Impulse ring and a sensor-bearing unit comprising such impulse ring

A sensor-bearing unit comprising:

• a bearing including a rotatable inner ring and a stationary outer ring centered on a central axis, and
• an impulse ring having a magnetized target that generates magnetic fields adapted to be sensed by detection means, and an annular target holder having an inner fixing portion adapted to be fixed to a rotatable inner ring of bearing, an outer axial tubular portion centered on the central axis and holding the magnetized target is positioned radially beyond an outer ring of bearing, and an intermediate portion that substantially radially extends between the inner fixing portion and outer axial tubular portion, wherein the intermediate portion includes:
• a radial part outwardly extending from the inner fixing portion along a radial surface (P52) that forms substantially a right angle with the central axis,
• an inclined part outwardly extending between the radial part and outer axial tubular portion along a frustoconical surface (P54) that is inclined with respect to the radial surface and is directed towards the outer ring of bearing, and
• a plurality of circumferentially spaced stiffening ribs, the ribs axially protruding and radially elongating from the radial part towards the inclined part, and
• the inner axial portion of the target holder of the impulse ring is secured in an inner bore of the inner ring, the outer axial portion of the target holder is positioned radially beyond an outer cylindrical surface of the outer ring, and the radial part of the intermediate portion of the target holder is axially offset with respect to the inner ring of bearing, wherein
• the inner fixing portion is an axial tubular portion centered on the central axis, the radial part outwardly and perpendicularly extending from the inner axial tubular portion.