A baling chamber for an agricultural baler includes: a plurality of sidewalls defining a volume, one of the sidewalls having a roll opening formed therein; a plurality of belts disposed within the volume; a sledge assembly including at least one roll that is pivotable within the volume, the at least one roll having an exterior portion that extends out of the volume through the roll opening and a bearing disposed outside of the volume and associated with the exterior portion; and a drive assembly disposed outside of the volume, coupled to the exterior portion, and configured to rotate the at least one roll.