standard call out for controlling Slot feature as per ISO and ASME

[Dimensionalstuff]

Hello ,
I want to know the standard which I can use for controlling the slot feature as per both ASME and ISO
and which one is effective and more logical?
Please help me out guys.....

 

[CheckerHater]

I will risk appearing rude, but I’d like to remind you of some rules.

According to posting policies
“…members are expected to:
Search Google, Previous Posts, and FAQs Prior to Posting.”

The matter or slot dimensioning was addressed many times before; check the following links for example:

http://eng-tips.com/viewthread.cfm?qid=128295

http://www.eng-tips.com/viewthread.cfm?qid=43664

http://www.eng-tips.com/viewthread.cfm?qid=353843

http://www.eng-tips.com/viewthread.cfm?qid=365099

If you still didn’t find anything useful and believe your case requires special consideration, please clarify the following:

What exactly do you mean by “slot”? What appears like an obround slot on the drawing may represent loosely toleranced clearance feature, or precise keyway, or something else.
Depending on the actual function of your “slot-like" feature the best way to proceed could be different

 

[Dimensionalstuff]

Yes...I went through these posts ...but my query is for standard..one need to follow as per ASME and ISO
what is their difference and which is more logical....in terms of geometricaal control.
Everyone following different methods for controlling the slot feature position and size,so I want to make standard atleast in our firm.
So,each drawing will follow the same practice.
I attached one drawing showing slot call-out,but I need standard...so that I can explain to anyone..from where it come from.means ASME or ISO.
So..I need comparison and best way for defining slot

Thank you..for your quick support..really nice

 

[CheckerHater]

That's the problem: there is no "slot standard".

Look at the enclosed picture. All 3 way to dimension the slot are legal, although the one in the middle sometimes is recommended for slots punched in sheet metal. You chose the one that works for you.

The scheme chosen for position tolerance is legal as well. It appears that slot is allowed to translate wrt datum C, but since datums are not shown, it's hard to tell how the workings of your part are affected. Once again - it's your choise.

And the last one: you do not change from using ASME standard to using ISO standard at the drop of a hat. You are the one to make that decision before you ever draw the very first line. So you tell us if ISO or ASME standard is in use, so we could find the better solution.

 

[Dimensionalstuff]

Thank you for your response

As I mentioned I need ISO and ASME standard comparison for slot call out.Is there any standard I would get for the same?
And in previous post I attached drawing in it they have made Datum 'C' to the ''slot width'' and they controlling slot length WRT Datum 'C' as well.
So,I need best practice...for defining slot as per GD&T,not just dimension wise.
In your previous answer you have shown me how to give dimension to slot in 3 diff. way.But I need some proof from standard basically as per GD&T.so I can show if anyone raise query...from where you have taken these or considered thes method or style.That's why I needed these.I need some proof
I hope you are getting my query.
Thank you

 

[CheckerHater]

Once again, there is no specialized "slot standard".

ASME standard dealing with dimensioning and tolerancing is Y14.5, the most recent version is 2009. If you can find 1994 version it has many similarities.

ISO standard dealing with geometrical tolerancing is 1101, the most recent version is 2012. If you can find 2005 version it has many similarities.

ISO standard dealing with positional tolerancing in particular is 5458.

And guess what? I am not supposed to do your homework for you

 

[Dimensionalstuff]

hahahah.. Not a home work sir
I searched alot for these..but not getting satisfactory solution.
and I know the ASME Y14.5 2009, 1994...but I do not know about ISO..and I am not getting any stuff for these.That's the reason..I am here
I had training for Y14.5 2009 standard.
But..thank you for your support.

 

[CheckerHater]

OK, the closest thing to what you are looking for is Fig. 7-34 in 2009 book which is the same as Fig. 5-47 in 1994 book (that's ASME)

Just like you I don't have a set of ISO books on hands. The best I can offer is something like the enclosed picture.

You also have to consider that you can use Profile to control your slot, both in ISO and ASME, sometimes Symmetry (more likely in ISO). There is no book out there that will tell you: "This is the best way to do slots".

So good luck!

 

[Dimensionalstuff]

Thank you ..sooO much sir..for your sincere efforts,I really appreciate your support.
And for having so much patience with me.

 

[KENAT]

To back up what CheckerHater says, for ASME Y14.5M-1994 I'd look at section 5.10.1 & associated figure 5-47.

For Iso? I don't remember it being stated as clearly in BS8888 for example but that's relying on 10+ year old memory so it may well be somewhere.

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