Need to choose the right surface finish for CNC machining?

In some applications, surface roughness can significantly affect part function, performance, and durability. It affects the coefficient of friction, noise level, wear, heat and adhesion of parts in service. The importance of these factors varies from application to application, so while the surface finish of a part is immaterial in some applications, it is critical in many others. These applications include high tension, stress and vibration scenarios, mating and moving components, rapidly rotating parts and medical implants. As mentioned earlier, different levels of surface roughness are required in different applications.