Sarkar isarwa iri ɗaya ce da sarkar watsawa.Ainihin isar da sarkar suma sun haɗa da jerin abubuwan da fararen kaya, waɗanda aka gyara ta hanyar farantin sarkar da ke tattare da kamewa, da kuma dangantakar da ke tsakanin juna daidai take.

Kowane ɗaki ya ƙunshi fil da hannun riga wanda rollers na sarkar ke juyawa.Dukansu fil da hannun riga suna shan jiyya mai ƙarfi na ƙasa, wanda ke ba da damar haɗin gwiwar hinged a ƙarƙashin matsin lamba mafi girma, kuma suna iya jure wa nauyin nauyin da rollers ke watsawa da tasirin tasiri yayin haɗin gwiwa.Jirgin ruwa mai jigilar ƙarfi yana da jerin abubuwan sarkar daban-daban: filin sarkar ya dogara da ƙarfin bukatun Sirrin SPROck da abubuwan da ake buƙata na farantin sarkar.Idan ya cancanta, ana iya ƙarfafa shi.Hannun yana iya wuce ƙimar sarkar da aka ƙididdige shi, amma dole ne a sami tazara a haƙoran gear don cire hannun rigar.