... the ISO 618-2 standard, on both sides of a lip type sealIKO open punching needle roller bearings ( HK. RS ), according ... to the ISO 618-2 standard, unilateral lip type sealIKO closed type punching needle roller bearings ( BK ), according ... type punching needle roller bearings ( BK. RS ), side of the lip sealIKO needle roller bearing ( NK ), light seriesIKO needle roller bearing ...