精度高*与公差
| 等级 | 球直径变动量 | 批直径变动量 | 球形误差 | 表面粗糙度 | 规值 |
| 不超过（um） | |||||
| 3 | 0.08 | 0.13 | 0.08 | 0.010 | ±5 |
| 5 | 0.13 | 0.25 | 0.13 | 0.014 | ±5 |
| 10 | 0.25 | 0.5 | 0.25 | 0.020 | ±9 |
| 16 | 0.4 | 0.8 | 0.4 | 0.025 | ±10 |
| 20 | 0.5 | 1 | 0.5 | 0.032 | ±10 |
| 24 | 0.6 | 1.2 | 0.6 | 0.040 | ±12 |
| 28 | 0.7 | 1.4 | 0.7 | 0.050 | ±12 |
| 40 | 1 | 2 | 1 | 0.060 | ±16 |
| 60 | 1.5 | 3 | 1.5 | 0.080 | ±20 |
| 100 | 2.5 | 5 | 2.5 | 0.100 | ±40 |
| 200 | 5 | 10 | 5 | 0.150 | ±60 |
