hexagon logo

Runout - Axial vs Radial

I have a part that is constantly out of tolerance on radial runout. My datum is a cylinder and my runout feature is a circle. When I change runout from from radial to axial, it’s now within tolerance.

I looked up radial runout and axial runout and the difference is radial is how far off a feature is off the datum axis but still parallel and axial is how much of a tilt the feature has to the datum axis. Which one should I use and why and I out of tolerance with only one and not both?


https://www.celeramotion.com/applimotion/support/faqs/what-are-radial-and-axial-runout-error/#:~:text=Radial%20runout%20is%20when%20the,parallel%20to%20the%20main%20axis.
Parents

  • mathematically, you should have the entire datum surface measured and then as much of the evaluation surface as you can. Only measuring .100 of a 3 inch long diameter will not yield correct or repeatable results Disappointed

    I would definitely look into using larger hardware if you need to keep this on the CMM or just do it on the surface plate

    The example of shared with you, the result you would report is .0008 because its the distance between the lowest & the highest point of the “worst” analyzed cross section




Reply

  • mathematically, you should have the entire datum surface measured and then as much of the evaluation surface as you can. Only measuring .100 of a 3 inch long diameter will not yield correct or repeatable results Disappointed

    I would definitely look into using larger hardware if you need to keep this on the CMM or just do it on the surface plate

    The example of shared with you, the result you would report is .0008 because its the distance between the lowest & the highest point of the “worst” analyzed cross section




Children
No Data