H6/js5 fit — Precision transition

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

Nominal size

Unit

Result

Ø25.000 H6/js5Transition fit

	Upper	Lower	Max	Min	Tol.
Hole H6	+0.013	0	25.013	25.000	0.013
Shaft js5	+0.0045	−0.0045	25.0045	24.9955	0.009

Max clearance: 0.0175 mm
Max interference: 0.0045 mm
Mean: +0.0065 mm

Fit diagram (µm · zero line = nominal)

Hole tolerance zoneShaft tolerance zoneClearanceInterference

About H6/js5

Precision parts needing accurate location with easy assembly.

At Ø25 mm the hole H6 measures 0 mm to +0.013 mm and the shaft js5 −0.0045 mm to +0.0045 mm, giving between 0.0045 mm interference and 0.0175 mm clearance.

How the limits are calculated

Hole H6: fundamental deviation EI = 0, standard tolerance IT6 = 13 µm for 18–30 mm. Shaft js5: fundamental deviation ei = -4.5 µm, IT5 = 9 µm. Clearance = hole − shaft, evaluated at both extremes. Values per ISO 286-1:2010.

H6/js5 limits by size range

Size (mm)	Hole H6	Shaft js5	Clearance min	Clearance max
≤ 3	+0.006 / 0	+0.002 / −0.002	−0.002	+0.008
3 – 6	+0.008 / 0	+0.0025 / −0.0025	−0.0025	+0.0105
6 – 10	+0.009 / 0	+0.003 / −0.003	−0.003	+0.012
10 – 18	+0.011 / 0	+0.004 / −0.004	−0.004	+0.015
18 – 30	+0.013 / 0	+0.0045 / −0.0045	−0.0045	+0.0175
30 – 50	+0.016 / 0	+0.0055 / −0.0055	−0.0055	+0.0215
50 – 80	+0.019 / 0	+0.0065 / −0.0065	−0.0065	+0.0255
80 – 120	+0.022 / 0	+0.0075 / −0.0075	−0.0075	+0.0295
120 – 180	+0.025 / 0	+0.009 / −0.009	−0.009	+0.034
180 – 250	+0.029 / 0	+0.010 / −0.010	−0.010	+0.039
250 – 315	+0.032 / 0	+0.0115 / −0.0115	−0.0115	+0.0435
315 – 400	+0.036 / 0	+0.0125 / −0.0125	−0.0125	+0.0485
400 – 500	+0.040 / 0	+0.0135 / −0.0135	−0.0135	+0.0535

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.