Why Concentricity Measurement Is Important In Manufacturing

In manufacturing, the design of each component contributes to and determines the usefulness and effectiveness of the end product. If concentricity is not measured and remedied before the product is sent into manufacturing, it could create a chain reaction that will cause serious issues later down in the assembly pipeline. This is highly cost-ineffective as it would incur high costs for your project. Therefore, concentricity must be measured and ensured of the right value. In addition, all the parts should work cohesively together before the product design is sent into production.

What Is Concentricity?

Concentricity is considered a type of complex tolerance, and its value is calculated to determine to which extent the geometric shape would be closest to the ideal form. First, median points of the spherical and cylindrical parts are established. Then, when the piece is concentric, the thickness of the internal and external walls will be consistent and equidistant. This would be critical in ensuring that the dimensions of the finished products will not exceed the manufacturing tolerances, which helps in fitting parts accurately in their intended application and will prevent any unintended vibratory movement and resistance.

What To Choose: Concentricity or Total Runout?

Concentricity is measured or calculated using a process also known as total runout. The two types of measurements are similar, but they vary in specific components. Both are determined using an axial orientation or alignment and also pose the challenge of being difficult to calculate. The median points are established in a spherical and circular axis in calculating concentricity. At the same time, the total runout is determined by fixating a datum point and then turning the part around to ensure median points fit within the tolerance zone.  

How Is Concentricity Usually Measured?

There are three ways concentricity is usually measured to ensure minimal error in the manufacturing process. The first is using a sample drawing to map out the axes of the cylindrical or spherical shape, and the aim is to ensure the median points are accurate coaxially. The next most commonly used method is using an equipment called the dial gage.

The dial gauge is placed on the circumference’s vertex of the product, where the axis of the tolerance would be determined. Then, the product would be rotated, the maximum and minimum runout values would be calculated, and the specified circumference would be measured. This difference in maximum and minimum values would be considered concentricity.

The last way concentricity is measured would be through a coordinate measuring machine, where the circle of the plane is calculated instead of coaxially. Then, the stylus is placed at the datum circle’s measurement point and the target circle’s measurement point, where the concentricity is measured.

Why Choose Willrich Precision?

Willrich Precision offers over four decades of inspection, metrology, and gauging experience. We  provide a vast range of services and products to clients, including advanced metrology technology and measurement equipment for vision and laser systems. Furthermore, we take great satisfaction in establishing ourselves as a pioneer in measuring instrumentation technology and, as a result, can serve a diverse spectrum of clients from various sectors. Every client connection is given top priority. That is why we offer you a free consultation and access to our team of seasoned professionals that are highly competent and can assist you.

Please contact us at info@willrich.com now for more information about our inspection and metrology services and products!

by George Chitos

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