ISO 286

ISO 286 — Engineering Fits

Calculates limit deviations and clearance/interference for hole-basis fits per ISO 286-1. Select an ISO preferred fit or enter a custom tolerance code.

Nominal diameter

mm

Select fit

H7/k6Transition
NOMBoreH7BoreES +21 µmEI +0 µmITAirk6Shaftes +15 µmei +2 µmITØ25 mm · H7/k6

Hole — H7

Upper dev
+21 µm
Lower dev
+0 µm
Max size
25.0210 mm
Min size
25.0000 mm

Shaft — k6

Upper dev
+15 µm
Lower dev
+2 µm
Max size
25.0150 mm
Min size
25.0020 mm
Max clearance
19 µm
Max interference
15 µm

Values for reference only — verify against applicable design standards before use.