The wheel/rail interface of a railway is an important matter because of the cost involved in premature rail change outs. Typical problems encountered on railways include shelling, spalling, side wear, plastic flow, dipped welds, corrugation and fatigue. Rail grinding is considered the most effective maintenance practice to control the effects of rolling contact fatigue, to restore profile, and to maximize value from the rail asset.

So these machines are used for restoration of the profile and remove irregularities from worn rail track to extend its life and to improve the ride of trains using the track.