目前国内各轴承厂对向心球轴承成品轴承径向游隙的检查普遍采用P-123,P-124仪器,根据多年使用情况,各厂一致反映这两种仪器示值很不稳定,给径向游隙的检查带来很大困难,而且效率低,结构复杂,操作不方便,普遍要求迅速改变这种状况,以适应目前轴承生产的需要. At present, the domestic bearing factory to radial ball bearings bearing radial clearance inspection commonly used P-123, P-124 instruments, according to many years of use, the factory unanimously reflects the two instruments are very unstable indication to the diameter It is very difficult to check the clearance, and it is inefficient, complicated in structure and inconvenient in operation. It is generally required to quickly change this situation to meet the needs of current bearing production.