The cage of the needle rollers and cage assemblies is acting an important role for the bearings to operate at high speed, in addition to high load carrying capacity. There are neither inner rings nor outer rings, the cage holds the needle rollers, with its’ low cross section that provides the maximum load carrying capacity, and within the smallest radial space among all types of bearings. The cage is uniquely designed to precisely hold the needle rollers to possibly reduce stresses of bearing during operations, and allowing moderate shaft misalignment so that to extend the bearings life span.
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