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((Tolerances and Fits 1

:

.

:

G.M. Maitra and L.V. Prasad, Handbook of Mechanical Design, Tata

McGraw-Hill, New Delhi, India, 1985.

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2

(tolerance grades):

((i

((grades

.

DDismicrometer 001.045.0)(UnitToleranceStandard 3 +=

mean)lgeometricaThe:sizesstep(For the)(DiameterNominal: mmD

:

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((Grades 3

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((Fundamental Deviation 4

)

(

.

.((a-z

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5

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6

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((Fits7

:

:

:((shaft-basis-

(h)

:((hole-basis-

((H

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((Fits 8

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- 9

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