The MØRCH UP-4 incorporates a special concept of the unipivot principle.
The bearing consist of a hardened steel pivot resting in a concave, polished
sapphire. The bearing is damped in all directions with silicone fluid. The
low positioning of the bearing provides for a greater stability compared to other
unipivot arms, since a considerable part of the moveable mass of the arm is positioned
above the pivot point.
With the model UP-4 the azimuth adjustment is made by the way of the counterweights.
