Idan aka kwatanta da masu rotors rauni, rotors keji suna da ingantacciyar inganci da aminci, amma rotors keji kuma za su sami matsaloli masu inganci a cikin yanayi tare da farawa akai-akai da manyan inertia na juyawa.
Dangantakar da magana, ingancin amincin simintin rotors na aluminum ya fi kyau, sandunan rotor suna da kyau haɗe tare da madaidaicin juzu'i, kuma ikon yin tsayayya da haɓakar zafi yayin farawa motar ya fi ƙarfi. Duk da haka, ba za a iya watsi da lahani masu inganci kamar ramukan raguwa da sanduna na bakin ciki waɗanda ke faruwa a lokacin aikin simintin aluminum, da kuma matsalar fashewar mashaya ta hanyar dumama na'ura mai juyi, musamman ga yanayin ƙarancin kayan mashaya da ƙarancin aikin simintin aluminum. matsalar ta fi tsanani.
Lokacin da aka sami matsala tare da rotor na simintin aluminum, ana iya yin hukunci gabaɗaya daga saman saman rotor da wasu kyawawan abubuwan mamaki. Lokacin da na'ura mai juyi yana da matsalar mashaya karya, tabbas zai yi zafi sosai, kuma saman rotor zai sami bayyananniyar yanayin blueing a wani bangare ko gaba daya. A cikin lokuta masu tsanani, za a sami ƙananan beads na aluminum da aka kafa ta hanyar kwararar zafi. Wannan matsalar galibi tana faruwa ne a tsakiyar sashin mashaya. Lokacin da rotor simintin aluminum ya yi zafi, zoben ƙarshen rotor shima zai lalace. A cikin lokuta masu tsanani, iska a ƙarshen rotor za a jefar da su cikin radially kuma suna lalata iskar stator.
Don masu rotors biyu na squirrel, rotors mai zurfi, rotors masu siffar kwalba, da dai sauransu, waɗanda ake amfani da su don inganta aikin farawa, da zarar sandunan rotor sun karya, matsayi na raguwa yakan faru a wurin walda kusa da ƙarshen zobe. Karyewar sandar rotor ya faru ne saboda maimaita tasirin yanayin zafi na dogon lokaci, ƙarfin wutar lantarki mai canzawa, ƙarfin centrifugal da damuwa na tangential, wanda zai haifar da lanƙwasa da gajiya ga sanduna. Sanduna da zoben ƙarewa sun fi samun matsala. A lokacin aikin farawa motar, saboda tasirin fata, sandunan rotor suna mai zafi ba daidai ba, kuma sandunan rotor suna fuskantar matsin lamba zuwa ga axis; lokacin da motar ke aiki akai-akai, sandunan rotor da zoben ƙarewa suna ƙarƙashin ƙarfin centrifugal, kuma sanduna suna haifar da damuwa mai nisa daga axis. Wadannan matsalolin za su yi barazana ga amincin bangarorin biyu na sandunan rotor. Domin inganta ingancin walda na rotor, an yi amfani da fasahar brazing matsakaici-mita sannu a hankali kan aikin walda na manyan rotors.