USA Tolerance Rings Metric Tolerance Ring BN Series

BN rings feature corrugations that face outward. Materials: Stainless, Hastelloy, Monel Sizing: Inch or Metric BN style rings have a free-state diameter smaller than the shaft diameter over which they are to be installed, so that when mounted to the shaft the rings conform to and become self-retaining on the shaft. If used with the centered or halfcentered arrangement, the ring will snap into the groove and no further handling of the ring is necessary. If used with the free arrangement, the ring must be axially supported during assembly of the mating parts. The BN ring is cut to fit inside a nominal circumference. Examples for use of the BN ring include mounting a bearing inner race to a shaft, or assemblies in which modification of the shaft is more practical than modifying the bore of the outer member.