Bearing assembly

A bearing assembly comprising:

• an outer ring in which a hollow is formed and which includes a protrusion protruding along an inner circumferential surface of the outer ring in a radial direction and a first ball contact portion and a second ball contact portion which are separated by the protrusion;
• an inner ring having an outer circumferential surface on which a third ball contact portion is formed and inserted into the hollow to form a first track portion between the first ball contact portion and the third ball contact portion and a second track portion between the second ball contact portion and the third ball contact portion;
• and
• a plurality of bearing balls which are disposed between the outer ring and the inner ring and rotatably connect the outer ring and the inner ring,
• wherein the bearing balls are disposed in the first track portion and the second track portion to form a double row bearing with the plurality of balls contacting the respective ball contact portions,
• wherein
• the first ball contact portion of the outer ring includes a first contact surface part and a second contact surface part;
• and
• the bearing balls are in point contact with the first contact surface part and the second contact surface part,
• wherein a diameter (D1) of the bearing ball is greater than a length (D2) of the first contact surface part in a width direction (W).