Angular ball bearing

An angular ball bearing, the angular ball bearing including an outer ring having an outer ring raceway surface on an inner circumferential surface of the outer ring, an inner ring having an inner ring raceway surface on an outer circumferential surface of the inner ring, a plurality of balls being rollable between the outer ring raceway surface and the inner ring raceway surface at a contact angle, and a cage holding the plurality of balls at predetermined intervals in a circumferential direction, wherein

• the outer ring further includes an outer ring extending portion extending in the axial direction from the outer ring raceway surface toward one side in the axial direction which is the side opposite to the side on which the line of action of the contact angle relative to the center of the ball passes through the outer ring raceway surface, an outer ring small-diameter portion extending toward another side in the axial direction relative to the outer ring raceway surface, a radial wall portion extending toward an inner diameter side from an axial end portion of the outer ring small-diameter portion, and a folded-back portion extending toward the one side in the axial direction from a radial inner end portion of the radial wall portion,
• the outer ring extending portion has an outer ring bent portion radially bent at least at two portions in a circumferential direction,
• the inner ring includes an inner ring extending portion extending in the axial direction from the inner ring raceway surface toward the side opposite to the side on which the line of action of the contact angle relative to the center of the ball passes through the inner ring raceway surface,
• the inner ring extending portion has an inner ring bent portion radially bent over an entire circumference,
• the folded-back portion has a radial gap between the folded-back portion and an inner circumferential surface of the inner ring extending portion, and overlaps the inner ring extending portion in the radial direction,
• the radial gap at an inner diameter side inlet defined by an outer circumferential surface of an axial end portion of the folded-back portion and the inner circumferential surface of the inner ring extending portion is smaller than the radial gap at an inner diameter side outlet defined by an inner circumferential surface of an axial end portion of the inner ring extending portion and an outer circumferential surface of the folded-back portion.