Taper hole with tapered ratio of 1:12 inner diameter inner ring Two-divided window type steel punching cage Bunctureless inner ring Inner ring guide type guide wheel Internal design optimized for increased load capacity Outer ring grooves and three oil holes Inner ring diameter (mm): 65 Outer ring diameter (mm): 120 宽度(mm):31 工作温度范围(℃):-40至+200 精度等级:ISO 492维度准确性宽度公差 运行精度P5等级