The SolidWorks Geek - Latest Comments in Standards Tuesday – Fundamental Rules of Dimensioning

Re: Standards Tuesday – Fundamental Rules of Dimensioning

pk24 — Mon, 19 Oct 2009 06:18:45 -0000

wow. I have been looking for this for a long long time! You make it look so simple!

Re: Standards Tuesday – Fundamental Rules of Dimensioning

lemonade diet — Sun, 04 Oct 2009 04:09:33 -0000

please sent me a pdf formate of this rules. i will wait for you in every seconds

Re: Standards Tuesday – Fundamental Rules of Dimensioning

odelle — Fri, 25 Sep 2009 09:29:04 -0000

Tolerancing specifications define the allowable variation for the form and possibly the size of individual features, and the allowable variation in orientation and location between features.
masini de inchiriat

Re: Standards Tuesday – Fundamental Rules of Dimensioning

abdulsamad vc — Sat, 17 Jan 2009 09:37:10 -0000

please sent me a pdf formate of this rules. i will wait for you in every seconds

Re: Standards Tuesday – Fundamental Rules of Dimensioning

dadstillsurfs — Fri, 10 Oct 2008 16:57:40 -0000

Marvelous beginning on Dimensioning practices. I thought I was the only Designer that applied these standards and principles on a regular basis.
I do think you've overlooked one very important concept; features must be dimensioned in the view that they are in true shape, eg. profile of a tab vs the end view which does not describe the feature's shape. Don't know how many times I've called a supplier to ask a question like "Does XXX dimension refer to the valve or to the housing?"

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Alex R. Ruiz — Tue, 16 Sep 2008 11:31:17 -0000

Good morning Randy,
Yes you are correct. When you specify a dimension as reference with parenthesis (or any other method) it means that the value shown is toleranced somewhere else on the print with an overall dimension or direct tolerance. Reference dimensions are just that; reference. Tolerances are never applied to a reference dimension.

If you or your fellow engineers have a question, feel free to ask :)

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Randy Paap — Tue, 16 Sep 2008 11:19:13 -0000

I have used GD&T, based on the ANSI Y14.5M-1982 and 1994, from a Quality stand point previously as a CMM programmer. It always seemed simple to understand without any grey area. I wish I could convince more engineers to apply it. I have a question in regards to 'reference dimension'. It has always been my understanding that when an engineer puts parentheses around a dimension, that dimension was considered a reference and not subject to tolerance. Is this a correct interpretation? I seem to have this argument a lot with fellow workers and engineers the like.
Thanks
Randy

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Alex R. Ruiz — Wed, 27 Aug 2008 19:16:11 -0000

<html><body><div><font face="verdana,geneva" color="#000000">Hi Chris,</font></div>
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<div>Of course, it all depends on your internal drawing standards. However, if you tried to dimension all the right angles in your drawing, it could get pretty cluttered. If you feel like it needs better clarification, you can always add a general note or something in the title block that states the implied 90Â° rule. But if your title block refers to ANSI Y14.5 or ASME Y14.5, it is a bit redundant.
</div>
<div><font face="verdana,geneva" color="#000000"></font>
</div>

-------- Original Message --------
Subject: [theswgeek] Re: Standards Tuesday - Fundamental Rules of
Dimensioning
From: "Disqus" <>
Date: Wed, August 27, 2008 3:57 pm
To: blog@theswgeek.com

chris <cbalduc@hotmail.com> (unregistered) wrote:

"An angle of 90Â° is implied when two lines are perpendicular making a right angle that is not dimensioned."

Since many people may not be familiar with this rule, it would be better to play it safe and include the dim.

Link: http://www.theswgeek.com/2008/06/17/standards-tuesday-fundamental-rules-of-dimensioning/#comment-1879603

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Re: Standards Tuesday – Fundamental Rules of Dimensioning

chris — Wed, 27 Aug 2008 18:56:35 -0000

"An angle of 90° is implied when two lines are perpendicular making a right angle that is not dimensioned."

Since many people may not be familiar with this rule, it would be better to play it safe and include the dim.

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Gary Skinner — Sun, 29 Jun 2008 12:51:49 -0000

Hi Alex, Thank you. You've answered my questions very well. Sincerely, Gary Skinner

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Alex Ruiz — Thu, 26 Jun 2008 00:53:23 -0000

Hi Gary, Wow, Mr. Ruiz sounds so formal. Alex is fine, we are pretty informal here. :) Let me see if I can answer your questions: First, Rule #9: As I am sure you know ,different temperatures effect each material differently. In some extreme cases, only a few degrees can effect the measured dimension of a part. This can be disastrous in extremely precise components and assemblies. To maintain dimensional consistency of parts the ambient temperature should be controlled when performing inspections. If the dimensions on the drawing are to be applied at any temperature other then 68° it should be noted on the drawing. Next, Rule #10: "Free state condition" basically refers to the state of the part being inspected when at rest minus any outside forces applied to the part during the manufacturing process. One possible example of this is a spring. Depending on how it is manufactured, when you take the spring from the machine and set it on a table it may be of a different shape then when it was being manufactured. Well Gary, I hope that answered your question and keep them coming!

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Gary Skinner — Wed, 25 Jun 2008 22:53:36 -0000

Mr. Ruiz, Thank you for sharing your knowledge, I don't understand number 9 or 10; please explain. Thank you. Sincerely, Gary Skinner

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Alex Ruiz — Wed, 18 Jun 2008 12:36:21 -0000

Josh,

ASME standards are tolerable if taken in small doses. Much like my sense of humor.

Re: Standards Tuesday – Fundamental Rules of Dimensioning

Josh — Tue, 17 Jun 2008 08:45:21 -0000

man, i really like this post. good quick points. easy to print out and pass out. very nice man.