singleturned

Singleturned is a term used in machining to describe a component produced by a single turning operation on a lathe, without subsequent turning passes that modify the external geometry. The concept contrasts with multi-pass turning or processes that refine dimensions through several turning steps.

Production characteristics include using a single toolpath to establish the final outer diameter and length, with careful stock preparation and precise tool control to meet tolerance and surface finish requirements. After turning, parts may still undergo non-turning finishing operations such as deburring, chamfering, or heat treatment, but no additional turning passes are performed for profile changes.

Applications and typical parts are common in mass or batch production where simple, uniform profiles are needed, such as shafts, spacers, bushings, and valve stems. The approach is favored for shorter cycle times and simpler setups when the required geometry is straightforward, though it may limit the ability to correct complex features in the same operation.

Etymology and history: The term is formed from “single” and “turned” and is used primarily in engineering catalogs and shop floor discussions. It emphasizes the single turning operation and distinguishes parts from those produced by multiple turning operations or more complex turning strategies.

See also: Turning, Lathe, Multi-pass turning, Finishing operations, Roughing and finishing.