When to use H7/p6
Certain interference: press or shrink assembly. For pressed bushes, fixed pins, parts transmitting torque by friction.
H7/p6 tolerances for every diameter
| Diameter (mm) | Hole H7 (µm) | Shaft p6 (µm) | Max clearance | Min clearance |
|---|---|---|---|---|
| ≤ 3 | +10 / 0 | +12 / +6 | +4 | -12 |
| 3–6 | +12 / 0 | +20 / +12 | 0 | -20 |
| 6–10 | +15 / 0 | +24 / +15 | 0 | -24 |
| 10–18 | +18 / 0 | +29 / +18 | 0 | -29 |
| 18–30 | +21 / 0 | +35 / +22 | -1 | -35 |
| 30–50 | +25 / 0 | +42 / +26 | -1 | -42 |
| 50–80 | +30 / 0 | +51 / +32 | -2 | -51 |
| 80–120 | +35 / 0 | +59 / +37 | -2 | -59 |
| 120–180 | +40 / 0 | +68 / +43 | -3 | -68 |
| 180–250 | +46 / 0 | +79 / +50 | -4 | -79 |
| 250–315 | +52 / 0 | +88 / +56 | -4 | -88 |
| 315–400 | +57 / 0 | +98 / +62 | -5 | -98 |
| 400–500 | +63 / 0 | +108 / +68 | -5 | -108 |
Negative clearance = interference: the shaft is larger than the hole. Values in micrometres (µm, thousandths of a millimetre). Diameter ranges: over the first value, up to and including the second.
Other fits
Values computed from the IT grades and fundamental deviations of ISO 286-1, checked against several published tables. For critical designs the standard itself is what counts.