Multi-row bearing and bearing unit

A multi-row bearing comprising:

• an inner ring having multiple rows of inner ring raceway grooves;
• an outer ring having multiple rows of outer ring raceway grooves;
• and
• a plurality of balls disposed between the multiple rows of inner ring raceway grooves and the multiple rows of outer ring raceway grooves,
• wherein the multiple rows of inner raceway grooves comprise an inner ring raceway groove at one end portion in an axial direction formed over groove shoulders on both sides in the axial direction with respect to a respective groove bottom, and an inner ring raceway groove at an intermediate portion in the axial direction formed over a groove shoulder on one side in the axial direction from a respective groove bottom,
• wherein the multiple rows of outer raceway groove comprise an outer ring raceway groove at another end portion in the axial direction formed over groove shoulders on both sides in the axial direction with respect to a respective groove bottom, and an outer ring raceway groove at the intermediate portion in the axial direction formed over a groove shoulder on one side in the axial direction from a respective groove bottom,
• wherein the outer ring raceway groove at the intermediate portion in the axial direction has a cylindrical surface on a side opposite to the groove shoulder with respect to the respective groove bottom, and
• wherein the inner ring raceway groove at the intermediate portion in the axial direction has a cylindrical surface on a side opposite to the groove shoulder with respect to-the respective groove bottom.