Meaning of this symbol 1

[newreynolds]

The symbol is a material condition with a circle with a cap pointing to the right. I uploaded a picture of what I'm talking about.

I'm just wondering if it has some other meaning than the particular material condition.

Thanks.

 

[ctopher]

I personally have never seen that symbol

Chris
SolidWorks 10 SP4.0
ctopher's home
SolidWorks Legion

 

[DeanD3W]

If there was a horizontal line dividing the cicle and "M" was instead maybe "M1" and if the "cap" looked more like a "bird beak" as in the movable datum target symbol that Y14.8 included in 1996 and which is now in Y14.5-2009 (figures 4-47 & 4-49, then maybe it was intended to be one of those... That's a lot of "ifs" though .

Otherwise it doesn't look like any symbol from Y14 standards that I'm aware of.

Dean

http://www.d3w-engineering.com

 

[TED7]

Could be something to do with Most Material Condition, the symbol for that is a M in a circle. Maybe this one is just with some kind of arrow?

Will Walters
Sheffield UK
Designer of machine tools - user of modified screws

 

[TED7]

Ignore the previous post reiterating the OP and pointing out the obvious. I must have skimmed the text even more briskly than I thought.

Will Walters
Sheffield UK
Designer of machine tools - user of modified screws

 

[PeterStock]

One more person who has never seen that symbol. If the symbol is on a customer's or vendor's print, you should ask what it means.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services

http://www.infotechpr.net

http://www.linkedin.com/profile/view?id=30064526&trk=tab_pro

 

[fcsuper]

My view on custom symbols is that they need to be explained on the drawing itself, or in a document that is referenced by the drawing. Is there an international standard or a custom standard that is listed on the print somewhere? If so, check that standand for an explanation. As far as I know, this symbol is not used by ISO or ASME. There could be a DIN explanation for it, but I have no access to that.
If all that fails, then ask the drawing originator to provide their official definition for the symbol.

Matt Lorono, CSWP
Lorono's SolidWorks Resources & SolidWorks Legion
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[newreynolds]

Hey guys, the particular print I was looking at didn't have a title block so I didn't see our internal legend.

It is actually not a material condition. It is a production flag of sorts. The M is for Major Characteristic and the S version is for SPC.

I guess this is actually in the wrong forum then? My apologies.

 

[MikeHalloran]

No, this is the correct forum for stupid nonstandard use of standard markings on drawings.


Mike Halloran
Pembroke Pines, FL, USA

 

[Belanger]

Then what is the standard marking for this notion of a "major characteristic"?

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems

 

[MikeHalloran]

A circled M already has a standard meaning, and it has nothing to do with major characteristics, whatever they are.

As for minor characteristics and non-significant dimensions and such, I omit them from my drawings, so everything that _does_ appear on a drawing of mine is important. Apparently that's no longer standard everywhere.







Mike Halloran
Pembroke Pines, FL, USA

 

[KENAT]

Major characteristic can have a legitimate meaning with regards to areas/features requiring NDT etc. I can't recall the spec but there is one.

However, I do concur with Mike about non significant dimension etc. but that's been discussed numerous times elsewhere.

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[powerhound]

I find it strange that the two, dreamed up symbols are a circle S and a circle M, yet they mean something other than MMC and RFS. Sounds like someone found a cool font and thought it would be neat to use some of the symbols in it to invent an obscure shop standard.

Powerhound, GDTP T-0419
Engineering Technician
Inventor 2010
Mastercam X4
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II

 

[ctopher]

Marketing/Purchasing must be involved.

Chris
SolidWorks 10 SP4.0
ctopher's home
SolidWorks Legion

 

[fcsuper]

This is kind of related to the topic I brought up a while ago: thread1103-290024.

Matt Lorono, CSWP
Lorono's SolidWorks Resources & SolidWorks Legion
Follow me on Twitter

 

[fcsuper]

I also brought this up to the ASME guys in their Yahoo Group. I recommend checking out the conversation there:

http://tech.groups.yahoo.com/group/Y14-5_User_Group/message/3758

Matt Lorono, CSWP
Lorono's SolidWorks Resources & SolidWorks Legion
Follow me on Twitter

 

[mjcole]

I was going to say Maximum Material CONE-dition given the 3D conical shape look of the arc on the right side of symbol.

Michael