×
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

Dimensioning a countersunk slot on a curved surface

Dimensioning a countersunk slot on a curved surface

Dimensioning a countersunk slot on a curved surface

(OP)
I have a cylindrical part with a radial screw hole pattern for flat-head screws; the application requires that the screw holes be axial slots and I'm curious what the best practice is for dimensioning this feature. See the attached image for a better description. A chamfer dimension would not be correct as the chamfer length is longer at the ends of the slot due to the curvature of the surface.
Has anyone encountered this before?
-Kyle

RE: Dimensioning a countersunk slot on a curved surface

Man, that's ugly.

I'm sure you had good reason to do it, but do take note that if the screws don't end up at one end or the other of the slot, tightening them will coin the countersink faces because of the theoretical line contact. If the screws have to be loosened and retightened, it may not be possible to make small adjustments of location because of the brinelled impressions in the countersinks. ... but I'm sure you knew that, too.

I guess I'd dimension one such detail in a nominally normal view, as if it were an obround, then treat the remainder as an array of the dimensioned detail.

Mike Halloran
Pembroke Pines, FL, USA

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