I am using it instead of a spacer, but I am saved because there is a necessary size. We also think that it is very convenient to use without necessity of processing because dimensional tolerance is also less and precise.
Shell type needle roller bearing Used as inner ring of HMK type bearing. I used this product as a spacer that matches the diameter with the M5 screw that uses the bearing, although it is different from the usual usage as the roller gauge roller gauge used for the bicycle swing base. Although there is some clearance between the bearing and the inner ring, it can be used satisfactorily without any trouble in the rotation operation.