Iivalve zebhabhathane eziphindwe kabini, ezikwabizwa ngokuba ziivalve zebhabhathane zokusebenza okuphezulu, Idlala indima ebalulekileyo kwizicelo zeshishini apho ulawulo lokuhamba luyimfuneko. Ngokungafaniyo neevalve zebhabhathane, Uyilo oluphindwe kabini lwe-eccentric lubonisa idiski ye-offset kunye ne-shaft ebonelela ngamandla okutywina okuphuculweyo kunye nokunciphisa ukunxiba ngokuhamba kwexesha. Olu uyilo olukhethekileyo luvumela ukusebenza okufanelekileyo,