Nachdrehen

Nachdrehen is a German term that translates to "re-turning" or "post-processing" and is most commonly used in the context of manufacturing, specifically in machining operations. It refers to a secondary machining process performed on a workpiece that has already undergone an initial turning operation. This is typically done to achieve tighter tolerances, improve surface finish, or perform additional features that were not part of the original turning process.

The need for nachdrehen arises when the initial turning operation does not meet the required specifications for precision or surface quality. This could be due to various factors, including material deformation after the first operation, tool wear, or inherent limitations of the initial machining setup. Nachdrehen allows for these discrepancies to be corrected.

In practice, nachdrehen might involve a lighter cut with a sharper tool or a different machining strategy to refine the dimensions and surface texture of a previously turned component. It is a crucial step in ensuring the final product meets stringent quality standards, especially in industries like automotive, aerospace, and medical device manufacturing where precision is paramount. The process can also be applied to correct minor errors or to add secondary features like threading or grooving that were not feasible or necessary in the initial turning stage.