Double direction angular contact thrust ball bearings have a contact angle of 60˚ and are axially preloaded. They are particularly well suited for running at high speeds. The contact angle and the axial preload ensures good ball control, especially under the centrifugal forces with fast rotating spindles.double direction angular contact thrust ball bearings are designed to locate spindle shafts axially in both directions. This bearing combination simplifies machining of the housing bore.

Double direction angular contact thrust ball bearings are manufactured with the same nominal bore size and outside diameter as corresponding cylindrical roller bearings. However, the outside diameter tolerance of the housing washers, combined with the housing bore diameter and NSK 20tac47bsuc10pn7b Bearing geometric tolerances recommended for super-precision cylindrical roller bearings under light to normal load and rotating inner ring load will result in an appropriate radial clearance in the housing bore. This clearance is sufficient to prevent radial loads from acting on the thrust bearing provided that its outer ring is not axially clamped in the housing.