Statistics show that the transradial level is the most common level of upper-limb amputation seen by the prosthetist. Amputee needs an intermediate part to wear and fit the prosthetic device with the residual limb firmly. The socket is the only channel between residual limb and prosthetic components and is the crucial part of the prosthesis influencing
the amputee's acceptance considerably. The purpose of this design is making a test rig that can assess the socket while simulating arm movements that are common during activities of daily living such as:(Abduction, Adduction, Flexion, Extension, Supination and Pronation) in Euler angles: Yaw, Pitch and Roll. This test rig allows to predict when dislocation between the residual limb and the socket will be happened with any weight and at any plane.