Official Answer
Answer
Zurfin tsagi $d$ yana da mahimmanci saboda yana ƙayyade wurin ɗaukar zobe. Matsakaicin abin da aka yarda da shi dangane da lalacewar tsagi shine $P_g = \ frac {D \cdot d \cdot \pi \cdot \sigma_y}{S}$, inda $\sigma_y$ shine ƙarfin samar da kayan gida/shaft. Ko da zoben an yi shi da ƙarfe mai ƙarfi, idan an shigar da shi a cikin gida mai laushi na aluminum tare da tsagi mara zurfi, gidan zai lalata (tasa) a ƙananan kaya fiye da ƙarfin zobe. Dole ne injiniyoyi su daidaita $d$ don haɓaka kaya yayin tabbatar da cewa kaurin bangon shaft ko bura ya isa don hana gazawar damuwa.
