... with the best prices and good quality. Needle Roller Bearing Materials: GCr15 Vibration Level: V1, V2, V3 Typical applications: Electric motors ... .1. Model: LZ series, HK SERIES, BK SERIES, HK-RS SERIES, BK-RS SERIES, FFH SERIES, MFH SERIES, FY SERIES, MFY SERIES, HF SERIES, HFL SERIES etc 2. Materials: GCr15, GCr15SiMn, G20Cr2Ni4A ...