滚动轴承代号按国家标准(GB272—64)的规定,由汉语拼音字母及数字组成。轴承代号分前、中、后三段。前段表示游隙系列(用数字表示)和精度等级(用字母表示);中段表示轴承型号(用七位数字表示);后段表示轴承的结构改变和特殊技术要求(用 Rolling bearing code by the national standard (GB272-64), by the Chinese pinyin letters and numbers. Bearing code points before, during and after the three sections. The front section shows the clearance series (indicated by numbers) and the accuracy level (indicated by letters); the middle section indicates the bearing model (indicated by seven digits); the rear section shows the structural changes of the bearings and special technical requirements