Roller bearing, in particular for a vehicle steering system or for a vehicle wheel hub assembly

A roller bearing for a steering system or a vehicle wheel hub assembly comprising:

• at least one first ring;
• at least one first annular race formed in the first ring;
• at least one second ring;
• a second annular race formed in the second ring, wherein the second annular race is positioned facing the at least one first annular race;
• and
• a plurality of rolling bodies inserted between the first ring and the second ring that enable the rings to rotate relatively around an axis of rotation, wherein the rolling bodies collectively create at least one annular band of rolling bodies that engage with the at least one first annular race and the second annular race;
• wherein a surface comprising the first annular race includes:
• an annular bottom surface having a concave annular surface, the annular bottom surface delimited by a first end and a second end;
• a first section having a convex annular surface with a first radius of curvature, the first section delimited by a first end and a second end;
• a lateral surface delimited by a first end and a second end;
• a cylindrical section having a constant radial dimension from the axis of rotation, the cylindrical section delimited by a first end and a second end;
• a second section having a convex annular surface with a second radius of curvature, the second section delimited by a first end and a second end;
• a third section having a concave annular surface with a third radius of curvature, the third section delimited by a first end and a second end;
• the annular bottom surface arranged having the first end located proximate one end of the first ring and the second end located proximate a central section of the first annular race,
• the first section being located between the annular bottom surface and the lateral surface with the first end of the first section being continuous with the second end of the annular bottom surface,
• the lateral surface being located between the first section and the cylindrical section with the first end of the lateral surface being continuous with the second end of the first section,
• the cylindrical section having a constant diameter across the section, the cylindrical section being located between the lateral surface and the second section with the first end of the cylindrical section being continuous with the second end of the lateral surface,
• the second section being located between the cylindrical section and the second section with the first end of the second section being continuous with the second end of the cylindrical section,
• the third section arranged having the first end continuous with the second section and the second end located proximate a second end of the first ring, and
• a bend having a concave annular surface, the bend formed on each side of a junction between the first end of the third section and the second end of the second section,
• the diameter of the cylindrical section being greater than a smallest diameter of the annular bottom surface, wherein the cylindrical section provides an axial retention shoulder for the rolling bodies.