The video below is in response to a question that we received on our question line from Jeff. Jeff asked us if concentricity is always equal to half of the runout value. ASME Y14.5 defines concentricity as the requirement where the derived median points of all diametrically opposed elements must align with the axis of…
Category: Runout
by Seth Elder on September 14, 2020.
In this question line video, Brandon reviews the differences between the GD&T callouts for circularity, circular runout, and total runout. To examine the differences in these concepts it is helpful to first review the GD&T hierarchy of SLOF – Size, Location, Orientation, and Form. When defining a feature, begin by specifying the size of a…
by GD&T Basics on September 9, 2020.
Does Runout or Size Control the Circularity/Form Error in GD&T? (Answer: It Depends) In this article video, we aim to answer how Runout is used to control the form/shape/circularity/cylindricity on a cylinder. It also talks about when there is an exception to this due to Rule #1 of GD&T.
by GD&T Basics on December 16, 2014.
GD&T Symbol: Relative to Datum: Yes MMC or LMC applicable: No Drawing Callout: Description: Runout is how much one given reference feature or features vary with respect to another datum when the part is rotated 360° around the datum axis. It is essentially a control of a circular feature, and how much variation it has…
by GD&T Basics on December 13, 2014.
GD&T Symbol: Relative to Datum: Yes MMC or LMC applicable: No Drawing Callout: Description: Total Runout is how much one entire feature or surface varies with respect to a datum when the part is rotated 360° around the datum axis. Total runout controls both the amount of variation in the surface as the part is…