National Precision offers a variety of insert bearings that can be used in numerous applications. Bearing inserts are used to replace worn or damaged bearings in an existing bearing housing without needing to repurchase a new mounted housing. In some cases, the mounted unit does not need to be removed from mounted surface. Insert bearings are designed to be mounted on shafts without using lock nuts, adapters, or shoulders. The inner ring of the insert bearing frequently extends outside of both sides of the housing to provide extra support to the shaft.