Multi-Row roller bearings NTN can be full complement, with machined cage or, more often, they mount a special kind of cage, the so called pin-type cage that allows the maximum filling of roller with the minimum friction possible.This makes Multi-Row roller bearings NTN suitable for demanding applications, such as backup and work rolls in rolling mills. The separable feature simplify the maintenance and allow the interchangeability, making possible the mounting of different inner rings with the same assembly.