... Needle roller bearing feature, please check IXIN's pdf catalog for details.1. Bearing Material:GCr15,100Cr6,521002. Cage(Retainer): ... grade is based on GB/T307 (ISO 492, DIN 620) Materials:Material for needle roller is GCr15 (100Cr6) bearing steel, quench ... GCr15 (100Cr6) bearing steel, quench-hardness HRC60---65. Material for thrust washer is GCr15 (100Cr6) bearing steel, quench-hardness HRC61 ...