This chart applies to cold drawn, precision ground and machined stainless steel round bars, fully compliant with ISO 286-2 international standard for shaft dimensions.
All tolerance values are based on upper deviation = 0, with the listed value as the maximum allowable negative deviation from the nominal diameter.
| Nominal Diameter Range (mm) | h8 Tolerance (mm) | h9 Tolerance (mm) | h10 Tolerance (mm) | h11 Tolerance (mm) |
| ＞2 ~ 6 | 0 / -0.018 | 0 / -0.030 | 0 / -0.048 | 0 / -0.075 |
| ＞6 ~ 10 | 0 / -0.022 | 0 / -0.036 | 0 / -0.058 | 0 / -0.090 |
| ＞10 ~ 18 | 0 / -0.027 | 0 / -0.043 | 0 / -0.070 | 0 / -0.110 |
| ＞18 ~ 30 | 0 / -0.033 | 0 / -0.052 | 0 / -0.084 | 0 / -0.130 |
| ＞30 ~ 50 | 0 / -0.039 | 0 / -0.062 | 0 / -0.100 | 0 / -0.160 |
| ＞50 ~ 80 | 0 / -0.046 | 0 / -0.074 | 0 / -0.120 | 0 / -0.190 |
| ＞80 ~ 120 | 0 / -0.054 | 0 / -0.087 | 0 / -0.140 | 0 / -0.220 |
| ＞120 ~ 180 | 0 / -0.063 | 0 / -0.100 | 0 / -0.160 | 0 / -0.250 |
| ＞180 ~ 250 | 0 / -0.072 | 0 / -0.115 | 0 / -0.185 | 0 / -0.290 |
| ＞250 ~ 315 | 0 / -0.081 | 0 / -0.130 | 0 / -0.210 | 0 / -0.320 |
Tolerance Grade Application Notes
h8/h9: High precision grade, for precision shafts, valve cores, hydraulic components and aerospace parts with strict dimensional requirements
h10: Medium precision grade, the most widely used for general machining, mechanical parts and conventional structural components
h11: Commercial grade, for non-precision structural parts, forging blanks and general industrial applications with low tolerance requirements
