Abstract

This paper shows the nature of the turned surface produced by a turret lathe under some low-frequency vibration conditions. In shop language the surface is referred to as a “barber-pole finish” or a “spiral cut.” Conditions causing this type of surface are shown together with a theoretical analysis. Some data on vibration magnitude and surface roughness are given. A discussion is included on the degree of balance obtained in commercial motors and its effect on surface finish.

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