show crosshairs even if not dimensioning to them?

[loughnane]

For example, I have a top view where I dimension the location of a thru hole. That view has crosshairs

Two projection views later I have a bottom view. I can now see the other end of the thru hole, but I am not dimensioning to it (to prevent overconstraint).

Is it correct to show the crosshairs on the bottom view as well? I feel it would just clutter up my drawing.

Chris Loughnane - Product Design

http://www.pdnotebook.com

http://www.twitter.com/_chrisloughnane

 

[lifttrucks]

I do not have the latest Y14.2 standard - I have the 1992. The standard I have does not specify WHERE center lines must be shown. It only specifies HOW center lines must be drawn.

To take your example to an extreme - we have assemblies with hundreds of holes in them. We omit center lines in these instances unless we are dimensioning to the axes. If we did not omit the center lines, the drawing would look like a spider's web.

I would let clarity dictate the use of center lines.

 

[fcsuper]

Centermarks aren't really in the ASME, I thought. Don't quote me on this.

Either way, I don't add centermarks unless there is a dimension to the hole because this makes it clear that there is no dim to that hole (missing or otherwise). They can also clutter the drawing if over used.

Matt Lorono, CSWP
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[loughnane]

Clarity really is the trump card.

Chris Loughnane - Product Design

http://www.pdnotebook.com

http://www.twitter.com/_chrisloughnane

 

[powerhound]

I agree with the rest. I only put center marks when dimensioning to them.

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[KENAT]

I don't necessarily limit myself to when dimensioning to them.

I basically inconsistently add them when I feel it adds clarity/improves the drawing.

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