So I have a heatsink block with tapped holes. The top and bottom and left and right sides, respectively, have symmetric hole spacing. How do I show/dimension/note the drawing properly so that I do not have to show all side views?
Your image doesn't show up because someone screwed up the forums with their new formatting.
So you may define a part with symmetry using this line, however ASME (if using this standards) has a line standard:
This may be used as a center line. This has to be manually created because SW doesn't feel it necessary to have a symmetric center line option to comply with standards. Unaddressed requests for YEARS.
You can also use the center line call-out on your part which indicates symmetry when dimensioned about it correctly.
Yeah, the site is very messed up at the moment. I understand what you are saying, but a centerline does not help when you cannot see the features. I have a hole on the right side view. I have a hole on the left side view. They are the same size and in the same placement. I only want to show one side view, let's say the right (3rd angle standard), and note on it in some way shape or form that the opposite side is the same. I am talking views, not the same view.
(blue arrows) one of these sides you can state 2X hole size callout (both sides or ends), locate them on one side also with the statement (both sides or ends).
Views with the red arrows may be deleted. (invert these at your discretion.)
I just wanted to be sure. I typically say "both sides", but then I had and engineer question me on it and I'll be honest, I was not sure if that was the proper way. I didn't want to clutter my drawing with more views just to show identical hole placement. I was just unclear on the proper labeling.
ok so the png now shows up
This part is not symmetric, as these holes appear to be different.
actually these holes are symmetric, but that was not the issue. I was just going to use ordinate dimensioning for that. My question was different. I meant between views. Please see above.
The highlighted holes are showing with thread on some and without thread on others. Therefore not symmetric.
What am I missing?
IF the part is truly symmetric than you can keep the previously shown blue arrowed views and add the line of symmetry or CL to the princ. view:
I've used the centerlines as noted above, but with an added note. The tapped holes are on each end of the part, so I call them out from one view and just note how many are on each end. I've had no issue with this, but my shop(s) also utilize the 3D file in addition to the print. (Not sure if this uses or breaks a standard, but it gets the job done for my parts)
If you can't see the other end, you have to define it somehow, Each End, Both Ends, Both Sides. As long as it's clear. If the top view is symm, then define it as such with a CL dimension everything per the datums or the line of symm.
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