Wheel bearing

A wheel bearing, comprising:

• an outer ring coupled to a vehicle body;
• a wheel hub to which a wheel is coupled, in which an orbital forming portion is formed at an end portion thereof in an inner axial direction, and in which face splines are formed at an inner axial end portion of the orbital forming portion;
• an inner ring which is coupled to an outer peripheral surface of the wheel hub by the orbital forming portion to rotate relative to the outer ring, and which comprises a first cylindrical portion comprising a first outer peripheral surface and a first end surface formed in the inner axial direction and a second cylindrical portion having a diameter smaller than that of the first cylindrical portion, comprising a second outer peripheral surface and a second end surface formed in the inner axial direction, and extending from the first end surface in the inner axial direction;
• a first seal member disposed between the outer ring and the first outer peripheral surface of the first cylindrical portion and configured to seal between the outer ring and the inner ring;
• and
• a second seal member press-fitted to the second cylindrical portion,
• wherein the second seal member comprises:
• a slinger comprising an outer axial end portion spaced apart from the first seal member and the first end surface;
• a first seal lip coupled to the outer axial end portion of the slinger and comprising a first seal portion in contact with a portion of the first seal member and a second seal portion in contact with a portion of the first cylindrical portion;
• a second seal lip coupled to the slinger so as to be spaced apart from the first seal lip in the inner axial direction,
• wherein the first seal member comprises an inner peripheral surface disposed on a first outer peripheral surface of the first cylindrical portion, an end surface formed in the inner axial direction, and a corner surface disposed between the inner peripheral surface of the first seal member and the end surface of the first seal member;
• wherein the first seal portion is in contact with the inner peripheral surface of the first seal member or the corner surface disposed between the inner peripheral surface of the first seal member and the end surface of the first seal member;
• and
• wherein the second seal portion is in contact with the first outer peripheral surface of the inner ring or a corner surface disposed between the first outer peripheral surface and the first end surface of the inner ring.