How to Annotate Holes Passing Through One Surface of a Part
How to Annotate Holes Passing Through One Surface of a Part
(OP)
Hi All,
This one might seem obvious, but I'm not a drafting expert.
I have a part with a square tube, that holes are drilled into. The holes go all the way through the "top" layer of the tube, but not through the "bottom" layer. What is the best way to indicate this on the drawing? Do I use the word THRU?
This one might seem obvious, but I'm not a drafting expert.
I have a part with a square tube, that holes are drilled into. The holes go all the way through the "top" layer of the tube, but not through the "bottom" layer. What is the best way to indicate this on the drawing? Do I use the word THRU?
Evan Janeshewski
Axymetrix Quality Engineering Inc.
www.axymetrix.ca





RE: How to Annotate Holes Passing Through One Surface of a Part
Typically THRU means thru everything, both near and far side.
John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: How to Annotate Holes Passing Through One Surface of a Part
All this thru next, thru one wall... terminology can occasionally be misunderstood - especially if there are any language issues between drafter, vendor & inspection...
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: How to Annotate Holes Passing Through One Surface of a Part
lightweight, cheap, strong... pick 2
RE: How to Annotate Holes Passing Through One Surface of a Part
Appairently SolidWorks thinks "thru" and "thru all" are different, too. I was shocked the first time I saw that as I thought like powerhound.
RE: How to Annotate Holes Passing Through One Surface of a Part
In today CAD systems it takes less time to create a section than to type in "NEAR SIDE ONLY".
Also as the hole goes thru second wall it becomes “2 HOLES”
This two techniques together will give bullet-proof hole designation, but also could be used separately.
Grumpy old drafter in me reminds that back in time we used to create a section thru every semi-important hole using only paper and pencil and no-one died.
RE: How to Annotate Holes Passing Through One Surface of a Part
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RE: How to Annotate Holes Passing Through One Surface of a Part
If we want it to go all the way thru, we just say "THRU" and use a composite positional tolerance.
RE: How to Annotate Holes Passing Through One Surface of a Part
Frank
RE: How to Annotate Holes Passing Through One Surface of a Part
lightweight, cheap, strong... pick 2
RE: How to Annotate Holes Passing Through One Surface of a Part
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: How to Annotate Holes Passing Through One Surface of a Part
Thanks for all the input. It seems that this is more of a best practice issue, as opposed to there being hard and fast rules.
The designer went with the NEAR SIDE ONLY annotation.
Evan Janeshewski
Axymetrix Quality Engineering Inc.
www.axymetrix.ca
RE: How to Annotate Holes Passing Through One Surface of a Part
Ref: ASME Y14.5-2009 1.8.10 Round Holes
Matt Lorono, CSWP
Product Definition Specialist, DS SolidWorks Corp
Personal sites:
Lorono's SolidWorks Resources & SolidWorks Legion
RE: How to Annotate Holes Passing Through One Surface of a Part
RE: How to Annotate Holes Passing Through One Surface of a Part
John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: How to Annotate Holes Passing Through One Surface of a Part
In the light of what is shown in fig. 7-5 from Y14.5-2009 your interpretation seems to be different than Y14.5's.
RE: How to Annotate Holes Passing Through One Surface of a Part
When hole drilled thru several walls becomes pattern and when it stills the one single hole?
RE: How to Annotate Holes Passing Through One Surface of a Part
RE: How to Annotate Holes Passing Through One Surface of a Part
Should <CF> be added to DIA 25.6/25.0 on Fig-7.5 it would be perfect by the word and the spirit.
Should it be added to the “shortcomings” list? For something 15 years in the making 2009 has a few “half-baked” discrepancies like that.
RE: How to Annotate Holes Passing Through One Surface of a Part
RE: How to Annotate Holes Passing Through One Surface of a Part
Would you have used "12X" in that case? I do think "BOTH SIDES" with the section as shown sets a bad example. Particularly, since they want to minimize text do to lanquage concerns.
Frank
RE: How to Annotate Holes Passing Through One Surface of a Part
That’s exactly the point. <CF> replaces “BOTH SIDES”
RE: How to Annotate Holes Passing Through One Surface of a Part
In my opinion THRU BOTH SIDES or any other notation is not needed at all in this case. Cross-sectional view makes everything pretty clear.
There is a geometric diffence between "6X" and <CF> on one hand and "12X" on the other, so my choice would depend functional needs.
RE: How to Annotate Holes Passing Through One Surface of a Part
If you say 12X do they have to clock only do to the simulaneous requirement, then, in your opinion?
Frank
RE: How to Annotate Holes Passing Through One Surface of a Part