Advanced Turning

Factors affecting surface roughness

Factors affecting the surface roughness include cutting edge geometry, accuracy, built-up edge, tool wear, machine tool accuracy, chip breaking properties and cutting conditions. These also differ according to the type of machining (external, internal, etc).


Click the links below to read more.

Arithmetical mean roughness(Ra) is one way of calculating roughness. Ra means the value obtained by the following formula and expressed in micrometer when sampling only the reference length from the roughness curve in the direction of the mean line, taking X-axis in the direction of the mean line and Y-axis in the direction of longitudinal magnification of this sampled part. The roughness curve is expressed by y = f(x):