In the field of precision manufacturing in pursuit of superior quality, concentricity is one of the core geometric tolerances for measuring the quality of rotating body parts (e.g., shafts, bearings, gears, sleeves). It is directly related to the rotational balance, service life and overall performance of the product. So, what is concentricity? And how to measure it accurately and efficiently?

I. What is Concentricity?

Concentricity is based on the geometric tolerance standard, Deviation of the measured element (e.g. axis of a cylindrical or conical surface) from the spatial position of the datum axis (usually also a cylindrical axis). In short, it measures whether the centerlines of two or more cylinders (or holes) are “perfectly aligned” on the same line.

Concentricity deviation will cause rotating parts (such as motor shafts, bearings) to produce violent vibration and noise, and accelerate the uneven wear of parts, shorten the service life, and even affect the assembly accuracy and the overall performance of the product (e.g., sealing, transmission efficiency).

II. How to accurately measure concentricity?

        POMEAS Image Dimension Measuring Instruments provides an efficient and accurate non-contact solution for fast measurement of concentricity and 2D/3D dimensions to improve production efficiency.

III. Watch strap inspection cases: