Duplex angular contact bearings are a matched set of angular contact bearings mounted in pairs. Depending on the duplex type, they can handle combined radial and axial loads in either one or two directions. The inner and outer ring raceways are offset to each other, resulting in a shoulder on the inner raceway rings.

Duplex angular contact bearings are a set of two bearings on a shaft with the inner and outer rings clamped together with preload to attain greater axial and radial rigidity. Duplex bearings also used to achieve additional capacity when insufficient space radially for larger bearings. Duplex bearings are machined as matched sets.