Gould Inc.

Imperial Clevite Inc.

William A Yahraus

Rodney W Stutzman

Hans G Lanner

Kenneth A Bryda

An improved method of producing a powdered metal aluminum base bearing material is provided. A bearing strip composed of three layers of sintered aluminum base particles which has been roll clad to a rigid backing layer is subjected to a heat treatment procedure in a continuous manner at a temperature of from about 700.degree. F. to about 900.degree. F. for at least thirty seconds and then cooled at a rate of at least 100.degree. F./hr. Bearings made from the resulting material show dramatic fatigue life improvement in comparison to that obtainable with currently available powdered metal aluminum bearing materials.

Method of heat treating bearing materials

A sleeve bearing of the halfshell type wherein an oil film is disposed between the bearing and journaled member during operation and which bearing improves bearing fatigue resistance. The thickness of one of the halfshells is increased to thereby reduce the radius of curvature thereof and the thickness of the other halfshell is reduced by an equal amount to thereby increase the radius of curvature thereof. The halfshells are disposed so as to closely surround a journaled member in a manner such that the higher loads generated during bearing cycling are carried by the halfshell having the greater thickness. This structure acts to reduce destructive oil film pressures developed between the bearing and journaled member during that period of bearing cycling when elevated loads are experienced.

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Mentor, OH, United States of America

William A Yahraus