Method for producing an inner ring for a tapered roller bearing, and tapered roller bearing having an inner ring

A method for producing an inner ring for a tapered roller bearing in which the inner ring comprises a raceway portion and a fixed edge portion, comprising the following steps:

• providing a flat circular blank parted from a metal strip;
• removing a center part from the flat circular blank to form an annulus;
• forming the annulus into an inner ring blank by extrusion in a preliminary forming step, in which the inner ring blank comprises a continuous conical surface that includes a conical unfinished raceway portion and a conical unfinished fixed edge portion, in which the conical unfinished fixed edge portion has a larger outside diameter than the conical unfinished raceway portion, and in which the inner ring blank has a through-opening;
• and
• forming the inner ring blank into the inner ring by extrusion in a main forming step, the conical unfinished fixed edge portion being formed into the fixed edge portion and the conical unfinished raceway portion being formed into the raceway portion;
• wherein a final contour of the inner ring is formed without any cutting.