The invention relates to a feeder device in a timber harvester, which includes a frame, a 3-row roller chain arranged to be rotated around a drive sprocket, a turnover member and roll guides, which roll guides extend for a great length of a gripping side of the feeder device, between the drive sprocket and the turnover member, and in which roller chain there are rows of links staggered relative to each other by transverse pins, comprising a middle row of links with smaller rollers and outer rows of links with larger rollers, each row of links corresponding to its own roll guide.
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