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May 02 2012 (2:15PM)
A railgrinder (or rail grinder) is a maintenance of way vehicle or train used to restore the profile and remove irregularities from worn rail track to extend its life and to improve the ride of trains using the track.
Rail-grinding equipment may be mounted on a single self-propelled vehicle or on a dedicated rail grinding train which, when used on an extensive network, may include crew quarters. The grinding wheels, of which there may be more than one hundred, are set at controlled angles to restore the track to its correct profile.