Kamar yadda aka ambata a sama, slewing drives an haɗa su sosai, cikakkun hanyoyin rage jujjuyawar da'irar{{0}. Amfaninsu ya wuce wannan. Duk da yake abubuwan da aka haɗa da lodin da mafi girma da mafi ƙanƙanta ke motsa su na iya bambanta da sau goma, girman su, musamman ma ma'aunin axial na jirgin ƙasa, yana da kamanni. Wannan yana sauƙaƙe ƙaddamar da tsarin haɗa abubuwan haɗin gwiwa a cikin jerin watsawa, don haka rage girman girman kayan aikin injiniya gabaɗaya.
Bugu da ƙari, duka kayan aiki da kayan tsutsa masu kashewa, saboda babban bambancin girman da ke tsakanin abubuwan tuki da abubuwan da ake tuƙi, cikin sauƙin cimma ma'aunin watsawa mai girma, wani abin da ba a iya samu ta wasu nau'ikan watsa saurin canzawa cikin sauƙi.
