你好!直径12k7轴的公差为Ф12k7(+0.019/+0.001),上偏差为+0.019,下偏差为+0.001.最大极限尺寸为Φ12.019,最小极限尺寸为Φ12.001,公差带为0.018.仅代表个人观点,不喜勿喷,谢谢.