Double row full complement cylindrical roller bearings are designed for heavier radial load carrying capacity than a same sized cage series bearing. The increase in rollers lends to the increase in capacity with a decrease in speed rating. Available in  floating, single direction locating or two-direction locating, these bearings prove useful in high load, relative low speed applications such as bar straighteners, and gearbox output shafts. These bearings are supplied with C3 internal radial clearance unless specified.

Bearings without a cage incorporate a maximum number of rollers. Therefore, and because of their second row of rollers, Double row full complement cylindrical roller bearings are suitable for very heavy radial loads. The increased number of rollers increases radial stiffness.

Double row full complement cylindrical roller bearings incorporate a maximum number of rollers and are therefore NSK 6003ddu Bearing suitable for very heavy radial loads at moderate speeds. They are used to locate the shaft axially in one direction and eventually to accommodate axial displacement of the shaft relative to the housing in the opposite direction.