g6 tolerance (shaft, IT6)
Shaft tolerance class g6 per ISO 286-1:2010: fundamental deviation es −2 … −20, grade IT6 (6 µm at ≤ 3 mm to 40 µm at 400–500 mm). For an exact size, open the calculator with g6 selected.
- Type
- Shaft
- Grade
- IT6
- Tolerance
- 6 … 40 µm
- Fund. deviation
- es −2 … −20 µm
g6 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | −2 | −8 | 2.998 | 2.992 | −0.002 | −0.008 | −0.00008 / −0.00031 |
| 3 – 6 | −4 | −12 | 5.996 | 5.988 | −0.004 | −0.012 | −0.00016 / −0.00047 |
| 6 – 10 | −5 | −14 | 9.995 | 9.986 | −0.005 | −0.014 | −0.00020 / −0.00055 |
| 10 – 14 | −6 | −17 | 13.994 | 13.983 | −0.006 | −0.017 | −0.00024 / −0.00067 |
| 14 – 18 | −6 | −17 | 17.994 | 17.983 | −0.006 | −0.017 | −0.00024 / −0.00067 |
| 18 – 24 | −7 | −20 | 23.993 | 23.980 | −0.007 | −0.020 | −0.00028 / −0.00079 |
| 24 – 30 | −7 | −20 | 29.993 | 29.980 | −0.007 | −0.020 | −0.00028 / −0.00079 |
| 30 – 40 | −9 | −25 | 39.991 | 39.975 | −0.009 | −0.025 | −0.00035 / −0.00098 |
| 40 – 50 | −9 | −25 | 49.991 | 49.975 | −0.009 | −0.025 | −0.00035 / −0.00098 |
| 50 – 65 | −10 | −29 | 64.990 | 64.971 | −0.010 | −0.029 | −0.00039 / −0.00114 |
| 65 – 80 | −10 | −29 | 79.990 | 79.971 | −0.010 | −0.029 | −0.00039 / −0.00114 |
| 80 – 100 | −12 | −34 | 99.988 | 99.966 | −0.012 | −0.034 | −0.00047 / −0.00134 |
| 100 – 120 | −12 | −34 | 119.988 | 119.966 | −0.012 | −0.034 | −0.00047 / −0.00134 |
| 120 – 140 | −14 | −39 | 139.986 | 139.961 | −0.014 | −0.039 | −0.00055 / −0.00154 |
| 140 – 160 | −14 | −39 | 159.986 | 159.961 | −0.014 | −0.039 | −0.00055 / −0.00154 |
| 160 – 180 | −14 | −39 | 179.986 | 179.961 | −0.014 | −0.039 | −0.00055 / −0.00154 |
| 180 – 200 | −15 | −44 | 199.985 | 199.956 | −0.015 | −0.044 | −0.00059 / −0.00173 |
| 200 – 225 | −15 | −44 | 224.985 | 224.956 | −0.015 | −0.044 | −0.00059 / −0.00173 |
| 225 – 250 | −15 | −44 | 249.985 | 249.956 | −0.015 | −0.044 | −0.00059 / −0.00173 |
| 250 – 280 | −17 | −49 | 279.983 | 279.951 | −0.017 | −0.049 | −0.00067 / −0.00193 |
| 280 – 315 | −17 | −49 | 314.983 | 314.951 | −0.017 | −0.049 | −0.00067 / −0.00193 |
| 315 – 355 | −18 | −54 | 354.982 | 354.946 | −0.018 | −0.054 | −0.00071 / −0.00213 |
| 355 – 400 | −18 | −54 | 399.982 | 399.946 | −0.018 | −0.054 | −0.00071 / −0.00213 |
| 400 – 450 | −20 | −60 | 449.980 | 449.940 | −0.020 | −0.060 | −0.00079 / −0.00236 |
| 450 – 500 | −20 | −60 | 499.980 | 499.940 | −0.020 | −0.060 | −0.00079 / −0.00236 |
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 g6
g6 denotes a shaft tolerance zone with sliding deviation in the ISO 286 system. It is used in H7/g6 (Precision sliding parts that must move without perceptible play: spindles, sliding gears, guide pins, plungers.).
At Ø25 mm g6 is −0.007 / −0.020 mm, i.e. 24.980 to 24.993 mm.
How the limits are calculated
g6 uses grade IT6 (a standard tolerance of 13 µm at 18–30 mm). Fundamental deviation: es is tabulated directly by ISO 286-1 Table 2; ei = es − IT6. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.