Heavy duty Needle Bearing 1. HK,BK,HF,HFL series 2. high speed,low noise 3.OEM accepted. 4. Prompt ... is limited .they are widely used in Motorcycles ,Mopeds , Automotive ,Power tool ,Texitile machine , Printing machinery ,Food packing machine,Toys etc , We ... ) Stud type track roller : KR , KRV ,NUKR series we can supply you standard series bearing , also we can make according to your ...