| CLASS | Nominal Dia.mm | Tolerances (U) | Tolerances Per group(U) | Mean interval of each group (U) | Spherical deviation | ||||||||||
| Ⅰ | 10Max | 10.25 | 0.5 | -10~-1.5 | -1 | -0.5 | 0 | +0.5 | +1 | +1.5~+10 | 0.25 | ||||
| Ⅱ | 25Max | 10.50 | 1 | -10~-3 | -2 | -1 | 0 | +1 | +2 | +3~+10 | 0.5 | ||||
| Ⅲ | 25Max | 11 | 2 | -10 | -8 | -6 | -4 | -2 | 0 | +2 | +4 | +6 | +8 | +10 | 1 |
| 25-50 | 13.5 | 3 | -12 | -9 | -6 | -3 | 0 | +3 | +6 | +9 | +12 | 1.5 | |||
| 59-75 | 14 | 4 | -12 | -8 | -4 | 0 | +4 | +8 | +12 | 2 | |||||
| 75-100 | 17.5 | 5 | -15 | -10 | -5 | 0 | +5 | +10 | +15 | 2.5 | |||||
| 100-125 | 21 | -18 | -12 | -6 | 0 | +6 | +12 | +18 | 3 | ||||||
| 125-150 | 24.5 | 7 | -21 | -14 | -7 | 0 | +7 | +14 | +21 | 3.5 | |||||
| Ⅳ | 10Max | 14 | 4 | -12 | -8 | -4 | 0 | +4 | +8 | +12 | 2 | ||||
| Ⅴ | 25Max | 75 | 50 | -50 | 0 | +50 | 25 | ||||||||
| 25-50 | 113 | 75 | -75 | 0 | +75 | 38 | |||||||||
| 50-70 | 150 | 100 | -100 | 0 | +100 | 50 | |||||||||
| 75-100 | 188 | 125 | -125 | 0 | +125 | 63 | |||||||||
| 100-125 | 225 | 150 | -150 | 0 | +150 | 75 | |||||||||
| 125-150 | 263 | 175 | -175 | 0 | +175 | 88 | |||||||||
| Ⅵ | 200 | 400 | |||||||||||||
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