When cutting a ductile work material, an increase in cutting speed will generally A)degrade surface finish which means a higher value of R_a B)improve surface finish which means a lower value of R_a

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Quizplus · Accepted Answer

Increasing cutting speed typically results in a finer finish on the workpiece, meaning the surface roughness value (denoted by R_a in this context) decreases. This is because higher speeds can lead to smoother cutting actions and less tool-workpiece interaction time, reducing the opportunity for surface imperfections.

When Cutting a Ductile Work Material, an Increase in Cutting