A head drum assembly is provided with a pair of oilless bearings installed within a bore of a stationary drum. Each of the oilless bearings is of a general donut-shaped configuration. A cross section thereof is provided with an external circular shape portion, an upper and a lower bearing surfaces. The upper and the lower bearing surfaces define an inner bore of the oilless bearing into which a rotating shaft are received, and slantly extend from the pair of planar portions, respectively, meeting at an apex in equal angles.
