Swivelling bearing for drilling rig

A rock drill (perforator) is a heavy-duty tool used to bore blast holes in rock formations, allowing explosives to break the rock for quarrying or construction purposes. It can also be adapted into a crusher for breaking through tough layers like concrete.

A critical component in the drilling machine is the slewing bearing, typically a single-row ball bearing with internal teeth or a crossed roller bearing with hardened teeth. This bearing supports the upper structure, cabin, and mechanical arms, and allows for smooth and controlled rotation. It must withstand axial and radial forces as well as overturning moments—key for maintaining stability and precision when drilling through dense material.