h5 tolerance (shaft, IT5)
Shaft tolerance class h5 per ISO 286-1:2010: fundamental deviation es = 0, grade IT5 (4 µm at ≤ 3 mm to 27 µm at 400–500 mm). For an exact size, open the calculator with h5 selected.
- Type
- Shaft
- Grade
- IT5
- Tolerance
- 4 … 27 µm
- Fund. deviation
- es = 0
h5 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | 0 | −4 | 3.000 | 2.996 | 0 | −0.004 | 0 / −0.00016 |
| 3 – 6 | 0 | −5 | 6.000 | 5.995 | 0 | −0.005 | 0 / −0.00020 |
| 6 – 10 | 0 | −6 | 10.000 | 9.994 | 0 | −0.006 | 0 / −0.00024 |
| 10 – 14 | 0 | −8 | 14.000 | 13.992 | 0 | −0.008 | 0 / −0.00031 |
| 14 – 18 | 0 | −8 | 18.000 | 17.992 | 0 | −0.008 | 0 / −0.00031 |
| 18 – 24 | 0 | −9 | 24.000 | 23.991 | 0 | −0.009 | 0 / −0.00035 |
| 24 – 30 | 0 | −9 | 30.000 | 29.991 | 0 | −0.009 | 0 / −0.00035 |
| 30 – 40 | 0 | −11 | 40.000 | 39.989 | 0 | −0.011 | 0 / −0.00043 |
| 40 – 50 | 0 | −11 | 50.000 | 49.989 | 0 | −0.011 | 0 / −0.00043 |
| 50 – 65 | 0 | −13 | 65.000 | 64.987 | 0 | −0.013 | 0 / −0.00051 |
| 65 – 80 | 0 | −13 | 80.000 | 79.987 | 0 | −0.013 | 0 / −0.00051 |
| 80 – 100 | 0 | −15 | 100.000 | 99.985 | 0 | −0.015 | 0 / −0.00059 |
| 100 – 120 | 0 | −15 | 120.000 | 119.985 | 0 | −0.015 | 0 / −0.00059 |
| 120 – 140 | 0 | −18 | 140.000 | 139.982 | 0 | −0.018 | 0 / −0.00071 |
| 140 – 160 | 0 | −18 | 160.000 | 159.982 | 0 | −0.018 | 0 / −0.00071 |
| 160 – 180 | 0 | −18 | 180.000 | 179.982 | 0 | −0.018 | 0 / −0.00071 |
| 180 – 200 | 0 | −20 | 200.000 | 199.980 | 0 | −0.020 | 0 / −0.00079 |
| 200 – 225 | 0 | −20 | 225.000 | 224.980 | 0 | −0.020 | 0 / −0.00079 |
| 225 – 250 | 0 | −20 | 250.000 | 249.980 | 0 | −0.020 | 0 / −0.00079 |
| 250 – 280 | 0 | −23 | 280.000 | 279.977 | 0 | −0.023 | 0 / −0.00091 |
| 280 – 315 | 0 | −23 | 315.000 | 314.977 | 0 | −0.023 | 0 / −0.00091 |
| 315 – 355 | 0 | −25 | 355.000 | 354.975 | 0 | −0.025 | 0 / −0.00098 |
| 355 – 400 | 0 | −25 | 400.000 | 399.975 | 0 | −0.025 | 0 / −0.00098 |
| 400 – 450 | 0 | −27 | 450.000 | 449.973 | 0 | −0.027 | 0 / −0.00106 |
| 450 – 500 | 0 | −27 | 500.000 | 499.973 | 0 | −0.027 | 0 / −0.00106 |
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 h5
h5 denotes a shaft tolerance zone with zero line deviation in the ISO 286 system. It is used in H6/h5 (Precision parts located by the fit alone and assembled by hand, e.g. gauges and instrument components.) and G6/h5 (Shaft-basis equivalent of H6/g5, built around a ground reference shaft rather than a reamed hole: gauge blocks, instrument slides, precision jig components.).
At Ø25 mm h5 is 0 / −0.009 mm, i.e. 24.991 to 25.000 mm.
How the limits are calculated
h5 uses grade IT5 (a standard tolerance of 9 µm at 18–30 mm). Fundamental deviation: es = 0: the tolerance zone sits entirely below the nominal size, and IT5 sets its width. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.