What is concentricity

Concentricity, the offset degree of the center of a circle, is a special form of coaxiality. When the measured elements are the center of the circle (point), the hole on the thin workpiece or the axis of the shaft, the measured axis can be regarded as the measured points, and their coaxiality to the reference axis is the concentricity. Therefore, the measurement of concentricity can be measured by projection.

Coaxiality is an important technical index to evaluate cylindrical workpiece. Coaxiality error directly affects the assembly and use of workpiece. However, when the axis of the measured element of the workpiece is very short, it is very difficult to evaluate its coaxiality, which is usually evaluated by concentricity.

Coaxiality error directly affects the fitting accuracy and use of the workpiece. The coaxiality error reflects the non concentricity of the center of the circle on the section, which is the concentricity, and the concentricity error is the offset degree of the center of the circle.