Fig B Coaxial Features

Tables A5 and A14 of ANSI B4.2 show the following.

(a) For basic sizes 20 and 10,

Fundamental Deviation H = 0

Fundamental Deviation d - -0.065

Fundamental Deviation d = -0.040

These deviations must be applied to the basic size to obtain the MMC limits.

Note that the above calculated values can be found directly in Table 2 of ANSI B4.2 since the requirements for this example are preferred sizes and Fits. These MMC values are inserted in the formula as before:

7, «■ T2 = (20 ♦ 10) - (19.935 + 9.960) = 0.105

= 0.1 rounded downward

This total available tolerance may be divided in any desired manner, such as r, = 0.06 r2 » 0.04

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