Nietdraaiend

Nietdraaiend is a Dutch adjective describing objects, components, or states that do not rotate relative to a reference frame. It is used primarily in technical, engineering, and scientific contexts to contrast with parts or conditions that are draaiend (rotating) or roterend.

Etymology and orthography: The term is formed from the negation niet (not) and draaiend (rotating). It may appear as niet draaiend or with hyphenation as niet-draaiend, depending on stylistic guidelines for compounds.

Usage and context: In mechanical engineering and design, nietdraaiende onderdelen are stationary parts such as housings, frames, mounts, or the stator of an electric machine when described from the perspective of a moving rotor. In dynamics and kinematics, the distinction between nietdraaiend and draaiend is used to specify reference frames and to simplify equations of motion. The concept is also applied in quality inspection and maintenance to identify non-rotating components that may have different wear patterns or failure modes than rotating parts.

Relation to related terms: Nietdraaiend contrasts with draaiend, roterend, and statisch. It is often used together with terms like niet-draaiende referentieframes (non-rotating reference frames) or niet-draaiende delen (non-rotating parts). In broader Dutch technical vocabulary, it sits alongside 静态 terms such as statisch and stationair, depending on the discipline.

See also: draaiend, roterend, statisch, stationair, referentiekader, mechanica.