Heavy duty Needle Bearing 1. HK,BK,HF,HFL series 2. high speed,low noise 3.OEM accepted. 4. Prompt delivery needle ... bearing Needle roller bearings have a high load carrying capacity in addition to their low cross-section ... assemblies : K , K-ZW ,K-K ,K-ZWD series3) Heavy duty needle roller bearings : NK , NKS , RNA49,RNA69,RNA48,NKI,NKIS ...