Double row ball bearing and its manufacturing method

摘要

Provided are a double row ball bearing capable of effectively dispersing a radial load while reducing a frictional force when the inner ring and the outer ring rotate relative to each other, and a method for manufacturing the same. A plurality of ball rows (5) are interposed between the inner ring (3) and the outer ring (4) so as to be adjacent to each other, and in each of the plurality of ball rows (5), the balls (5a) are spaced apart (L). It is arranged for each ball row (5) and is arranged so as to be displaced in the row direction of each ball row (5) with respect to the ball row (5) adjacent to each ball row (5). Two balls (5a) face the space (LS) of each predetermined interval (L) in the ball array (5) adjacent to each ball array (5) and form each predetermined interval (L). It is in contact with the ball (5a).