... selling all kinds of linear motion bearing with the best prices and good quality. Needle Roller Bearing Materials: GCr15 Vibration Level: V1, V2 ... , V3 Typical applications: Electric motors, OEM1)Drawn cup needle roller bearing: HK, BK, HK RS, HK 2RS, BK RS, F, FH ... , MFH, FY, MFY, HF, HFLWe are professional manufactuer .1. Model: LZ series, HK SERIES, BK SERIES, HK-RS SERIES, BK-RS ...