Gears and transmission
3D-Printable Prosthetic Finger
- Bounding box
- 548 × 25 × 26 mm
- Engine
- 3D Printing B-rep
- Parameters
- 34
- Published
- November 2, 2026
Download
Free to download and use. See the terms.
The prompt
Design a fully 3D-printable mechanical prosthetic finger for a school engineering project. Include three articulated segments, movable joints, a string-and-pulley mechanism that bends the finger, and elastic bands that return it to its open position. Make each part printable on a Creality 3D printer. Export as separate STL files.
Parameters
| Name | Value | Range |
|---|---|---|
| Gap between laid-out parts | 6 mm | 2 – 40 |
| Mount length X | 40 mm | 25 – 70 |
| Mount width Y | 25 mm | 15 – 50 |
| Mount height Z | 12 mm | 8 – 25 |
| Pulley pocket clearance | 0.3 mm | 0.1 – 1 |
| Proximal length | 45 mm | 25 – 80 |
| Proximal width | 18 mm | 10 – 35 |
| Proximal height | 12 mm | 6 – 25 |
| Middle length | 35 mm | 20 – 70 |
| Middle width | 16 mm | 9 – 32 |
| Middle height | 11 mm | 6 – 22 |
| Distal length | 30 mm | 18 – 60 |
| Distal width | 14 mm | 8 – 28 |
| Distal height | 10 mm | 5 – 20 |
| Hinge pin diameter | 3 mm | 2 – 5 |
| Hinge pin shaft length | 24 mm | 12 – 40 |
| Pin head diameter | 6 mm | 4 – 12 |
| Pin head thickness | 2 mm | 1 – 4 |
| Knuckle width | 8 mm | 5 – 16 |
| Sliding fit clearance | 0.3 mm | 0.15 – 0.6 |
| Pulley diameter | 18 mm | 10 – 30 |
| Pulley thickness | 6 mm | 3 – 12 |
| Pulley bore diameter | 3.3 mm | 2 – 6 |
| String groove depth | 2 mm | 1 – 4 |
| Axle diameter | 3 mm | 2 – 5 |
| Axle shaft length | 20 mm | 10 – 40 |
| Tendon channel width | 2 mm | 1 – 4 |
| Tendon channel depth | 1.5 mm | 0.8 – 3 |
| Tendon cord diameter | 1 mm | 0.6 – 2 |
| Tendon cord length | 180 mm | 80 – 300 |
| Elastic cord diameter | 1.5 mm | 1 – 3 |
| Elastic cord length | 120 mm | 60 – 250 |
| Dorsal hook post diameter | 3 mm | 2 – 5 |
| Dorsal hook post height | 6 mm | 3 – 12 |
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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