g5 tolerance (shaft, IT5)
Shaft tolerance class g5 per ISO 286-1:2010: fundamental deviation es −2 … −20, grade IT5 (4 µm at ≤ 3 mm to 27 µm at 400–500 mm). For an exact size, open the calculator with g5 selected.
- Type
- Shaft
- Grade
- IT5
- Tolerance
- 4 … 27 µm
- Fund. deviation
- es −2 … −20 µm
g5 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | −2 | −6 | 2.998 | 2.994 | −0.002 | −0.006 | −0.00008 / −0.00024 |
| 3 – 6 | −4 | −9 | 5.996 | 5.991 | −0.004 | −0.009 | −0.00016 / −0.00035 |
| 6 – 10 | −5 | −11 | 9.995 | 9.989 | −0.005 | −0.011 | −0.00020 / −0.00043 |
| 10 – 14 | −6 | −14 | 13.994 | 13.986 | −0.006 | −0.014 | −0.00024 / −0.00055 |
| 14 – 18 | −6 | −14 | 17.994 | 17.986 | −0.006 | −0.014 | −0.00024 / −0.00055 |
| 18 – 24 | −7 | −16 | 23.993 | 23.984 | −0.007 | −0.016 | −0.00028 / −0.00063 |
| 24 – 30 | −7 | −16 | 29.993 | 29.984 | −0.007 | −0.016 | −0.00028 / −0.00063 |
| 30 – 40 | −9 | −20 | 39.991 | 39.980 | −0.009 | −0.020 | −0.00035 / −0.00079 |
| 40 – 50 | −9 | −20 | 49.991 | 49.980 | −0.009 | −0.020 | −0.00035 / −0.00079 |
| 50 – 65 | −10 | −23 | 64.990 | 64.977 | −0.010 | −0.023 | −0.00039 / −0.00091 |
| 65 – 80 | −10 | −23 | 79.990 | 79.977 | −0.010 | −0.023 | −0.00039 / −0.00091 |
| 80 – 100 | −12 | −27 | 99.988 | 99.973 | −0.012 | −0.027 | −0.00047 / −0.00106 |
| 100 – 120 | −12 | −27 | 119.988 | 119.973 | −0.012 | −0.027 | −0.00047 / −0.00106 |
| 120 – 140 | −14 | −32 | 139.986 | 139.968 | −0.014 | −0.032 | −0.00055 / −0.00126 |
| 140 – 160 | −14 | −32 | 159.986 | 159.968 | −0.014 | −0.032 | −0.00055 / −0.00126 |
| 160 – 180 | −14 | −32 | 179.986 | 179.968 | −0.014 | −0.032 | −0.00055 / −0.00126 |
| 180 – 200 | −15 | −35 | 199.985 | 199.965 | −0.015 | −0.035 | −0.00059 / −0.00138 |
| 200 – 225 | −15 | −35 | 224.985 | 224.965 | −0.015 | −0.035 | −0.00059 / −0.00138 |
| 225 – 250 | −15 | −35 | 249.985 | 249.965 | −0.015 | −0.035 | −0.00059 / −0.00138 |
| 250 – 280 | −17 | −40 | 279.983 | 279.960 | −0.017 | −0.040 | −0.00067 / −0.00157 |
| 280 – 315 | −17 | −40 | 314.983 | 314.960 | −0.017 | −0.040 | −0.00067 / −0.00157 |
| 315 – 355 | −18 | −43 | 354.982 | 354.957 | −0.018 | −0.043 | −0.00071 / −0.00169 |
| 355 – 400 | −18 | −43 | 399.982 | 399.957 | −0.018 | −0.043 | −0.00071 / −0.00169 |
| 400 – 450 | −20 | −47 | 449.980 | 449.953 | −0.020 | −0.047 | −0.00079 / −0.00185 |
| 450 – 500 | −20 | −47 | 499.980 | 499.953 | −0.020 | −0.047 | −0.00079 / −0.00185 |
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 g5
g5 denotes a shaft tolerance zone with sliding deviation in the ISO 286 system. It is used in H6/g5 (High-precision sliding parts with minimum play: measuring instrument spindles, precision guide pins.).
At Ø25 mm g5 is −0.007 / −0.016 mm, i.e. 24.984 to 24.993 mm.
How the limits are calculated
g5 uses grade IT5 (a standard tolerance of 9 µm at 18–30 mm). Fundamental deviation: es is tabulated directly by ISO 286-1 Table 2; ei = es − IT5. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.