Correct dimensioning for symmetrical parts

Hi all,

We have an in-house drafting standard for dimensioning features that are symmetrical about a center line. The standard was developed in our AutoCAD days, and is difficult to apply in the new world of SolidWorks drawings.

I've been trying to determine a better way to do it, preferably something in line with drafting standards like Y15.5M.

Would some of you drawing gurus mind looking at the two page PDF I've created and offering some feedback? The file is at:

formatting link
Thanks.

Reply to
Ant.
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In your AutoCAD days did you have a lisp routine that did this?

It would be good for your company to get a copy of the Y14.5M standard. That is definately not a standard way of denoting symmetry.

If you loose the standards battle, all of those dimensions can be updated with one edit. In SolidWorks, just Ctrl Select all the dims you wish to add the equals sign to and add the equal sign in front of and behind the . It is pretty easy. You do not have to edit each dimension separately.

The standard text you have for a note can be saved in your Design Library. You do not need to re-type it each time you wish to add it to a drawing.

Regards,

Anna Wood

Ant. wrote:

Reply to
Anna Wood

Here is the section from 14.5 detailing how to show symmetry. Although it seems to pertain more to partial views.

1.8.8 Symmetrical Outlines. Symmetrical outlines may be dimensioned on one side of the center line of symmetry. Such is the case where, due to the size of the part or space limitations, only part of the outline can be conveniently shown. See Fig. 1-33. One-half the outline of the symmehical shape is shown and symmetry is indicated by applying symbols for part symmetry to the center line. See ASME Y14.2M . and from y14.2M

2.7 Symmetry Line Symmetry lines are used as an axis of symmetry for a partial view. The line of symmetry is identified by two short parallel lines drawn at right angles through a center line near each end (see Fig. 1). Symmetry lines are used when representing partially drawn views and partial sections of symmetrical parts (see Fig. 3). Symmetrical view visible and hidden lines may extend past the center line if clarity would be improved.

Reply to
Steve Reinisch

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