Category: Uncategorized
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Cylindricity is defined by a 3D tolerance bounded by two concentric cylinders. Unlike roundness, cylindricity is measured by a number of extracted points along a rotated surface about a common axis of a cylindrical, conical or spherical surface.
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GD&T datums control six degrees of freedom using primary (plane), secondary (line) & tertiary (point) references. Datum targets help with complex shapes.
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GD&T ensures manufacturing accuracy by using dimensional tolerances to control variations from exact dimensions.