Official Answer
Answer
Ana ƙididdige ƙarfin ƙarfin da aka dogara akan zoben zobe kamar $ P_r = \ frac {D \ cdot T \ cdot \ pi \ cdot S_s}{S}$, inda $ D $ shine diamita na shaft / bore, $ T $ shine kauri na zobe, $ S_s $ shine ƙarfin ƙarfi na kayan, kuma $ S $ shine yanayin aminci (yawanci 3). Koyaya, yawancin ƙarfin tsarin galibi ana iyakance shi ta wurin ƙarfin abin da ake samu na tsagi maimakon ƙarfin juzu'in zobe. Ƙarfin shear $S_s$ shine kusan $0.6 \ sau$ ƙarfin juzu'i na kayan bazara. Don zoben bakin karfe 302 tare da 160 ksi ƙarfin ɗaure, $S_s$ zai zama kusan 96 ksi. Wannan lissafin yana ɗauka cewa zoben yana zaune da kyau kuma tsagi yana da kusurwar murabba'i.
