Abstract: A feed roll spike for mounting to a surface, i.e. the outer surface of a feed roller of a harvester head or a debarking machine. The feed roll spike comprises a substantially truncated cone shape base having a top side, a bottom side and an axis; and evenly-spaced identical projections extending upwardly from the top side of the base. The space between the projections defines channels.

Abstract: The present document describes a removable brake for a debarker arm having a working end with a debarking tool configured to remove bark from a log, the removable brake comprising a main body; a mounting surface for removably mounting the main body on the debarker arm; a leading edge on one end of the main body for causing the debarker arm to move from an inner position toward an outer position when the leading edge of the main body engages an end face of the log moving along a processing line toward the leading edge; and a brake portion on another end of the main body for increasing the resistance offered against the debarker arm while debarking the log.