×
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

Cylindricity Inspection

Cylindricity Inspection

RE: Cylindricity Inspection

It should be inspected with a computer-probe type of device, such as a roundness machine (or maybe some CMMs can do it). Assuming this is based on ASME Y14.5, the default algorithm to use is the "minimum radial separation." For this reason, it can't be done very well with traditional open-setup methods.

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

RE: Cylindricity Inspection

(OP)
Tolerance zone of 0.25 is formed on the taper surface? If Cylindricity tolerance zone is horizontal when it is placed at the dia 25.4 than other end of dia 24.6 will not be on tolerance zone.

RE: Cylindricity Inspection

The part that is tapered in that way will fail cylindricity, yes. (Your question appeared to be how it is to be inspected; thus my reply.)

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

RE: Cylindricity Inspection

(OP)
so only size tolerance is accepted and Cylindricity is failed. Is this same case in Flatness and straightness also when part produced in worst condition?

RE: Cylindricity Inspection

Yes, form of a surface (flatness, straightness, cylindricity, and circularity) is independent of size. Size is simply size, and form looks for consistency along the size.

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

RE: Cylindricity Inspection

ashivu123
Typical form deviations for a cylindrical surface are straightness, lobing, ovality and taper, so a cylindricity tolerance will limits the straightness, roundness and taper of a diameter, it will not control the flatness on this case.

Season

RE: Cylindricity Inspection

The picture on the left is not a cylindricity tolerance, because it tapers down (going from left to right). It looks to be only controlling straightness.

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

RE: Cylindricity Inspection

(OP)
So the Fig. 2 is the cylindricity tolerance?

RE: Cylindricity Inspection

Yes, from what I can tell.

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

RE: Cylindricity Inspection

(OP)
Thanks

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