s7 tolerance (shaft, IT7)
Shaft tolerance class s7 per ISO 286-1:2010: fundamental deviation ei +14 … +252, grade IT7 (10 µm at ≤ 3 mm to 63 µm at 400–500 mm). For an exact size, open the calculator with s7 selected.
- Type
- Shaft
- Grade
- IT7
- Tolerance
- 10 … 63 µm
- Fund. deviation
- ei +14 … +252 µm
s7 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | +24 | +14 | 3.024 | 3.014 | +0.024 | +0.014 | +0.00094 / +0.00055 |
| 3 – 6 | +31 | +19 | 6.031 | 6.019 | +0.031 | +0.019 | +0.00122 / +0.00075 |
| 6 – 10 | +38 | +23 | 10.038 | 10.023 | +0.038 | +0.023 | +0.00150 / +0.00091 |
| 10 – 14 | +46 | +28 | 14.046 | 14.028 | +0.046 | +0.028 | +0.00181 / +0.00110 |
| 14 – 18 | +46 | +28 | 18.046 | 18.028 | +0.046 | +0.028 | +0.00181 / +0.00110 |
| 18 – 24 | +56 | +35 | 24.056 | 24.035 | +0.056 | +0.035 | +0.00220 / +0.00138 |
| 24 – 30 | +56 | +35 | 30.056 | 30.035 | +0.056 | +0.035 | +0.00220 / +0.00138 |
| 30 – 40 | +68 | +43 | 40.068 | 40.043 | +0.068 | +0.043 | +0.00268 / +0.00169 |
| 40 – 50 | +68 | +43 | 50.068 | 50.043 | +0.068 | +0.043 | +0.00268 / +0.00169 |
| 50 – 65 | +83 | +53 | 65.083 | 65.053 | +0.083 | +0.053 | +0.00327 / +0.00209 |
| 65 – 80 | +89 | +59 | 80.089 | 80.059 | +0.089 | +0.059 | +0.00350 / +0.00232 |
| 80 – 100 | +106 | +71 | 100.106 | 100.071 | +0.106 | +0.071 | +0.00417 / +0.00280 |
| 100 – 120 | +114 | +79 | 120.114 | 120.079 | +0.114 | +0.079 | +0.00449 / +0.00311 |
| 120 – 140 | +132 | +92 | 140.132 | 140.092 | +0.132 | +0.092 | +0.00520 / +0.00362 |
| 140 – 160 | +140 | +100 | 160.140 | 160.100 | +0.140 | +0.100 | +0.00551 / +0.00394 |
| 160 – 180 | +148 | +108 | 180.148 | 180.108 | +0.148 | +0.108 | +0.00583 / +0.00425 |
| 180 – 200 | +168 | +122 | 200.168 | 200.122 | +0.168 | +0.122 | +0.00661 / +0.00480 |
| 200 – 225 | +176 | +130 | 225.176 | 225.130 | +0.176 | +0.130 | +0.00693 / +0.00512 |
| 225 – 250 | +186 | +140 | 250.186 | 250.140 | +0.186 | +0.140 | +0.00732 / +0.00551 |
| 250 – 280 | +210 | +158 | 280.210 | 280.158 | +0.210 | +0.158 | +0.00827 / +0.00622 |
| 280 – 315 | +222 | +170 | 315.222 | 315.170 | +0.222 | +0.170 | +0.00874 / +0.00669 |
| 315 – 355 | +247 | +190 | 355.247 | 355.190 | +0.247 | +0.190 | +0.00972 / +0.00748 |
| 355 – 400 | +265 | +208 | 400.265 | 400.208 | +0.265 | +0.208 | +0.01043 / +0.00819 |
| 400 – 450 | +295 | +232 | 450.295 | 450.232 | +0.295 | +0.232 | +0.01161 / +0.00913 |
| 450 – 500 | +315 | +252 | 500.315 | 500.252 | +0.315 | +0.252 | +0.01240 / +0.00992 |
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 s7
s7 denotes a shaft tolerance zone with heavy interference deviation in the ISO 286 system. It is used in H8/s7 (Coarser permanent press fit for general machinery.).
At Ø25 mm s7 is +0.056 / +0.035 mm, i.e. 25.035 to 25.056 mm.
How the limits are calculated
s7 uses grade IT7 (a standard tolerance of 21 µm at 18–30 mm). Fundamental deviation: ei is tabulated directly by ISO 286-1 Table 2; es = ei + IT7. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.