Roundness is the measure of how closely the shape of an object approaches that of a mathematically perfect circle. Roundness applies in two dimensions, such as the cross sectional circles along a …

Dec 21, 2014 · Sometimes called roundness, circularity is a 2-Dimensional tolerance that controls the overall form of a circle ensuring it is not too oblong, square, or out of round.

Circularity is a refinement of size. For example, a circular feature might have a large diameter tolerance, but may need to be quite round. In the example below, notice that circularity only “sees” the elliptical …

Aug 28, 2025 · The roundness value is then defined as the maximum deviation between the contour and this circle, commonly used in evaluating shafts, rods, and similar components.

Roundness, which regulates the deviation from the geometrically perfect circle, is measured using a micrometer or a coordinate measuring machine. This page explains the advantages and …

Feb 18, 2025 · In simple words, the term roundness is defined as a value that is used to compute the errors that appear in a perfect circle. In other words, roundness can be replaced by the term …

The measurement of out-of-roundness (usually referred to simply as “roundness”) is an extremely important assessment. For example, a rotational bearing whose components are not accurately …

Oct 4, 2025 · While a car’s tire or a spinning ball bearing may appear to be a perfect circle, at a microscopic level, they possess minute surface imperfections. These deviations define the object’s …

May 25, 2025 · While roundness and circularity are often used interchangeably, roundness specifically refers to the circular condition of a feature’s cross-section. Circularity is a broader term applicable to …

Jul 3, 2009 · Roundness is a measure of the sharpness of corners and edges of a given particle and is associated with sphericity and the compactness of a shape. A circle is the most round shape, so …