Roundness Measuring Instruments. Roundness Introduction Roundness measuring instrument is benchmark against precision rotary center, the quantitative evaluation of the cross-section roundness is made by measuring the radius varitation of actual contour of workpiece in different angle position to rotary center by sensor. It is used to measure the cross-section roundness and coaxiality of internal rotation and external rotation and face runout, etc Cylindricity Introduction Cylindricity measuring instrument is benchmark against precision rotary center and linear motion guide, the quantitative evaluation of the cylindricity is made by measuring the radius variation of actual contour of several cylindricity surface in different angle position to rotary center by displacement sensor in the guide. It is used to measure the error of contour shape of cylindricity workpiece (Roundness, cylindricity, planeness, straightness), position error ( concentricity, coaxiality, run-out and perpendicularity) Contact Us www.salbroengineers.com https://www.salbroengineers.com/mapview/19-1118641/72-8790282