Ball Bearings for Heavy Work.
Page 19
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The ball bearing which we illustrate :)y two views on this page is the " F. end S.," for which The " Tormo " Manufacturing Company (H. and D. Friedenhain), of 67 and 68, Bunhill Row, London, E.C., are the sole agents for the United Kingdom and the Colonies. Messrs. Fichte] and Sachs, who make these bearings at their factory at Schweinfurt, have laid down extensive and specially-designed niachinery for rapidly and accurately producing the bearings in large numbers. Over t,soo men are employed in the various departments of the factory.
One of our illustrations is of all the component parts of the bearing, in order to show more clearly the construction. The cage (A) is in two pieces ; each piece is identical and is stamped out of sheet steel. The two parts are held together by the small, steel screws (B) after the balls have been placed in position within the ball-races (D, E). This form of cage permits of the fitting of more than the usual number of balls to a bearing of a given diameter. In order to get such a large number of balls in position, the races (I) and E) have diagonal grooves ground in where marked (X). These grooves are not continued any further than has been found absolutely necessary to permit the balls to enter; were the grooves continued to the centres of the races, their presence would be damaging to the balls, and would result in noise and, frictional losses. The steel from which the races are made is specially prepared for the purpose and gives very good results when subjected to hard work on heavy, commercial-motor vehicles. Ball-thrust bearings in a variety of sizes, and in designs suitable for the varying requirements of differentialgears, steering-gears and other parts, are also made by the same company, and receive the same care and attention in their manufacture. The " F. and S." bearings have been extensively used on motorbuses, and, amongst other makes, have given satisfactory results on Milnes-Daimler vehicles.