轴承的游隙是指轴承在未安装于轴或轴承箱之前的状态下，固定内圈或外圈的一方，使未固定的套圈做径向或轴向移动时套圈的移动量。根据移动方向，可分为径向游隙和轴向游隙。
Bearing clearance means the value of displacement of the unfixed ring when it moves against the fixed ring in radial or axial direction before the bearing is mouted on a shaft or in a housing. According to the movement direction, it falls into radial clearance and axial clearance.
单列深沟球轴承的径向游隙 RADIAL CLEARANCE
轴承内径（d） mm |
C2 | CO | C3 | C4 | |||||
| 超过 over |
到包括 incl |
最小 Min |
最大 Max |
最小 Min |
最大 Max |
最小 Min |
最大 Max |
最小 Min |
最大 Max |
| 6 | 10 | 0 | 7 | 2 | 13 | 8 | 23 | 14 | 29 |
| 10 | 18 | 0 | 9 | 3 | 18 | 11 | 25 | 18 | 33 |
| 18 | 24 | 0 | 10 | 5 | 20 | 13 | 28 | 20 | 36 |
| 24 | 30 | 1 | 11 | 5 | 20 | 13 | 23 | 23 | 41 |
| 30 | 40 | 1 | 11 | 6 | 20 | 15 | 33 | 28 | 46 |
| 40 | 50 | 1 | 11 | 6 | 23 | 18 | 36 | 30 | 51 |