Enclosures and housings
Spiral Arm Coupling
- Bounding box
- 95.8 × 95.8 × 37.5 mm
- Engine
- Precision B-rep
- Parameters
- 15
- Published
- August 7, 2026
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The prompt
Overall height: 35 mm Four identical spiral arms, 90° apart Arm height: 10 mm Arm cross section: inner: 10 mm × 2.8 mm outer: 10 mm × 2.4 mm (linear taper) Central hub: diameter 12.5 mm central M6 threaded hole (or 5 mm pilot hole) Four vertical feet: rectangular section top 10 × 6 mm tapering towards the bottom lower circle diameter: 68 mm Outer diameter across locking feet: 73 mm Four locking tabs according to attached reference photos. Smooth fillets between hub, arms and feet. Mechanical part for PETG 3D printing. Preserve dimensions exactly. Generate watertight manifold solid. Export STEP and STL.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Height | 35 mm | 20 – 50 |
| Hub Diameter | 12.5 mm | 8 – 20 |
| Number of Arms | 4 | 2 – 8 |
| Arm Height (Z) | 10 mm | 5 – 20 |
| Arm Tangential Width | 10 mm | 5 – 20 |
| Arm Thickness at Hub | 2.8 mm | 1 – 5 |
| Arm Thickness at Outer | 2.4 mm | 1 – 5 |
| Outer Arm Radius | 34 mm | 20 – 50 |
| Foot Top Length (Radial) | 10 mm | 5 – 15 |
| Foot Top Width (Tangential) | 6 mm | 3 – 10 |
| Foot Bottom Circle Diameter | 5 mm | 3 – 10 |
| Locking Tab Width | 5 mm | 2 – 10 |
| Locking Tab Height | 3 mm | 2 – 6 |
| Tab Protrusion (Radial) | 2 mm | 1 – 4 |
| Fillet Radius (Hub / Arms / Feet) | 1.5 mm | 0.5 – 3 |
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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