Tolerance chart

d10 tolerance (shaft): ISO 286 chart up to 500 mm

d10 is an ISO tolerance class for shafts (external features) under ISO 286. At Ø25 mm it means −65 / −149 µm: the size may lie between 24.851 and 24.935 mm. Below are the deviations for every nominal size up to 500 mm and the fits that use d10.

Updated 2026-10-30 · Basis: ISO 286-1:2010 and ISO 286-2:2010 · irot Erstmuster

d10 chart: deviations for all nominal sizes up to 500 mm

Deviations in µm (1 µm = 0.001 mm). A nominal size belongs to the row »over … up to and including …«: exactly 30 mm is in the row ending at 30, 30.1 mm in the next one.

Nominal size over – to (mm)	Upper deviation	Lower deviation	Tolerance
0 – 3	−20	−60	40
3 – 6	−30	−78	48
6 – 10	−40	−98	58
10 – 18	−50	−120	70
18 – 30	−65	−149	84
30 – 50	−80	−180	100
50 – 80	−100	−220	120
80 – 120	−120	−260	140
120 – 180	−145	−305	160
180 – 250	−170	−355	185
250 – 315	−190	−400	210
315 – 400	−210	−440	230
400 – 500	−230	−480	250

d10 for your nominal size

How d10 is built

An ISO tolerance class is a letter and a number. Capital letters stand for holes, small letters for shafts. The letter d sets the position of the tolerance zone; at Ø25 mm it lies entirely below the nominal size: the shaft is always smaller than nominal. The number 10 is the standard tolerance grade IT10: it sets how wide the zone is – 84 µm at Ø25 mm.

The tolerance grows with the nominal size: 40 µm in the smallest row (0 – 3 mm), 250 µm in the largest (400 – 500 mm). On a drawing the class follows the dimension, as in »Ø25 d10«; the inspection plan turns that into the limits 24.851 and 24.935 mm.

Fits with d10 at Ø25 mm

Hole-basis system: the hole is H, the shaft d10. Clearance in µm; a minus means interference. Sorted from the largest minimum clearance to the largest interference.

Fit	Type	Max. clearance	Min. clearance
H10/d10	clearance fit	233	65
H11/d10	clearance fit	279	65

Frequently asked questions about d10

What does d10 mean?

d10 is an ISO tolerance class for shafts (external features): the letter d sets the position of the tolerance zone, the number 10 the standard tolerance grade IT10. At Ø25 mm that gives −65 / −149 µm, i.e. 24.851 to 24.935 mm.

What are the d10 limits at Ø10 and Ø50 mm?

Ø10 d10: −40 / −98 µm (9.902 to 9.960 mm). Ø50 d10: −80 / −180 µm (49.820 to 49.920 mm).

Is d10 a clearance fit?

A tolerance class on its own is not a fit – only together with its mating part. H11/d10 at Ø25 mm is a clearance fit (maximum clearance 279 µm, minimum clearance 65 µm; a minus means interference).

More tolerance classes

Same letter d, other grades: d9

All classes at a glance: ISO 286 tolerance charts. The same chart in German: d10 Toleranz.