ISO Tolerance Table
ISO Tolerances For Fasteners | ISO Tolerance Chart | ISO & Metric Standards | ISO Steel Pipe Tube and Fittings Standard | ISO 2768 | ISO 8062 BS6615 Casting Tolerance Standard | Rough Casting Tolerance
Over |
Inc |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
1mm |
3mm |
0.009 |
0.014 |
0.025 |
0.040 |
0.06 |
0.09 |
0.14 |
3mm |
6 mm |
0.012 |
0.018 |
0.030 |
0.048 |
0.07 |
0.12 |
0.18 |
6mm |
10 mm |
0.015 |
0.022 |
0.036 |
0.058 |
0.09 |
0.15 |
0.22 |
10mm |
18mm |
0.018 |
0.027 |
0.043 |
0.070 |
0.11 |
0.18 |
0.27 |
18mm |
30mm |
0.021 |
0.033 |
0.052 |
0.084 |
0.13 |
0.21 |
0.33 |
30mm |
50mm |
0.025 |
0.039 |
0.062 |
0.100 |
0.16 |
0.25 |
0.39 |
50mm |
80mm |
0.030 |
0.046 |
0.074 |
0.120 |
0.19 |
0.30 |
0.46 |
80mm |
120mm |
0.035 |
0.054 |
0.087 |
0.140 |
0.22 |
0.35 |
0.54 |
120mm |
180mm |
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0.063 |
0.100 |
0.160 |
0.25 |
0.40 |
0.63 |
180mm |
250mm |
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0.185 |
0.29 |
0.46 |
0.72 |
250mm |
315mm |
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0.32 |
0.52 |
0.81 |
315mm |
400mm |
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0.36 |
0.57 |
0.89 |
400mm |
500mm |
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0.40 |
0.63 |
0.97 |
500mm |
-- |
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0.44 |
0.70 |
1.10 |
h (minus), j (plus/minus), k (plus)
Example – 90mm Ø h10 = +0/-0.140, j10 = +0.07/-0.07, k10 = +0.140/-0
Machining Process associated with ISO IT Tolerance Grade
IT Grade |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
Lapping |
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Honing |
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Superfinishing |
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Cylinderical grinding |
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Diamond turning |
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Plan grinding |
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Broaching |
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Reaming |
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Boring, Turning |
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Sawing |
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Milling |
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Planing, Shaping |
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Extruding |
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Cold Rolling, Drawing |
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Drilling |
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Die Casting |
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Forging |
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Sand Casting |
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Hot rolling, Flame cutting |
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