INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!

*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.

Jobs

Runout versus Ovality

Runout versus Ovality

(OP)
Hello all,
There is a difference of opinion when sitting on the same face of a part that you are checking either runout or ovality. While sitting on face A there is a probe on that same face A monitoring 360° movement. Some say Runout some say Ovality. What is the real answer?

Thank you all in advance for answers.

RE: Runout versus Ovality

You need to define how the surface you're measuring relates to the datam you've chosen to use. You also need to define which drawing/measurement standards you're using as different standards use different terminology.
Other terms to consider are perpendicularity, parallelism, out-of-round, concentricity, etc.

RE: Runout versus Ovality

I'd say you are measuring runout. Runout can be made up from different specific contributors like ovality.

RE: Runout versus Ovality

I don't believe the ASME Y14.5 GD&T standard describes an "ovality" characteristic. This condition would usually be toleranced with a cross section profile defined by basic dimensions, and a geometric profile tolerance callout referencing the basic profile.

RE: Runout versus Ovality

GregLocock-

Your post regarding ovality and harmonic analysis of radial profile shapes was helpful. I did some reading on the subject and learned that ovality describes a specific runout profile having 2 undulations (or lobes) per revolution (UPR). The harmonic characteristics of a runout profile, such as ovality, are often evidence of certain problems with the set-up/process used to manufacture a precision cylindrical part. Below is an interesting chart on the subject from this brochure:

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


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close