GB/T 291-1964 in English

《GB/T 291-1964螺旋滚子轴承 结构型式和基本尺寸》由TC98（全国滚动轴承标准化技术委员会）归口，主管部门为中国机械工业联合会

Scope

This standard applies to light and medium series of spiral roller bearings. Bearings specified in this standard are used to withstand severe impact radial loads. This standard stipulates three types of bearing structure: Type 5000 - spiral roller bearing (Figure 1); Type 35000 - spiral roller bearing without inner ring (Figure 2); Type 65000 - spiral roller bearing without ring (Figure 2); image 3).