a solid-state joining process which works by rotating one workpiece relative to another while under a compressive axial force; the friction between the surfaces produces heat, causing the interface material heating (see: friction welding; compare: linear friction welding), hõõrdkeevituse protsessi/operatsiooni meetod, kus liite moodustamiseks vajalik soojus tekib pöörlevate tooriku/toorikute otspindade vastastikusel hõõrdumisel (vt hõõrdkeevitus; vrd lineaar-hõõrdkeevitus)