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Which of the following grade is never used for fits?

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in Engineering Metrology by (829k points)
Which of the following grade is never used for fits?

(a) H10

(b) H11

(c) H8

(d) H9

The question was asked during an interview.

The question is from Guide for Selection of Fits topic in chapter Limits, Fits and Gauges of Engineering Metrology

1 Answer

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Best answer
Correct answer is (b) H11

To explain I would say: H5, H6, H7, H8, H9, H10, H11 these are the hole grades. H10 is not used for diameter fits. It can be used for milled widths. H11 is never used for fits because this grade is very coarse. H11 is useful only for coarse punched holes or drilled holes.

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