Application of Tapered Roller Bearings in Merchant-Bar Mills

Abstract

Abstract Tapered roller bearings have played an important part in the numerous developments in the art of rolling metals. Their use has made possible a considerable decrease in the consumption of power by the elimination of friction, a considerable decrease in the cost of the electrical equipment required, a decrease in the cost of lubrication and general maintenance, an increase in the speeds of operation and consequently the tonnage produced, and a marked increase in the accuracy of the product. In this paper the actual experience, over a period of five years, in the proper design, mounting, and operation of bearings in merchant-bar mills is discussed. Extracts are given from the results of a series of power tests made on the same mills alternately equipped with plain and tapered roller bearings. Various means of lubrication of rolling mills, pinion stands, and gear drives are cited. The design of suitable bearing closures is also taken up and shown in detail. The illustrations shown are of equipment in actual operation in various mills.