A method of forming, by means of plastic deformation, a frontal toothing on an inner ring of a wheel hub, comprising the steps of: - forming the inner ring of the wheel hub as the joining of a spindle and an insert ring fitted onto the spindle, on the side of a first end of the spindle; - axially blocking the ring onto the spindle by plastically deforming the first end of the spindle so as to form an upset collar therewith, which axially protrudes from the ring; and - frontally impressing the frontal toothing onto the collar, on the side opposite to the ring; wherein: i) - the step of impressing the frontal toothing onto the collar is carried out only after the step of forming the upset collar, sequentially after the end of the step of forming the collar, directly on the finished upset collar; ii) - the step of impressing the frontal toothing is carried out by means of a single, creator tool provided, towards the collar, with a toothing which is complementary to that to be obtained, consisting of a plurality of teeth radially arranged according to a circular crown, symmetrically with respect to a first axis defining the axis of symmetry of the tool; iii) - the teeth of the creator tool are shaped so as to be delimited at the top by respective ridges characterized in that said ridges are shaped with a rounded profile having a curvature radius varying in radial direction with respect to the first axis. - forming the inner ring of the wheel hub as the joining of a spindle and an insert ring fitted onto the spindle, on the side of a first end of the spindle; - axially blocking the ring onto the spindle by plastically deforming the first end of the spindle so as to form an upset collar therewith, which axially protrudes from the ring; and - frontally impressing the frontal toothing onto the collar, on the side opposite to the ring; wherein: i) - the step of impressing the frontal toothing onto the collar is carried out only after the step of forming the upset collar, sequentially after the end of the step of forming the collar, directly on the finished upset collar; ii) - the step of impressing the frontal toothing is carried out by means of a single, creator tool provided, towards the collar, with a toothing which is complementary to that to be obtained, consisting of a plurality of teeth radially arranged according to a circular crown, symmetrically with respect to a first axis defining the axis of symmetry of the tool; iii) - the teeth of the creator tool are shaped so as to be delimited at the top by respective ridges characterized in that said ridges are shaped with a rounded profile having a curvature radius varying in radial direction with respect to the first axis. i) - the step of impressing the frontal toothing onto the collar is carried out only after the step of forming the upset collar, sequentially after the end of the step of forming the collar, directly on the finished upset collar; ii) - the step of impressing the frontal toothing is carried out by means of a single, creator tool provided, towards the collar, with a toothing which is complementary to that to be obtained, consisting of a plurality of teeth radially arranged according to a circular crown, symmetrically with respect to a first axis defining the axis of symmetry of the tool; iii) - the teeth of the creator tool are shaped so as to be delimited at the top by respective ridges characterized in that said ridges are shaped with a rounded profile having a curvature radius varying in radial direction with respect to the first axis.