Surface Roughness Measurement Methods

When it comes to machined parts in our daily lives, there are a wide variety Cut Aluminum Surface of surfaces: from smooth and shiny surfaces to rough and matte surfaces. These differences in the appearance of parts arise from differences in roughness between them. The surface of any machined part is a complex shape made of a series of peaks and troughs of varying heights, depths, and spacing. Surface roughness is defined as the shorter frequency of real surfaces relative to the troughs.

The larger the asperity, the rougher the feel to the touch. These surfaces also generate diffuse reflections of light, so they have a matte finish. On the other hand, if the asperity is extremely small, the surface feels smooth to the touch and appears shiny.

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