Enclosures and housings
Screenless Fitness Tracker Base Tray Capsule
- Bounding box
- 46.0 × 36.0 × 4.5 mm
- Engine
- Precision B-rep
- Parameters
- 12
- Published
- October 13, 2026
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The prompt
Create a parametric 3D CAD model of a rectangular, screenless fitness tracker base tray capsule. Outer bounding dimensions: Length 46.0mm, Width 36.0mm, Height 4.5mm. Apply a smooth 3.0mm fillet radius to all bottom outer corners and perimeter edges for ergonomic wrist comfort. Hollow out the entire internal chamber from the top face downward, creating uniform 2.0mm thick outer side walls and a 2.0mm thick bottom floor. Cut two vertical rectangular slots measuring 3.0mm x 23.0mm completely through the far left and right ends of the capsule wings to act as integrated 22mm watch strap slots. On the internal bottom floor surface, puncture two separate rectangular through-windows: a left window slot measuring 14.5mm x 14.5mm, and a right window slot measuring 13.0mm x 13.0mm. On the exact center of the short front-facing wall, carve a rectangular clearance channel measuring 12.0mm wide and 2.5mm high, flush against the inner floor plane to serve as a USB-C charging wire port. Export the final watertight solid manifold model as a parametric STEP file.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Length (X) | 46 mm | 25 – 90 |
| Overall Width (Y) | 36 mm | 20 – 70 |
| Overall Height (Z) | 4.5 mm | 3 – 15 |
| Bottom / Perimeter Fillet Radius | 3 mm | 0.5 – 6 |
| Side Wall Thickness | 2 mm | 0.8 – 6 |
| Floor Thickness | 2 mm | 0.8 – 6 |
| Strap Slot Depth (X) | 3 mm | 1 – 8 |
| Strap Slot Length (Y) | 23 mm | 8 – 34 |
| Left Floor Window | 14.5 mm | 3 – 24 |
| Right Floor Window | 13 mm | 3 – 24 |
| Charging Channel Width | 12 mm | 4 – 30 |
| Charging Channel Height | 2.5 mm | 1 – 6 |
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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