Maximum material condition applied to position

A typical drawing instruction is given in Fig. 22.8, and the following illustrations show the various extreme dimensions which can possibly arise.

12.1

2 Holes 0 12.0

r-

~c

5---(

Minimum distance between hole centres and the maximum material condition of holes.

81.8

69.8

*

k ■ *

0 12

Condition B (Fig. 22.10)

Maximum distance between hole centres and maximum material condition of holes

70.2

58.2

N

\ /

H

0 12

Fig. 22.10

Condition C (Fig. 22.11)

To give the same assembly condition as in A, the minimum distance between hole centres is reduced when the holes are finished away from the maximum material condition.

81.8

69.8

Fig. 22.11

Condition D (Fig. 22.12)

To give the same assembly condition as in B, the maximum distance between hole centres is increased when the holes are finished away from the maximum material condition.

Note that the total tolerance zone is 0.2 + 0.1 = 0.3, and therefore the positional tolerance can be increased where the two holes have a finished size away from the maximum material condition.

70.3

58.2

-e

\ /

0 121

Fig. 22.12

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Responses

  • Roma
    What is the maximum material condition in engineering drawing?
    8 years ago
  • eerik
    Can you apply a maximum material condition to a conventional position?
    8 months ago

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