technical
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Form and Surface Roughness Tolerances
Form and Surface Roughness Tolerances
Tolerance values in micrometers
Grade | Ball Gauge | Ball Subgauge | Ball Diameter Variation | Ball Lot Diameter Variation | Deviation from Spherical Form | Surface Roughness |
G5 | ±5 | ±0.4 | 0.13 | 0.25 | 0.13 | 0.014 |
G10 | ±10 | ±0.4 | 0.25 | 0.5 | 0.25 | 0.020 |
G16 | ±10 | ±0.8 | 0.4 | 0.8 | 0.4 | 0.025 |
G20 | ±10 | ±0.8 | 0.5 | 1 | 0.5 | 0.032 |
G24 | ±12 | ±0.8 | 0.6 | 1.2 | 0.6 | 0.040 |
G28 | ±12 | ±0.8 | 0.7 | 1.4 | 0.7 | 0.050 |
G40 | ±16 | ±1.6 | 1 | 2 | 1 | 0.080 |
G60 | ±16 | ±2.4 | 1.5 | 3 | 1.5 | 0.1 |
G100 | ±40 | ±4 | 2.5 | 5 | 2.5 | 0.125 |