Robot articulation device

The robot articulation device includes a first arm pivoted on a support stand for rotation about a first axis and a second arm is pivotally mounted on the free end of the first arm for rotational movement about a second axis. The first and second axes may be vertically or horizontally disposed. Opposed recessed are located in the first and second arms concentric with the second axis and a sleeve secured to one of the arms extends into the recess in the other arm. A projection is secured to the other arm and extends into the sleeve and bearings are disposed between the projection and the sleeve and the sleeve and the recess, respectively. A gear reduction unit is located in the other recess and is provided with an input shaft which may be driven from a drive motor mounted on the support stand.