All around symbol callout
All around symbol callout
(OP)
The all around symbol is a circle placed on the bend of the leader line of a profile control; this symbol indicates that the profile tolerance zone applies all around in the view on which it is shown.
This is what I know of the all around symbol application, but recently I noticed it was used to indicate the root radius all around on a shank as shown on the attached dwg, I am wondering is it the right way on the all around symbol application ?
Thanks
SeasonLee
This is what I know of the all around symbol application, but recently I noticed it was used to indicate the root radius all around on a shank as shown on the attached dwg, I am wondering is it the right way on the all around symbol application ?
Thanks
SeasonLee





RE: All around symbol callout
Here's a link in this forum where it was talked about http://www.eng-tips.com/viewthread.cfm?qid=245652.
To sum the thread up. The all around symbol is meant for GD&T only. It is not a drafting standard per say. Lots of CAD system does not have a option to put that symbol on unless it GD&T
Solid Edge V20
RE: All around symbol callout
Dave D.
www.qmsi.ca
RE: All around symbol callout
HOWEVER, the use of the all around symbol in the example you provided is redundant and completely unnecessary. This is because the radius callout itself is enough to specify the desired results.
Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group
RE: All around symbol callout
Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group
RE: All around symbol callout
As pointed out, the use outlined in the OP is inappropriate by drafting conventions which indicate that the radius is continuous unless specifically indicated otherwise.
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: All around symbol callout
Adding an all-around symbol here, in addition to not following the standard when used in this manner, provides no information: If you delete it, the junction shown is one between a cylinder and a perpendicular flat surface -- that's a fillet, and the fillet radius is shown.
It appears to me that the Y14.5 all around symbol was originally borrowed from AWS 2.4 for welding. But it is in practiced used a little different. Without having the requirement that the all around symbol operate in the current view, significant drawing ambiguities would likely result in complex part drawings. With welds, you're only concerned with a weld joints and the number of permutations is hence smaller, so you can get away with being less specific.