ALUMINUM BEARING ALLOYS AND THEIR DEVELOPMENT BY THE KARL SCHMIDT COMPANY AT NEKARSULM, GERMANY

摘要

This report is a history of the work done at Karl Schmidt G. m. b. H., Neckarsulm on aluminum base bearings. Large numbers of experiments with all kinds of additions of such metals as Bi, Cd, Pb to the aluminum base, have been conducted. Cast bearings, as well as bearings pressed from aluminum powder (with and without graphite additions as lubricant), plated bearings (on steel and on aluminum), bearings in different engines and different speeds were tried over a period of many years.nAlthough the report shows that Karl Schmidt put a great amount of effort and money into these experiments no final and conclusive results seem to have been achieved. The sensitivity of the bearing material, difficulties with lubrication, etc., prevented their use on a general and large production scale.nThe report indicates possibilities for a wide range of applications if and when the above-mentioned difficulties have been overcome;nIt might be mentioned that aluminum alloys are used at present for the connecting rod bearings of the T8 Ford (bearing type 411) and for the crankshaft bearings of the Volkswagen (type 83A).nThe peak production during the war amounted to 60,000 bearings per month.