Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

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

Drawing practice

Status
Not open for further replies.

Patrick618

Mechanical
Dec 12, 2008
6
US
I have a round machined part which has 2 features that were drawn 90° apart but had no relationship or tolerance noted. One was a milled flat and the other a drilled hole. We have made many similar parts over the years and always assumed there was no relationship since none was noted and never had a problem. On this part however our customer has rejected parts because we did not hold the 90° as drawn. My question is "is there a standard which clarifies this situation"?
 
Replies continue below

Recommended for you

Yes, there is.

ASME Y14.5M-1994 1.4 Fundamental Rules
(i) A 90deg angle applies where ... lines depicting features are shown on a drawing at right angles and no angle is specified.
 
This assumes that ASME Y14.5M was specified on the drawing.
 
Patrick, are you actually working to ISO standards, as this is the Iso forum.

I can't remember if it has equivalent wording to the ASME spec in one of it's many documents.

In ASME the assumed 90° invokes whatever the general angular tolerance is, or if applicable (such as on the outline of a square part) the general size tolerance.

KENAT,

Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top