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Cylindricity is the condition of a surface of revolution in which all points on the surface are equidistant from the axis. It differs from roundness in that it simultaneously controls the roundness of circlar line elements and the straightness and parallelisum of the straight line elements of the surface.

The Cylindricity symbol is used to describe an object conforms to a cylinder axis. a cylindrical feature to ensure that it is round enough and straight enough along its axis.

cylindricity GD&T


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