Sicut mechanica transmissione pars, circulum calces se plerumque non directe adjust directionem rotationis, sed ludit a key munus in tota transmissione ratio. Meshing cum aliis annus, potest afficit vel indirecte mutare directionem gyrationis.

Anulus annulus Ludere a partes ut pars transitus ratio in multis mechanica systems, praesertim in planetarium calces systems et slewing gestus. In his applications, rotatione directionem circulum calces et directionem virtutis tradenda sunt reguntur per Meshing cum aliis anni. Anulus calces matched cum suis anni Gears et rotatione directionem adiungitur per motum de his Gears.

In planetarium calces systems, circulum calces solet internum calces, quod meshes cum centralis solem calces et multiple planetarium Gears. Per inputting potentia ad solem calces aut fixing anulum calces et applicando potestate ad planetarium Gears, rotatione directionem ratio mutare secundum. Structurarum notas planetarum calces systems enable utroque gyrationis solis calces et gyrationis circulum calces ad afficit directionem gyrationis de output hastile. Si converterent Meshing Gears additur ratio consilio, directionem output gyrationis potest esse adaequatum.

In plaga portantes, circulum calces connectitur coegi ratio externa calces plerumque pulsus electrica motricium aut hydraulicis motricium. In calces annulum de sistit afferentem concedit in hastili ad gyrari CCCLX gradus in certo structuram et directionem rotationis mutari per reversing motricium et adjusting structuram de calces ratio. Hoc modo, in rotatione directionem circulum calces potest esse mollius accommodetur ad consequi directional switching de gyratorius motus.

In aliquo speciali automation apparatu, in calces anulum potest etiam cum converterent transmissione mechanism, ut motor dispensata converso tradenda ratio, ad consequi temperatio rotationis directionem. The forward and reverse switching of the electric motor, or the control of the rotation direction of the ring gear through some specially designed gear sets (such as gearboxes with reverse function), can change the working direction of the entire equipment.