SINKER ROLLER Assembly is utilized for wire guide in molten metal bath ( zinc, aluminum, or combinations thereof ) is for hot-dip coating of wire. Sinker Roller necessarily be provided for directing the wire into and out of the bath, as well as guiding and changing the direction of the wire during its travel in the bath. The outer perimeter surface around which the wire is wrapped is composed of alumina or other refractory segments housed within the sinker assembly. The outer surface of the discrete segments is grooved, so that the wire wrapped there around bears solely on the internal sides of the groove. In the coating of wire products, the sinker is of critical importance since any significant degree of lateral movement or vibration will be reflected in variations of the resultant hot-dip coating.