Answer
Ƙarfin ƙaddamar da taro shine ƙananan Ƙarfin Shear Ring ($ P_r$) da Ƙarfin Ƙarfin Ƙarfin Ƙarfafa ($ P_g$). $P_r = \ frac{D \cdot t \cdot π \cdot S_s}{K}$, inda $S_s$ shine ƙarfin shear kuma $K$ shine ma'aunin aminci (yawanci 3). $P_g = \ frac {D \ cdot d \ cdot π \ cdot S_y}{K}$, inda $d$ shine zurfin tsagi kuma $S_y$ shine ƙarfin samar da kayan gida/shaft. A kusan dukkanin lokuta da suka shafi kayan laushi kamar aluminum (6061-T6), tsagi shine iyakanceccen abu. Wurin zai 'birgima' ko kuma ya lalace ta hanyar filastik, yana haifar da zoben ya ci abinci kuma a ƙarshe ya gaza. Dole ne injiniyoyi su ƙididdige iyakacin '' tsagi' ta amfani da dabara $P_{def} = \ frac{A_s \cdot S_y}{\phi}$, inda $\phi$ shine madaidaicin kididdigar ma'aunin nauyin.
