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Distinguished Contributor
jbelle7435
Posts: 228
Registered: ‎07-28-2005
Message 1 of 8 (236 Views)

Geometric Tol. question

236 Views, 7 Replies
09-24-2013 05:16 AM

Basic question but could lead me in the right direction from here...

 

I have a drawing(OLD) that says "Sides must be flat up to Diameter" Where te arrows are pointed are where the note was. From what I know can geometric tolerances be used instead of that note. If so I did some work seeing how to replicate it with that and this is what I did. Does that make sense and if maybe there are more resources out there to get me on my way if I run into more stuff like this.

Inventor 2012
*Expert Elite*
mcgyvr
Posts: 6,925
Registered: ‎12-01-2004
Message 2 of 8 (222 Views)

Re: Geometric Tol. question

09-24-2013 05:28 AM in reply to: jbelle7435

Be very careful with GD&T.. Trying to be "too fancy" can just raise the cost of your parts considerably. 

 

In my opinion its better to not use GD&T if you don't know exactly how it works.

 

google "gd&t"

 

 

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Distinguished Contributor
jbelle7435
Posts: 228
Registered: ‎07-28-2005
Message 3 of 8 (210 Views)

Re: Geometric Tol. question

09-24-2013 05:42 AM in reply to: mcgyvr

Thats like syaing don't get married when your married for 50 years :smileyhappy:. I worked at a few places but never was in a situation yet to use it round the clock ro even for a few minutes. I guess some companies love it and some don't and some don't even know. I probably was in the "Don't even know" category.

Inventor 2012
Distinguished Mentor
rdyson
Posts: 896
Registered: ‎04-11-2005
Message 4 of 8 (192 Views)

Re: Geometric Tol. question

09-24-2013 06:36 AM in reply to: jbelle7435

Not knowing design intent it's difficult to say. But a .000 tolerance is not realistic, I assume this was just for demonstration purposes.

Again, working from ignorance, I'd probably use flat for one side and parallel for the other.

*Expert Elite*
mrattray
Posts: 2,501
Registered: ‎09-13-2011
Message 5 of 8 (171 Views)

Re: Geometric Tol. question

09-24-2013 07:44 AM in reply to: jbelle7435
GD&T is all about expressing design intent. Without knowing what you want to say, how can we tell you how to say it?
Mike (not Matt) Rattray

Distinguished Contributor
jbelle7435
Posts: 228
Registered: ‎07-28-2005
Message 6 of 8 (162 Views)

Re: Geometric Tol. question

09-24-2013 07:57 AM in reply to: mrattray

"Sides must be flat up to Diameter" replaced with g.tol but with the info I got already its fine as is.

Inventor 2012
Distinguished Contributor
Mark.Downes
Posts: 120
Registered: ‎11-18-2010
Message 7 of 8 (152 Views)

Re: Geometric Tol. question

09-24-2013 08:21 AM in reply to: jbelle7435

Hi Jbelle7435,

 

As all above have correctly stated, the cost of your part could rocket if

GD&T is used unnecessary and it would be wrong to give you an answer

as to how tight your tolerance should be.

 

With that caveat mind, here is an example of how I would approach

a flatness tol on one side and a parallel tol on the other to tie them together.

 

Again this is only a suggested guild, your actual tol / price requirement may be very different.

 

Hope this is of help

 

Cheers

Mark

Inventor 2013

 

Capture.JPG

Distinguished Contributor
jbelle7435
Posts: 228
Registered: ‎07-28-2005
Message 8 of 8 (142 Views)

Re: Geometric Tol. question

09-24-2013 08:32 AM in reply to: Mark.Downes

Thanks that is really nice and maybe what I even wanted except right now this is a new language that can't learn in 1 day and a shop floor would have to learn as well. I will def save this as a good example!

Inventor 2012
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