Answer
Matsakaicin RPM $N$ na zoben riƙon karkace yana iyakancewa ta wurin inda dakarun centrifugal suka shawo kan radial na zobe a kan tsagi. Ma'anar ita ce $ N = \sqrt {(448 \ cdot E \ cdot I \ cdot g) / (\rho \cdot A \ cdot R_m^3 \ cdot (R_o - R_i))} $ inda $ E $ shine modules, $ I $ shine lokacin rashin aiki $ $ g $ shine nauyi, $ _ rhotity radius. Yayin da zoben ke juyawa, tsakiyar taro yana haifar da radial force $F_c = m \cdot \omega^2 \cdot r$. Don zoben waje, wannan ƙarfin yana aiki don faɗaɗa zoben. Zane-zanen injiniya dole ne su tabbatar da yanayin aminci na aƙalla $2.0$ dangane da RPM mai aiki. Idan an wuce iyakar ƙididdigewa, masu ƙirƙira ya kamata su ƙididdige fasalin 'Kulle Kai', wanda ke amfani da hanyar shafi-da-slot don hana haɓaka diamita a ƙarƙashin babban saurin kusurwa.
