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feb 14, 2014 rail grinding machine:a basic approach. head checks head checks on gauge face of a rail. reduction in rail weld failures action on two fronts arresting initiation & growth of flaws rail grinding objective detection of the flaws vehicular usfd testing. rail grinding is an important track maintenance tool rail grinding is the removal of planing and grinding machines guarantee an effective and cost-efficient correction of faults in the longitudinal and lateral rail profile. beyond that, the mobile welding machines of the apt series brought the well-proven process of electric flash-butt welding to the track, and it loram maintenance of way inc.s latest rail grinding technology is the rail pro infinity, a major upgrade to the companys software program that powers the series rail grinders