×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Composite Profile on Revolved Surface

Composite Profile on Revolved Surface

RE: Composite Profile on Revolved Surface

It comes down to what number you want to have control the orientation vs. the location. (In both proposals the size is controlled by the tighter .028.)
Thinking about location -- Proposal 1 locates the part around datum B within 0.1, while Proposal 2 also locates it within 0.1 (although only at point B).
Thinking about orientation -- Proposal 1 controls it within .028, while Proposal 2 does not; in fact the orientation is somewhat up for grabs in Proposal 2 because the position tolerance doesn't carry down onto the curve.

So my initial thinking is to go with Proposal 1. (An aside: to designate a tolerance between points A and B, you don't need the "PT" but just the letter. Also, in Proposal 2 you don't need the word "boundary" under the profile callout because profile is always a boundary idea.)

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

RE: Composite Profile on Revolved Surface

(OP)
Thanks. Unless I hear (or see) otherwise, Proposal 1 is on the print.

I was familiar with the point about "PT". Is "boundary" being dropped for 2009?

RE: Composite Profile on Revolved Surface

No -- boundary was only a word to be used with the position symbol. Profile tolerances by definition are always a boundary thing, not an axial thing.

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

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources