Maximum material condition applied to squareness

Figure 22.5 shows a typical drawing instruction where limits of size are applied to a pin, and in addition a squareness tolerance of 0.3 is applicable at the maximum material condition.

!

0 30.0

_L 0 0.3 @ X

1

Figure 22.6 shows the condition where the pin is finished at the maximum material condition with the maximum squareness error of 0.3. The effective assembly diameter will be the sum of the upper limit of size and the squareness error. The squareness error will be contained within a cylindrical tolerance zone of 0 0.3.

Effective assembly diameter

Figure 22.6 shows the condition where the pin is finished at the maximum material condition with the maximum squareness error of 0.3. The effective assembly diameter will be the sum of the upper limit of size and the squareness error. The squareness error will be contained within a cylindrical tolerance zone of 0 0.3.

Squareness error contained within the cylindrical tolerance zone

Datum face X f X

Squareness error contained within the cylindrical tolerance zone

Datum face X f X

To provide the same assembly diameter of 30.9, as shown in Fig. 22.7, when the pin is finished at its low limit of size of 30.0, it follows that the squareness error could increase from 0.3 to 0.9. This permitted increase should be checked for acceptability.

Squareness error contained within the cylindrical tolerance zone

Datum face X

Squareness error contained within the cylindrical tolerance zone

Datum face X

Effective assembly diameter

Effective assembly diameter

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Responses

  • YOLANDA TOOK-TOOK
    What is maximum material condition?
    9 years ago
  • Cameron
    How to show squareness on drawing?
    8 years ago

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