CPC F16C 33/62 (2013.01) [F16C 33/58 (2013.01); F16C 33/64 (2013.01); F16C 19/06 (2013.01); F16C 2204/62 (2013.01); F16C 2204/64 (2013.01); F16C 2223/18 (2013.01)] | 17 Claims |
1. A bearing unit comprising:
a radially outer ring comprising a radially outer raceway;
a radially inner ring comprising a radially inner raceway;
a row of rolling elements interposed between the radially outer ring and the radially inner ring;
an outer induction hardened central portion defined within the radially outer raceway; and
an inner induction hardened central portion defined within the radially inner raceway,
wherein both the radially outer ring and the radially inner ring are made of a carbon steel with a minimum percentage by weight of carbon equal to 0.42%;
wherein the outer induction hardened central portion comprises a hardness of between 55 HRC and 62 HRC over a depth SEmin of between 10% and 20% of a diameter (SΦ) of the rolling elements.
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