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스틸 볼 표준
스틸 볼 표준Grade | Ball diameter variation | Deviation from spherical form | Surface roughness | Lot diameter variation | ｓｅｌｅｃｔ group interval |
(VDws)(μm)（a） | (tDw)(μm)（a） | (Ra)(μm)（a） | (VDwL)(μm) | (IG) | |
3 | 0.08 | 0.08 | 0.010 | 0.13 | 0.5 |
5 | 0.13 | 0.13 | 0.014 | 0.25 | 1 |
10 | 0.25 | 0.25 | 0.020 | 0.5 | 1 |
16 | 0.4 | 0.4 | 0.025 | 0.8 | 2 |
30 | 0.5 | 0.5 | 0.032 | 1 | 2 |
35 | 0.6 | 0.6 | 0.040 | 1.2 | 2 |
39 | 0.7 | 0.7 | 0.050 | 1.4 | 2 |
40 | 1 | 1 | 0.060 | 2 | 4 |
60 | 1.5 | 1.5 | 0.080 | 3 | 6 |
100 | 2.5 | 2.5 | 0.100 | 5 | 10 |
200 | 5 | 5 | 0.150 | 10 | 15 |