A person or tool that applies, installs, or works with collets in mechanical or industrial settings.
From 'collet' + '-er' suffix (one who does something). This occupational term emerged with industrialization when machining became a specialized trade requiring trained workers.
Job titles ending in '-er' are one of English's most productive word formations—a colleter is simply 'one who colletes,' showing how any trade can instantly generate occupation names.
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