Skf France

Skf Engineering and Research Centre B.v.

Michel Christian Gorenne

John M Beswick

Yannick Fierling

Carole Girardin

Antonin Ballay

Method for the production of a part of a rolling bearing, such as a ring for a ball bearing. The starting material used is a grade of steel containing 0.90 1.00% C; at most 0.15% Si; 0.25-0.45% Mn; at most 0.0015% P; at most 0.010% S; 1.30-1.50% Cr; at most 0.15% Ni; 0.20-0.23% Mo; at most 0.20-0.23% Cu; at most 20 ppm Ti; at most 8 ppm O. Before subjecting this grade of steel to a quenching and tempering treatment, the shaped item is subjected to plastic deformation in the hot or cold state. The mechanical properties and in particular the anticipated life under severe stress improve as a result.

Method for the production of a part of a rolling bearing

An anti-friction bearing device comprising an outer ring ( ) provided with an outer surface and a bore on which a toroidal bearing inner race ( ) is formed, an inner ring( ) which is provided with a bore and a cylindrical outer surface on which a toroidal bearing outer race ( ) is formed, a row of balls ( ) which are disposed between the two bearing races, and a cage which can maintain a regular circumferential spacing between the balls. The ratio between the radial thickness of the outer ring, when taken between the bottom of the bearing inner race and the outer surface of the outer ring and the diameter of the balls ranges from 0.4 to 0.7. The ratio between the radial thickness of the outer ring, when taken between the bottom of the bearing inner race and the radial thickness of the inner ring when taken between the bottom of the outer bearing race and the bore of the inner ring ranges from 1.1 to 1.6.

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Tours, France

Michel Christian Gorenne