Roundness is a property of a surface of revolution where all points on the surface are equidistant from the axis. The roundness of any profile can only be specified if the same center is found for the measurement. Diameter and roundness are measured by different methods and instruments. For diameter

Roundness measurementRoundness is defined as the condition of a surface of revolution. In the case of cylinders and cones, all points of the surface intersect any plane perpendicular to a common axis.Equipment for measuring roundness 1) Diameter gauge. 2) Circumferential conferring gauge=> the shaf

A roundness tester is a precision instrument for measuring the out-of-roundness of a rotating surface (shaft, hole or spherical surface) of a part.