x6 tolerance (shaft, IT6)
Shaft tolerance class x6 per ISO 286-1:2010: fundamental deviation ei +20 … +820, grade IT6 (6 µm at ≤ 3 mm to 40 µm at 400–500 mm). For an exact size, open the calculator with x6 selected.
- Type
- Shaft
- Grade
- IT6
- Tolerance
- 6 … 40 µm
- Fund. deviation
- ei +20 … +820 µm
x6 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | +26 | +20 | 3.026 | 3.020 | +0.026 | +0.020 | +0.00102 / +0.00079 |
| 3 – 6 | +36 | +28 | 6.036 | 6.028 | +0.036 | +0.028 | +0.00142 / +0.00110 |
| 6 – 10 | +43 | +34 | 10.043 | 10.034 | +0.043 | +0.034 | +0.00169 / +0.00134 |
| 10 – 14 | +51 | +40 | 14.051 | 14.040 | +0.051 | +0.040 | +0.00201 / +0.00157 |
| 14 – 18 | +56 | +45 | 18.056 | 18.045 | +0.056 | +0.045 | +0.00220 / +0.00177 |
| 18 – 24 | +67 | +54 | 24.067 | 24.054 | +0.067 | +0.054 | +0.00264 / +0.00213 |
| 24 – 30 | +77 | +64 | 30.077 | 30.064 | +0.077 | +0.064 | +0.00303 / +0.00252 |
| 30 – 40 | +96 | +80 | 40.096 | 40.080 | +0.096 | +0.080 | +0.00378 / +0.00315 |
| 40 – 50 | +113 | +97 | 50.113 | 50.097 | +0.113 | +0.097 | +0.00445 / +0.00382 |
| 50 – 65 | +141 | +122 | 65.141 | 65.122 | +0.141 | +0.122 | +0.00555 / +0.00480 |
| 65 – 80 | +165 | +146 | 80.165 | 80.146 | +0.165 | +0.146 | +0.00650 / +0.00575 |
| 80 – 100 | +200 | +178 | 100.200 | 100.178 | +0.200 | +0.178 | +0.00787 / +0.00701 |
| 100 – 120 | +232 | +210 | 120.232 | 120.210 | +0.232 | +0.210 | +0.00913 / +0.00827 |
| 120 – 140 | +273 | +248 | 140.273 | 140.248 | +0.273 | +0.248 | +0.01075 / +0.00976 |
| 140 – 160 | +305 | +280 | 160.305 | 160.280 | +0.305 | +0.280 | +0.01201 / +0.01102 |
| 160 – 180 | +335 | +310 | 180.335 | 180.310 | +0.335 | +0.310 | +0.01319 / +0.01220 |
| 180 – 200 | +379 | +350 | 200.379 | 200.350 | +0.379 | +0.350 | +0.01492 / +0.01378 |
| 200 – 225 | +414 | +385 | 225.414 | 225.385 | +0.414 | +0.385 | +0.01630 / +0.01516 |
| 225 – 250 | +454 | +425 | 250.454 | 250.425 | +0.454 | +0.425 | +0.01787 / +0.01673 |
| 250 – 280 | +507 | +475 | 280.507 | 280.475 | +0.507 | +0.475 | +0.01996 / +0.01870 |
| 280 – 315 | +557 | +525 | 315.557 | 315.525 | +0.557 | +0.525 | +0.02193 / +0.02067 |
| 315 – 355 | +626 | +590 | 355.626 | 355.590 | +0.626 | +0.590 | +0.02465 / +0.02323 |
| 355 – 400 | +696 | +660 | 400.696 | 400.660 | +0.696 | +0.660 | +0.02740 / +0.02598 |
| 400 – 450 | +780 | +740 | 450.780 | 450.740 | +0.780 | +0.740 | +0.03071 / +0.02913 |
| 450 – 500 | +860 | +820 | 500.860 | 500.820 | +0.860 | +0.820 | +0.03386 / +0.03228 |
Deviations at the upper end of each range (Ø columns use that size); use the calculator for the exact size. — : not defined by ISO 286 for that size. Upper/Lower (mm) and inch columns are shown on wider screens.
About x6
x6 denotes a shaft tolerance zone with heavy interference deviation in the ISO 286 system. It is used in H7/x6 (The heaviest standard shrink/press fit, for permanent, high-torque assemblies; expect to heat the hub or cool the shaft substantially before assembly.).
At Ø25 mm x6 is +0.077 / +0.064 mm, i.e. 25.064 to 25.077 mm.
How the limits are calculated
x6 uses grade IT6 (a standard tolerance of 13 µm at 18–30 mm). Fundamental deviation: ei is tabulated directly by ISO 286-1 Table 2; es = ei + IT6. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.