H11/d11 fit — Loose running fit

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

Nominal size

Unit

Result

Ø25.000 H11/d11Clearance fit

	Upper	Lower	Max	Min	Tol.
Hole H11	+0.130	0	25.130	25.000	0.130
Shaft d11	−0.065	−0.195	24.935	24.805	0.130

Max clearance: 0.325 mm
Min clearance: 0.065 mm
Mean: +0.195 mm

Fit diagram (µm · zero line = nominal)

Hole tolerance zoneShaft tolerance zoneClearance

About H11/d11

Free-running parts with generous clearance, e.g. loose bushes and idler wheels on rough shafts.

At Ø25 mm the hole H11 measures 0 mm to +0.130 mm and the shaft d11 −0.195 mm to −0.065 mm, giving a clearance of 0.065 mm to 0.325 mm.

How the limits are calculated

Hole H11: fundamental deviation EI = 0, standard tolerance IT11 = 130 µm for 18–30 mm. Shaft d11: fundamental deviation es = -65 µm, IT11 = 130 µm. Clearance = hole − shaft, evaluated at both extremes. Values per ISO 286-1:2010.

H11/d11 limits by size range

Size (mm)	Hole H11	Shaft d11	Clearance min	Clearance max
≤ 3	+0.060 / 0	−0.020 / −0.080	+0.020	+0.140
3 – 6	+0.075 / 0	−0.030 / −0.105	+0.030	+0.180
6 – 10	+0.090 / 0	−0.040 / −0.130	+0.040	+0.220
10 – 18	+0.110 / 0	−0.050 / −0.160	+0.050	+0.270
18 – 30	+0.130 / 0	−0.065 / −0.195	+0.065	+0.325
30 – 50	+0.160 / 0	−0.080 / −0.240	+0.080	+0.400
50 – 80	+0.190 / 0	−0.100 / −0.290	+0.100	+0.480
80 – 120	+0.220 / 0	−0.120 / −0.340	+0.120	+0.560
120 – 180	+0.250 / 0	−0.145 / −0.395	+0.145	+0.645
180 – 250	+0.290 / 0	−0.170 / −0.460	+0.170	+0.750
250 – 315	+0.320 / 0	−0.190 / −0.510	+0.190	+0.830
315 – 400	+0.360 / 0	−0.210 / −0.570	+0.210	+0.930
400 – 500	+0.400 / 0	−0.230 / −0.630	+0.230	+1.030

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.