E9/h9 fit — Free running fit (shaft basis)

ISO 286 shaft-basis clearance fit. Enter a nominal size to get the limits.

Nominal size

Unit

Result

Ø25.000 E9/h9Clearance fit

	Upper	Lower	Max	Min	Tol.
Hole E9	+0.092	+0.040	25.092	25.040	0.052
Shaft h9	0	−0.052	25.000	24.948	0.052

Max clearance: 0.144 mm
Min clearance: 0.040 mm
Mean: +0.092 mm

Fit diagram (µm · zero line = nominal)

Hole tolerance zoneShaft tolerance zoneClearance

About E9/h9

Shaft-basis equivalent of H9/e9.

At Ø25 mm the hole E9 measures +0.040 mm to +0.092 mm and the shaft h9 −0.052 mm to 0 mm, giving a clearance of 0.040 mm to 0.144 mm.

How the limits are calculated

Hole E9: fundamental deviation ES/EI per ISO 286-1 Table 2, standard tolerance IT9 = 52 µm for 18–30 mm. Shaft h9: fundamental deviation es = 0, IT9 = 52 µm. Clearance = hole − shaft, evaluated at both extremes. Values per ISO 286-1:2010.

E9/h9 limits by size range

Size (mm)	Hole E9	Shaft h9	Clearance min	Clearance max
≤ 3	+0.039 / +0.014	0 / −0.025	+0.014	+0.064
3 – 6	+0.050 / +0.020	0 / −0.030	+0.020	+0.080
6 – 10	+0.061 / +0.025	0 / −0.036	+0.025	+0.097
10 – 18	+0.075 / +0.032	0 / −0.043	+0.032	+0.118
18 – 30	+0.092 / +0.040	0 / −0.052	+0.040	+0.144
30 – 50	+0.112 / +0.050	0 / −0.062	+0.050	+0.174
50 – 80	+0.134 / +0.060	0 / −0.074	+0.060	+0.208
80 – 120	+0.159 / +0.072	0 / −0.087	+0.072	+0.246
120 – 180	+0.185 / +0.085	0 / −0.100	+0.085	+0.285
180 – 250	+0.215 / +0.100	0 / −0.115	+0.100	+0.330
250 – 315	+0.240 / +0.110	0 / −0.130	+0.110	+0.370
315 – 400	+0.265 / +0.125	0 / −0.140	+0.125	+0.405
400 – 500	+0.290 / +0.135	0 / −0.155	+0.135	+0.445

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.