Answer / karthick

in circularity the distance from the origin in all the
direction remains same whereas in ovality it differs

Answer / sachin patil

Ovality and Circularity are different, both are not the
same. Component that has circularity issue does not
necessarily have Ovality issue. Circularity is related to
the form of the circle in question , and ovality is related
to the difference in the diameters of the circle measured
at different positions . Circle having Ovality issues will
definately have Circularity issue , but not necessarily
component having Circularity issue has and ovality issue.

Answer / salai jeyaveeran

ovality is the differnce between major axis and minor axis
at the formation but the circularity is the shape of
perfection where it remains same

Answer / rama raju

Ovality is one of the error we observe while measuring
circularity of a shaft or bore.In ovality we can measure
diffrence in dimension measured in one palne.think of egg
as an example.

Answer / gopal

Circularity are measure with the ref of periphery and ovality are measure no of directional with ref of centre.
In more case circularity ok but ovality out

Answer / auke brandsma

While defining ovality, necessarily the form/shape of the object is supposed to be elliptical (generally in piping) and its formula is 2(A-B)/(A+B), where A is the maximum measurement of the object and B is the minimum.
While defining circularity, an elliptical form/shape is not necessary, and a virtual diameter is established, normally through 3D measuring machines. The maximum difference between this virtual diameter and the maximum or the minimum diameter, both wherein the object should fit, is defined as the circularity. If Dv is the virtual diameter, Dx is the maximum diameter, and Dm is the minimum diameter, then the circularity is the maximum of (Dx-Dv) AND (Dv-Dm).

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