h11 tolerance (shaft, IT11)
Shaft tolerance class h11 per ISO 286-1:2010: fundamental deviation es = 0, grade IT11 (60 µm at ≤ 3 mm to 400 µm at 400–500 mm). For an exact size, open the calculator with h11 selected.
- Type
- Shaft
- Grade
- IT11
- Tolerance
- 60 … 400 µm
- Fund. deviation
- es = 0
h11 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | 0 | −60 | 3.000 | 2.940 | 0 | −0.060 | 0 / −0.00236 |
| 3 – 6 | 0 | −75 | 6.000 | 5.925 | 0 | −0.075 | 0 / −0.00295 |
| 6 – 10 | 0 | −90 | 10.000 | 9.910 | 0 | −0.090 | 0 / −0.00354 |
| 10 – 14 | 0 | −110 | 14.000 | 13.890 | 0 | −0.110 | 0 / −0.00433 |
| 14 – 18 | 0 | −110 | 18.000 | 17.890 | 0 | −0.110 | 0 / −0.00433 |
| 18 – 24 | 0 | −130 | 24.000 | 23.870 | 0 | −0.130 | 0 / −0.00512 |
| 24 – 30 | 0 | −130 | 30.000 | 29.870 | 0 | −0.130 | 0 / −0.00512 |
| 30 – 40 | 0 | −160 | 40.000 | 39.840 | 0 | −0.160 | 0 / −0.00630 |
| 40 – 50 | 0 | −160 | 50.000 | 49.840 | 0 | −0.160 | 0 / −0.00630 |
| 50 – 65 | 0 | −190 | 65.000 | 64.810 | 0 | −0.190 | 0 / −0.00748 |
| 65 – 80 | 0 | −190 | 80.000 | 79.810 | 0 | −0.190 | 0 / −0.00748 |
| 80 – 100 | 0 | −220 | 100.000 | 99.780 | 0 | −0.220 | 0 / −0.00866 |
| 100 – 120 | 0 | −220 | 120.000 | 119.780 | 0 | −0.220 | 0 / −0.00866 |
| 120 – 140 | 0 | −250 | 140.000 | 139.750 | 0 | −0.250 | 0 / −0.00984 |
| 140 – 160 | 0 | −250 | 160.000 | 159.750 | 0 | −0.250 | 0 / −0.00984 |
| 160 – 180 | 0 | −250 | 180.000 | 179.750 | 0 | −0.250 | 0 / −0.00984 |
| 180 – 200 | 0 | −290 | 200.000 | 199.710 | 0 | −0.290 | 0 / −0.01142 |
| 200 – 225 | 0 | −290 | 225.000 | 224.710 | 0 | −0.290 | 0 / −0.01142 |
| 225 – 250 | 0 | −290 | 250.000 | 249.710 | 0 | −0.290 | 0 / −0.01142 |
| 250 – 280 | 0 | −320 | 280.000 | 279.680 | 0 | −0.320 | 0 / −0.01260 |
| 280 – 315 | 0 | −320 | 315.000 | 314.680 | 0 | −0.320 | 0 / −0.01260 |
| 315 – 355 | 0 | −360 | 355.000 | 354.640 | 0 | −0.360 | 0 / −0.01417 |
| 355 – 400 | 0 | −360 | 400.000 | 399.640 | 0 | −0.360 | 0 / −0.01417 |
| 400 – 450 | 0 | −400 | 450.000 | 449.600 | 0 | −0.400 | 0 / −0.01575 |
| 450 – 500 | 0 | −400 | 500.000 | 499.600 | 0 | −0.400 | 0 / −0.01575 |
Deviations at the upper end of each range (Ø columns use that size); use the calculator for the exact size. — : not defined by ISO 286 for that size. Upper/Lower (mm) and inch columns are shown on wider screens.
About h11
h11 denotes a shaft tolerance zone with zero line deviation in the ISO 286 system. It is used in H11/h11 (Parts that must be located but need no precision: spacers, washers, covers on rough shafts.) and C11/h11 (Shaft-basis equivalent of H11/c11 for plain drawn shafting.).
At Ø25 mm h11 is 0 / −0.130 mm, i.e. 24.870 to 25.000 mm.
How the limits are calculated
h11 uses grade IT11 (a standard tolerance of 130 µm at 18–30 mm). Fundamental deviation: es = 0: the tolerance zone sits entirely below the nominal size, and IT11 sets its width. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.