bionic prosthetic hand 3d model

Engineering CAD design of a **modular tendon-driven bionic prosthetic hand (hand section only)** designed for **functional prototyping and 3D printing**. The model must include a **fully articulated mechanical hand with five fingers**. Each finger must consist of **three phalanges (proximal, middle, distal)** connected with **hinge joints and pin holes (3 mm)** to allow mechanical rotation. Inside each finger there must be **internal cable channels for fishing line tendons** which enable finger flexion when pulled. The tendon routing must be **smooth and optimized to reduce friction**, with rounded internal cable guides or pulley-like surfaces to prevent the fishing line from rubbing during movement. The palm must be designed as a **hollow mechanical housing** containing: * servo motor mounts * tendon routing channels * controller mounting platform (Arduino or similar microcontroller) * internal wiring channels * battery compartment The wrist section must include a **structural mounting holder / socket a