JS6 tolerance (hole, IT6)
Hole tolerance class JS6 per ISO 286-1:2010: fundamental deviation ±IT/2, grade IT6 (6 µm at ≤ 3 mm to 40 µm at 400–500 mm). For an exact size, open the calculator with JS6 selected.
- Type
- Hole
- Grade
- IT6
- Tolerance
- 6 … 40 µm
- Fund. deviation
- ±IT/2
JS6 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | +3 | −3 | 3.003 | 2.997 | +0.0030 | −0.0030 | +0.00012 / −0.00012 |
| 3 – 6 | +4 | −4 | 6.004 | 5.996 | +0.0040 | −0.0040 | +0.00016 / −0.00016 |
| 6 – 10 | +4.5 | −4.5 | 10.0045 | 9.9955 | +0.0045 | −0.0045 | +0.00018 / −0.00018 |
| 10 – 14 | +5.5 | −5.5 | 14.0055 | 13.9945 | +0.0055 | −0.0055 | +0.00022 / −0.00022 |
| 14 – 18 | +5.5 | −5.5 | 18.0055 | 17.9945 | +0.0055 | −0.0055 | +0.00022 / −0.00022 |
| 18 – 24 | +6.5 | −6.5 | 24.0065 | 23.9935 | +0.0065 | −0.0065 | +0.00026 / −0.00026 |
| 24 – 30 | +6.5 | −6.5 | 30.0065 | 29.9935 | +0.0065 | −0.0065 | +0.00026 / −0.00026 |
| 30 – 40 | +8 | −8 | 40.008 | 39.992 | +0.0080 | −0.0080 | +0.00031 / −0.00031 |
| 40 – 50 | +8 | −8 | 50.008 | 49.992 | +0.0080 | −0.0080 | +0.00031 / −0.00031 |
| 50 – 65 | +9.5 | −9.5 | 65.0095 | 64.9905 | +0.0095 | −0.0095 | +0.00037 / −0.00037 |
| 65 – 80 | +9.5 | −9.5 | 80.0095 | 79.9905 | +0.0095 | −0.0095 | +0.00037 / −0.00037 |
| 80 – 100 | +11 | −11 | 100.011 | 99.989 | +0.0110 | −0.0110 | +0.00043 / −0.00043 |
| 100 – 120 | +11 | −11 | 120.011 | 119.989 | +0.0110 | −0.0110 | +0.00043 / −0.00043 |
| 120 – 140 | +12.5 | −12.5 | 140.0125 | 139.9875 | +0.0125 | −0.0125 | +0.00049 / −0.00049 |
| 140 – 160 | +12.5 | −12.5 | 160.0125 | 159.9875 | +0.0125 | −0.0125 | +0.00049 / −0.00049 |
| 160 – 180 | +12.5 | −12.5 | 180.0125 | 179.9875 | +0.0125 | −0.0125 | +0.00049 / −0.00049 |
| 180 – 200 | +14.5 | −14.5 | 200.0145 | 199.9855 | +0.0145 | −0.0145 | +0.00057 / −0.00057 |
| 200 – 225 | +14.5 | −14.5 | 225.0145 | 224.9855 | +0.0145 | −0.0145 | +0.00057 / −0.00057 |
| 225 – 250 | +14.5 | −14.5 | 250.0145 | 249.9855 | +0.0145 | −0.0145 | +0.00057 / −0.00057 |
| 250 – 280 | +16 | −16 | 280.016 | 279.984 | +0.0160 | −0.0160 | +0.00063 / −0.00063 |
| 280 – 315 | +16 | −16 | 315.016 | 314.984 | +0.0160 | −0.0160 | +0.00063 / −0.00063 |
| 315 – 355 | +18 | −18 | 355.018 | 354.982 | +0.0180 | −0.0180 | +0.00071 / −0.00071 |
| 355 – 400 | +18 | −18 | 400.018 | 399.982 | +0.0180 | −0.0180 | +0.00071 / −0.00071 |
| 400 – 450 | +20 | −20 | 450.020 | 449.980 | +0.0200 | −0.0200 | +0.00079 / −0.00079 |
| 450 – 500 | +20 | −20 | 500.020 | 499.980 | +0.0200 | −0.0200 | +0.00079 / −0.00079 |
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 JS6
JS6 denotes a hole tolerance zone with symmetric ±IT/2 deviation in the ISO 286 system.
At Ø25 mm JS6 is +0.0065 / −0.0065 mm, i.e. 24.9935 to 25.0065 mm.
How the limits are calculated
JS6 uses grade IT6 (a standard tolerance of 13 µm at 18–30 mm). Fundamental deviation: ±IT6/2: the tolerance zone is centred on the nominal size. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.