H6/h5 fit — Precision locational fit
ISO 286 hole-basis clearance fit. Enter a nominal size to get the limits.
Result
| Upper | Lower | Max | Min | Tol. | |
|---|---|---|---|---|---|
| Hole H6 | +0.013 | 0 | 25.013 | 25.000 | |
| Shaft h5 | 0 | −0.009 | 25.000 | 24.991 |
- Max clearance
- 0.022 mm
- Min clearance
- 0.000 mm
- Mean
- +0.011 mm
Fit diagram (µm · zero line = nominal)
About H6/h5
Precision parts located by the fit alone and assembled by hand, e.g. gauges and instrument components.
At Ø25 mm the hole H6 measures 0 mm to +0.013 mm and the shaft h5 −0.009 mm to 0 mm, giving a clearance of 0.000 mm to 0.022 mm.
How the limits are calculated
Hole H6: fundamental deviation EI = 0, standard tolerance IT6 = 13 µm for 18–30 mm. Shaft h5: fundamental deviation es = 0, IT5 = 9 µm. Clearance = hole − shaft, evaluated at both extremes. Values per ISO 286-1:2010.
H6/h5 limits by size range
| Size (mm) | Hole H6 | Shaft h5 | Clearance min | Clearance max |
|---|---|---|---|---|
| ≤ 3 | +0.006 / 0 | 0 / −0.004 | 0 | +0.010 |
| 3 – 6 | +0.008 / 0 | 0 / −0.005 | 0 | +0.013 |
| 6 – 10 | +0.009 / 0 | 0 / −0.006 | 0 | +0.015 |
| 10 – 18 | +0.011 / 0 | 0 / −0.008 | 0 | +0.019 |
| 18 – 30 | +0.013 / 0 | 0 / −0.009 | 0 | +0.022 |
| 30 – 50 | +0.016 / 0 | 0 / −0.011 | 0 | +0.027 |
| 50 – 80 | +0.019 / 0 | 0 / −0.013 | 0 | +0.032 |
| 80 – 120 | +0.022 / 0 | 0 / −0.015 | 0 | +0.037 |
| 120 – 180 | +0.025 / 0 | 0 / −0.018 | 0 | +0.043 |
| 180 – 250 | +0.029 / 0 | 0 / −0.020 | 0 | +0.049 |
| 250 – 315 | +0.032 / 0 | 0 / −0.023 | 0 | +0.055 |
| 315 – 400 | +0.036 / 0 | 0 / −0.025 | 0 | +0.061 |
| 400 – 500 | +0.040 / 0 | 0 / −0.027 | 0 | +0.067 |
Deviations in mm at the upper end of each range; negative clearance = interference. Clearance columns are shown on wider screens. Sub-ranges (e.g. 18–24 / 24–30) can differ for r, s, t, u, v, x, y, z — use the calculator for the exact size.