Why two way thrust angular contact ball bearing can't bear radial load?

By the two axis ring, a seat ring, a sleeve, surface profile measurement ,two sets of roller and cage assembly. The thickness of the grinding sleeve can adjust the preload of the bearing.

The nominal contact angle of the bearing is 60 degree, which can bear the large axial load, and the axial rigidity is high.

The nominal diameter of the contact ball bearing and the outside diameter of the double row cylindrical roller bearing are same, sealed angular contact ball bearing but the deviation is small, so the fit of the hole of the box is in a certain gap. Therefore, the two-way thrust angular contact ball bearing can not bear radial load.