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Download Solution PDFExplanation:
Limits and fits comprise 18 grades of fundamental tolerances for both shaft and hole, designated as IT01, IT0 and IT1 to IT16.
These are called standard tolerances.
Grades of Tolerance: Grade is an indication of the level of accuracy.
|
IT grades |
Used for |
|
IT01 to IT4 |
For the production of gauges, plug gauges, measuring instruments |
|
IT5 to IT7 |
For fits in precision engineering applications |
|
IT8 to IT11 |
For General Engineering |
|
IT12 to IT14 |
For Sheet metal working or press working |
|
IT15 to IT16 |
For processes like casting, general cutting |
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