A medical pendant assembly has an anchor plate that is attachable to a roof structure and a first rotation shaft that includes a shaft outer ring, a shaft inner ring, and a ball spacer sleeve. The ball spacer sleeve is disposed between the shaft outer ring and the shaft inner ring. A lower portion of the shaft outer ring includes a first flange. An upper portion of the shaft outer ring includes a second flange. The second flange of the first rotation shaft is either attached directly to the anchor plate or attached to the anchor plate via an extension assembly. A first arm is attached to the first flange of the first rotation shaft.

A support arm having a proximate support arm segment, a distal support arm segment, a hinge system; and at least one rotation limit stop secured to the hinge system to limit the extent of angular motion of the proximate support arm segment, the distal support arm segment or both, with respect to the hinge system. The rotation limit stop includes a first stop component and a second stop component slidable with respect to the first stop component. When the second stop component encounters a contact point on one of the support arm segments, the angular motion of the arm segment with respect to the hinge system is at a maximum. The second stop component can be secured in a plurality of positions with respect to the first stop component by an adjustment component.

A medical pendant assembly is disclosed. The medical pendant assembly has an anchor plate that is attachable to a roof structure and a first rotation shaft that includes a shaft outer ring, a shaft inner ring, and a ball spacer sleeve. The ball spacer sleeve is disposed between the shaft outer ring and the shaft inner ring. A lower portion of the shaft outer ring includes a first flange. An upper portion of the shaft outer ring includes a second flange. The second flange of the first rotation shaft is either attached directly to the anchor plate or attached to the anchor plate via an extension assembly. A first arm is attached to the first flange of the first rotation shaft.