CNC Machining Techniques To Avoid Last-minute Surface Finish Problems

Do not assume that your supplier knows how surface finish relates to the end use of the part.

As a manufacturer or parts designer, you need to consider the surface finish of parts from a performance standpoint. That is, you are concerned with how the finish affects the final function and/or how the parts fit in with other components when assembling the product.

From the supplier's point of view, surface finish is either a side effect of the manufacturing process or may be an important feature in determining which processes will be used to produce the part and achieve a particular finish.

If finish is critical to the function and/or fit of the part, you can bring these different perspectives together by including the end-use of the part and its surface finish specifications in the RFQ.

At the microscopic level, even the "smoothest" surface has texture, consisting of peaks and valleys and their direction across the surface (also known as laying). Processes such as abrasive cutting, grinding, grinding, and milling affect these surfaces, as do tool selection and conditions, feed and speed, and other factors

Knowing the end application of a part can help your supplier make important decisions about how to achieve the required dimensions, tolerances, and surface finish.

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