Answer
A cikin aikace-aikacen da ke da tsananin girgiza ko tasiri (misali, jackhammers ko injunan tsere), daidaitawar tazarar ƙarshen zobe na karkace dangane da axis na farko yana da mahimmanci. Idan jijjiga ya kasance daidai da rata, ƙarancin ƙarewar zoben na iya haifar da su don yin 'zaɓi' a kan tsagi, wanda zai haifar da lalacewa kuma a ƙarshe yana faɗaɗa tsagi. Madaidaicin da aka fi so shine a sami ratar daidaitawa tare da alkibla mafi girma na hanzari. Don zoben karkace, 'rabin' shine ainihin sarari tsakanin ƙarshen naɗin waya. Saboda zoben karkace suna da lamba 360-digiri (ba kamar circlips waɗanda ke da babban rata ba), a zahiri sun fi juriya ga rawar jiki, amma tabbatar da cewa an kulle iyakar a cikin tsagi har yanzu yana da mahimmanci don hana rushewa.
