Self-centralising troughing sets
Sometimes the difficult working conditions of the plant results in a lateral movement of the belt. In this case a self-centralising troughing set is used which acts in a way that corrects the belt tracking and maintains it constantly in the central position.
The self-centralising troughing set is designed as a series of rollers arranged in a trough positioned onto the supporting transom which itself is fixed to a slewing ring which permits rotation.
The slewing ring (a large ball bearing) permits a rotation limited to 5-8 degrees and is sized in proportion to the vertical loading; a tapered roller bearing assembled to the shaft of the slewing ring, absorbs any side forces or overturning pressures.
The installation of the self-centralising troughing sets is advised to be positioned on the upper strand rather than the return section, and used only when the working conditions require.