×
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 Positional Tolerances

Composite Positional Tolerances

Composite Positional Tolerances

(OP)
I have 4 linear counterbored holes with threads, for cam followers.

4X <DIA>.438 <DEEP>.480
7/16-20 UNF-2B THRU

Can I apply composite positional tolerancing to the entire callout, or do I have to apply to the counter bore and threads separately?

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?

RE: Composite Positional Tolerances

MadMango:

As per page 137 fig. 5-37 in the standard, you can apply a positonal tolerance on both the hole(s) and the counter bore(s) together. Make sure that the 4X hole size and then the counter bore size with depth are above the feature control frame.

In that same thought then, one may have a composite feature control frame covering both or one can separate them as per fig. 5-38.

Hope this helps.

Dave D.
www.qmsi.ca

RE: Composite Positional Tolerances

(OP)
Thank you for the verification, I just needed a sanity check.  I will probably apply to both (fig 5-38) as the counter bore for the cam follower shafts are important.

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?

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