Enclosures and housings
Wrist Cord Spool
- Bounding box
- 35.0 × 19.0 × 35.0 mm
- Engine
- Precision B-rep
- Parameters
- 8
- Published
- August 7, 2026
Download
Free to download and use. See the terms.
The prompt
Create a dimensionally accurate, fully 3D-printable removable cord spool for a wearable Spider-Man-inspired wrist prop. CORD: - Cord length: 5 metres (5000 mm) - Cord diameter: 1.5 mm - Cord material: braided UHMWPE / Dyneema-type cord - The cord is for controlled, stationary bench-top testing and controlled retraction only. - Do not design the spool as a projectile launcher or as a device for pulling people. SPOOL: - Outer spool diameter: 35 mm - Spool width: 15 mm - Central axle hole: 5 mm diameter - Add two circular side flanges to keep the cord contained. - Add a smooth rounded cord-retaining channel around the spool. - Add a small cord-anchor hole or slot for securing the beginning of the cord. - Make all edges that contact the cord smooth and rounded. - Make the spool removable from the wrist enclosure. FIT: - Allow sufficient clearance between the spool and its housing for free rotation. - Design the spool to accommodate the entire 5 m × 1.5 mm cord. - Do not assume the 35 mm × 15 mm spool has sufficient capacity; calculate the required winding capacity and increase the spool width or diameter if necessary. - Keep the final spool compact enough for a wearable wrist enclosure. AXLE: - Include a 5 mm central axle interface. - Keep the spool aligned centrally during rotation. - Include suitable clearance between the rotating spool and stationary axle/housing. 3D PRINTING: - Make the spool suitable for FDM 3D printing. - Avoid unnecessary supports. - Use rounded edges and sufficiently thick walls. - Make the spool a single printable part. - Make all dimensions parametric and editable. - Provide dimensions in millimetres. - Exportable as STL and, if supported, editable STEP/parametric CAD. IMPORTANT: The cord and spool are not intended to support a person's body weight or to launch the cord. The 8 kg requirement applies only to a separate, stationary bench-top cord test, not to the wearable device or its trigger mechanism.
Parameters
| Name | Value | Range |
|---|---|---|
| Flange Outer Diameter | 35 mm | 30 – 50 |
| Spool Width (between flanges) | 15 mm | 10 – 25 |
| Drum Outer Diameter | 14 mm | 10 – 25 |
| Central Bore Diameter | 5 mm | 4 – 10 |
| Flange Thickness | 2 mm | 1 – 5 |
| Cord Anchor Hole Diameter | 2 mm | 1.5 – 3 |
| Fillet Radius (Drum-Flange Inner Corner) | 0.8 mm | 0.2 – 2 |
| Fillet Radius (Flange Outer Edge) | 0.5 mm | 0.1 – 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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