Brackets and mounts
Modular Tendon-Driven Prosthetic Hand (Exploded)
- Bounding box
- 1192.8 × 117.9 × 70 mm
- Engine
- 3D Printing B-rep
- Parameters
- 39
- Published
- November 8, 2026
Download
Free to download and use. See the terms.
The prompt
Design a modular, hollow, tendon-driven prosthetic hand palm and finger assembly. The palm housing must have exactly three main structural components: 1. Left outer palm shell. 2. Right outer palm shell. 3. One internal partition wall separating the electronics compartment from the mechanical compartment. Internal compartments: Electronics compartment: - Space for an Arduino Uno. - Space for a small solderless breadboard. - Wiring clearance and mounting points. Mechanical compartment: - Space for five micro servo motors, entirely inside the palm. - Mounting points for each servo. - Space for tendon winding mechanisms or cable attachment points. Tendon-driven finger mechanism: - Five independently assembled fingers. - Each finger has three phalange segments and movable joints. - Internal tendon routing channels from the palm through each finger. - Separate tendon attachment points for each finger. - Elastic return bands or elastic cords to reopen the fingers when tendon tension is released. - Dedicated attachment points for elastic return elements. - Keep tendon paths and elastic return paths separate where possible. - Provide smooth cable passages and avoid sharp edges. - Ensure the thumb has an angled mounting position. Structural requirements: - The internal partition must remain within the palm and must not extend into the fingers. - The fingers must be detachable from the palm. - The tendon channels must connect the motor compartment to the finger joints. - Provide access for maintenance and replacement of strings, elastic bands, and servos. - Use millimeters. - Keep all components separate and parametrically editable. - Do not assume the dimensions of the Arduino, breadboard, or servos. - Request exact component dimensions before finalizing the internal cavities. - Generate an exploded assembly view and a separate internal mechanism view. - Design for further mechanical validation and 3D printing.
Parameters
| Name | Value | Range |
|---|---|---|
| Gap between exploded parts | 20 mm | 5 – 80 |
| Palm width, X | 95 mm | 60 – 200 |
| Palm depth, Y | 35 mm | 20 – 80 |
| Palm height, Z | 70 mm | 40 – 150 |
| Shell wall thickness | 2.5 mm | 1.2 – 6 |
| Outer edge chamfer | 3 mm | 0 – 10 |
| Partition width | 90 mm | 40 – 180 |
| Partition height | 65 mm | 30 – 150 |
| Partition thickness | 3 mm | 2 – 8 |
| Micro servo length | 23 mm | 10 – 60 |
| Micro servo width | 12.2 mm | 6 – 40 |
| Micro servo height | 22.5 mm | 8 – 60 |
| Number of servos | 5 mm | 1 – 5 |
| Arduino Uno length | 68.6 mm | 40 – 120 |
| Arduino Uno width | 53.4 mm | 30 – 120 |
| Arduino Uno height w/ headers | 15 mm | 5 – 40 |
| Breadboard length | 55 mm | 20 – 120 |
| Breadboard width | 35 mm | 15 – 80 |
| Breadboard height | 10 mm | 5 – 30 |
| Finger width | 14 mm | 8 – 30 |
| Finger thickness | 12 mm | 8 – 30 |
| Knuckle pin diameter | 6 mm | 3 – 12 |
| Tendon channel diameter | 2.2 mm | 1.2 – 4 |
| Elastic channel diameter | 1.6 mm | 1.2 – 4 |
| Index phalanx 1 | 18 mm | 8 – 40 |
| Index phalanx 2 | 14 mm | 8 – 40 |
| Index phalanx 3 | 12 mm | 8 – 40 |
| Middle phalanx 1 | 20 mm | 8 – 40 |
| Middle phalanx 2 | 15 mm | 8 – 40 |
| Middle phalanx 3 | 13 mm | 8 – 40 |
| Ring phalanx 1 | 19 mm | 8 – 40 |
| Ring phalanx 2 | 14 mm | 8 – 40 |
| Ring phalanx 3 | 12 mm | 8 – 40 |
| Little phalanx 1 | 16 mm | 8 – 40 |
| Little phalanx 2 | 12 mm | 8 – 40 |
| Little phalanx 3 | 10 mm | 8 – 40 |
| Thumb phalanx 1 | 22 mm | 8 – 40 |
| Thumb phalanx 2 | 17 mm | 8 – 40 |
| Thumb phalanx 3 | 14 mm | 8 – 40 |
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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