A bearing unit having at least one row of rolling bodies; and at least one cage for retaining a respective one of the at least one row of rolling bodies. The at least one cage comprising at least one base bar, a plurality of arms circumferentially spaced apart and extending from one side of the base bar, and a plurality of partially spherical cavities for retaining the respective one of the at least one row of rolling bodies. The respective row of rolling bodies and the at least one cage are in contact with each other along contact points positioned near a polar region of the respective one of the at least one row of rolling bodies, so that an angular distance (α) of the contact points with respect to an equator of the respective one of the at least one row of rolling bodies is between 40° and 75°.