Swivelling bearing for roadheaders

A roadheader is a specialized piece of mechanical equipment used for mining tunnels, engineering passages, and urban underground projects. It consists of a travel mechanism, a working mechanism with a cutting head, a delivery system, and a transmission unit. As the machine advances, the cutting head continuously breaks through rock, while the delivery system transports the debris away.

Roadheaders typically use one or two slewing bearings—either single-row ball or three-row roller types—designed to handle large axial and radial forces, overturning moments, and impact loads. One bearing is mounted at the base to support the upper working mechanism, connect the base to the tunneling mechanism, and enable steering and rotation of the cutting head. Bearing reliability is crucial for precise control and stable performance in demanding underground conditions.