WELCOME TO FENES SITE |
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Allowances for reaming of holes
| Worked material |
Dimension of allowances for range of
holes diameters (mm) |
| 3 ÷ 5 |
5 ÷ 10 |
10 ÷ 20 |
20 ÷ 30 |
ponad 30 |
Steel do 700 N/mm2
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0.1÷0.2
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0.2
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0.2÷0.3
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0.3÷0.4
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0.4÷0.5 |
Steel 700÷1100 N/mm2
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0.1÷0.2
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0.2
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0.2
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0.3
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0.3÷0.4 |
Cast steel
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0.1÷0.2 |
0.2
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0.2
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0.2÷0.3
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0.3÷0.4 |
Grey cast iron
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0.1÷0.2
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0.2
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0.2÷0.3
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0.3÷0.4
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0.4÷0.5 |
Melleable cast iron
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0.1÷0.2
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0.2
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0.3
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0.4
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0.5 |
Copper
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0.1÷0.2
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0.2÷0.3
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0.3÷0.4
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0.4÷0.5
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0.5 |
Brass, bronze
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0.1÷0.2
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0.2
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0.2÷0.3
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0.3
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0.3÷0.4 |
Light metals
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0.1÷0.2
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0.2÷0.3
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0.3÷0.4
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0.4÷0.5
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0.5 |
Hard plastics
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0.1÷0.2
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0.3
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0.4
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0.4÷0.5
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0.5 |
Soft plastics
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0.1÷0.2
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0.2
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0.2
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0.3
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0.3÷0.4 |
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