An exciter apparatus for a vibrating machine, such as a screen machine or a feeder, comprising: an exciter body comprising a first bearing seat, said exciter body being configured for accommodating a lubricant and having a lubrication zone in a lower portion of the exciter body; a first bearing comprising an inner bearing portion and an outer bearing portion separated by a number of rollers located in a gap between the inner bearing portion and outer bearing portion, the outer bearing portion being attached to the first bearing seat such that the inner bearing portion is configured to rotate relative to the exciter body; a first shaft attached to the inner bearing portion, the first shaft comprising eccentric masses (18a, 18b, 18c, 18d) causing the exciter apparatus to vibrate upon rotation thereof; wherein the first bearing seat and the outer bearing portion comprising a through hole allowing a fluid to flow through the first bearing seat and the outer bearing portion into the gap, and wherein the exciter apparatus further comprising a lubricant provision means configured to provide a lubricant from the lubrication zone to the through hole; wherein the exciter apparatus further comprising a lubricant reservoir having an open upper end adapted to receive a lubricant, the lubricant reservoir being located adjacent the through hole and being located in the exciter body such that a lubricant located in the lubricant reservoir is provided to the gap by means of gravity; characterized in that the exciter apparatus further comprising a gutter arrangement provided on an inner end surface of the exciter body and configured to divert collected lubricant towards the through hole and the lubricant reservoir. an exciter body comprising a first bearing seat, said exciter body being configured for accommodating a lubricant and having a lubrication zone in a lower portion of the exciter body; a first bearing comprising an inner bearing portion and an outer bearing portion separated by a number of rollers located in a gap between the inner bearing portion and outer bearing portion, the outer bearing portion being attached to the first bearing seat such that the inner bearing portion is configured to rotate relative to the exciter body; a first shaft attached to the inner bearing portion, the first shaft comprising eccentric masses (18a, 18b, 18c, 18d) causing the exciter apparatus to vibrate upon rotation thereof; wherein the first bearing seat and the outer bearing portion comprising a through hole allowing a fluid to flow through the first bearing seat and the outer bearing portion into the gap, and wherein the exciter apparatus further comprising a lubricant provision means configured to provide a lubricant from the lubrication zone to the through hole; wherein the exciter apparatus further comprising a lubricant reservoir having an open upper end adapted to receive a lubricant, the lubricant reservoir being located adjacent the through hole and being located in the exciter body such that a lubricant located in the lubricant reservoir is provided to the gap by means of gravity; characterized in that the exciter apparatus further comprising a gutter arrangement provided on an inner end surface of the exciter body and configured to divert collected lubricant towards the through hole and the lubricant reservoir.