Shaft tolerance zone
Lowercase letters identify shaft tolerance zones.
ISO 286 REFERENCE TABLE · SHAFT
c11 tolerance chart: ISO 286 shaft limits by size
Static c11 deviations and shaft limits at the upper-bound nominal of every ISO 286 size band from 1 to 500 mm.This page answers a class-specific c11 tolerance chart query. The ISO 286 fits calculator remains the tool for arbitrary nominal sizes, paired hole/shaft callouts, measured values, and shareable calculations.
13 ISO 286 SIZE BANDS
c11 shaft limits by representative nominal size
Each representative nominal is the upper boundary of its displayed size band. Deviations and IT width are shown in micrometres; the resulting minimum and maximum are shown in millimetres.| Size band (mm) | Representative nominal (mm) | Upper deviation (µm) | Lower deviation (µm) | IT11 width (µm) | Minimum / maximum (mm) |
|---|---|---|---|---|---|
| [1, 3] | 3 | −60 | −120 | 60 | 2.880 / 2.940 |
| (3, 6] | 6 | −70 | −145 | 75 | 5.855 / 5.930 |
| (6, 10] | 10 | −80 | −170 | 90 | 9.830 / 9.920 |
| (10, 18] | 18 | −95 | −205 | 110 | 17.795 / 17.905 |
| (18, 30] | 30 | −110 | −240 | 130 | 29.760 / 29.890 |
| (30, 50] | 50 | −130 | −290 | 160 | 49.710 / 49.870 |
| (50, 80] | 80 | −150 | −340 | 190 | 79.660 / 79.850 |
| (80, 120] | 120 | −180 | −400 | 220 | 119.600 / 119.820 |
| (120, 180] | 180 | −230 | −480 | 250 | 179.520 / 179.770 |
| (180, 250] | 250 | −280 | −570 | 290 | 249.430 / 249.720 |
| (250, 315] | 315 | −330 | −650 | 320 | 314.350 / 314.670 |
| (315, 400] | 400 | −400 | −760 | 360 | 399.240 / 399.600 |
| (400, 500] | 500 | −480 | −880 | 400 | 499.120 / 499.520 |
The IT11 tolerance width is constant within each displayed size band. Values shown are calculated at the representative upper-bound nominal. Some letter zones use finer fundamental-deviation sub-bands, so deviations may vary within a displayed band; use the calculator for the exact nominal.
Within a band where the deviations are unchanged, the micrometre deviations stay fixed while the absolute millimetre limits move with the selected nominal size.
DRAWING EXAMPLES
Common c11 callouts
c11 places a wide shaft zone well below nominal and is the shaft member of the H11/c11 very-loose running fit. Examples you can check across different size bands include:25 MM WORKED CALLOUT25 c11 → 24.760 / 24.890 mm
- Upper deviation
- −110 µm
- Lower deviation
- −240 µm
- IT11 width
- 130 µm
READ THE CLASS CORRECTLY
c11: shaft zone c, IT grade 11
IT tolerance grade
The grade selects the published tolerance width for each nominal-size band.
Deviation to absolute limit
Each deviation is added to the exact nominal diameter after conversion from micrometres to millimetres.
This static table is an engineering reference, not a replacement for a controlled drawing or licensed ISO 286 standard. Confirm standard edition, feature function, geometry, surface finish, and inspection method.
Return to the ISO 286 fits & tolerance calculator