Official Answer
Answer
Gefen gefe shine nisa $z$ daga tsagi zuwa ƙarshen shaft. Idan $z$ ya yi ƙanƙanta, kayan da ke tsakanin tsagi da ƙarshen shaft na iya kasawa a cikin 'shear sau biyu' ko 'shear-out.' Rashin gazawar yana kama da ƙaramin 'toshe' kayan da aka tura daga ƙarshen ramin. Margin da ake buƙata shine yawanci $z \ ge 3 \ cdot d$ (inda $d$ ke zurfin tsagi). Idan gazawa ta faru ko da tare da $z> 3 \cdot d$, yana iya kasancewa saboda 'ƙarshen lokaci-jawo' na ƙarshen shaft. Wannan ya zama ruwan dare a cikin kayan karyewa kamar simintin ƙarfe. Injiniyoyin ya kamata su yi bincike mai ƙayyadaddun ƙayyadaddun abubuwa (FEA) don tabbatar da cewa haɗin gwiwar (axial Shear + lankwasawa) a kusurwar tsagi bai wuce ƙarfin juzu'in kayan ba.
