Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Meaning of this symbol 1

Status
Not open for further replies.
newreynolds

newreynolds

Mechanical
Dec 20, 2010
16
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.



 
Replies continue below

Recommended for you

Sort by date Sort by votes
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
 
Upvote 0 Downvote
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
 
Upvote 0 Downvote
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
 
Upvote 0 Downvote
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
Follow me on Twitter
 
Upvote 0 Downvote
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.
 
Upvote 0 Downvote
No, this is the correct forum for stupid nonstandard use of standard markings on drawings.


Mike Halloran
Pembroke Pines, FL, USA
 
Upvote 0 Downvote
Then what is the standard marking for this notion of a "major characteristic"?

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
 
Upvote 0 Downvote
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
 
Upvote 0 Downvote
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 (probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​
 
Upvote 0 Downvote
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
 
Upvote 0 Downvote
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

[jester]
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

FrancoisY
  • Question
What is this symbol? 2
Replies
9
Views
238
Wuzhee
Wuzhee
R.Billings
  • Locked
  • Question
Identify a Drawing Symbol 1
Replies
4
Views
130
R.Billings
R.Billings
nik007
  • Locked
  • Question
Significance of the symbol 1
Replies
13
Views
188
pmarc
pmarc
nik007
  • Locked
  • Question
Correctness of the gd&t symbol 2
Replies
3
Views
51
flash3780
flash3780
kokerkov
  • Locked
  • Question
I am not sure what this 'deviation table' means. 1
Replies
4
Views
58
kokerkov
kokerkov

Part and Inventory Search

Sponsor

Back
Top Bottom