#ISO 2768 HOLE TOLERANCES ISO#

The grey circle shows the diameter 16 of the bolt mounted in the hole. The dash double dot lines show the maximum permitted position deviation of the hole with diameter 17,5 in one direction.

Using this method, we can increase the permissible deviation under realistic conditions without changing the function and produce the component more cost-effectively, because we are allowing a wider deviation. When we circle the rectangle, we get a round tolerance zone with a diameter of 1.2 mm (blue circle). If we assume that a round screw will be placed in the round hole, does a rectangular tolerance zone really make sense? Or would a round tolerance zone be better? The tolerance zone resulting from the deviation in Figure 2 (Detail Z) is the cyan rectangle in Figure 3. What does this mean for the allowed deviation of the holes? For each dimension we have a different tolerance.

#ISO 2768 HOLE TOLERANCES ISO#

Let in Figure 2 assume that the general tolerances according to ISO 2768-m apply to the dimensions. This is a typical example of what you may find in a number of companies.

LetвЂ™s have a look at this simple plate with six holes in Figure 1 and see how they are dimensioned. Why should I use GD&T to detail simple parts?Дo you want to make sure that your part always fits the counterpart? Do you want to reduce production costs? Do you want to map complex relationships in one part? This article looks into the subject of GD&T and why utilising this capability enables greater control of dimension hole patterns. Learn with this article why positioning tolerances are the better way of dimensioning hole patterns.

Iso 2768 hole tolerances