Gesamtdrehvorschub

Gesamtdrehvorschub, often abbreviated as Vz or Fz in technical literature, denotes the total feed per revolution of a workpiece relative to a cutting tool during turning operations. The term originates from German machining terminology, where “Dreh” refers to turning and “Vorschub” to feed. It is a key parameter in metalworking, influencing surface finish, dimensional accuracy, tool wear, and cutting forces.

In practice, Gesamtdrehvorschub is calculated as the product of the spindle speed (n, in revolutions per minute) and the axial feed rate (f, in millimetres per revolution). The resulting value, expressed in millimetres per minute, represents the linear speed at which the tool advances along the workpiece surface. Engineers select appropriate values of Gesamtdrehvorschub based on material properties, tool geometry, desired tolerance, and machine capabilities.

A higher Gesamtdrehvorschub generally increases material removal rates and reduces machining time, but may lead to poorer surface quality and higher tool stresses. Conversely, a lower feed per revolution improves finish and prolongs tool life, albeit with longer cycle times. Optimization often involves balancing these trade‑offs, sometimes employing variable feed strategies such as roughing followed by finishing passes.

Standard references, such as DIN 8580 and ISO 1832, provide guidelines for selecting feed rates in conventional and CNC turning. Modern computer‑controlled machines allow precise adjustment of Gesamtdrehvorschub, supporting complex profiles and automated process monitoring. Understanding and controlling this parameter is essential for efficient and high‑quality turned components across industries ranging from automotive to aerospace.