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
  • Symbol on the print is a single arrow.

    We actually indicated a part this morning still in the machine. The feature that reports out of tolerance runout indicated to about 0.0005" on the indicator. I asked the machinist to move the indicator to the large cylinder since that is the datum and it measured about 0.004" on the indicator on the end to the large cylinder. I asked him to move the indicator to the other end of the large cylinder is it measured about 0.003" on the indicator.

    The machine has the tail stock engaged and I think its moving the part when it engages.
Reply
  • Symbol on the print is a single arrow.

    We actually indicated a part this morning still in the machine. The feature that reports out of tolerance runout indicated to about 0.0005" on the indicator. I asked the machinist to move the indicator to the large cylinder since that is the datum and it measured about 0.004" on the indicator on the end to the large cylinder. I asked him to move the indicator to the other end of the large cylinder is it measured about 0.003" on the indicator.

    The machine has the tail stock engaged and I think its moving the part when it engages.
Children
No Data