | 7 mm | 1 – 16 |
| Face width / belt width | 10 mm | 3 – 40 |
| Parabolic flank bulge | 0.25 deg | 0 – 1.5 |
| Double-D bore round diameter | 5.4 mm | 2 – 25 |
| Double-D bore across flats | 4.4 mm | 1 – 25 |
| Bore clearance per side | 0.15 mm | 0 – 0.6 |
| Segments per flank and tooth tip | 8 mm | 3 – 24 |
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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