Answer
A cikin silinda na hydraulic, zoben karkace sau da yawa suna fuskantar lodin axial masu ƙarfi waɗanda ke jujjuyawa tare da hawan keke. Factor Safety $SF$ shine rabon da aka ƙididdige Ƙarfin Ƙarfafa $P_r$ zuwa Matsakaicin Load ɗin Aiki $P_{max}$. $SF = \ frac {P_r}{P_{max}}$. Don manyan lodi, $SF$ na $2$ na kowa ne. Don kaya mai ƙarfi ko girgiza, yakamata a ƙara $SF$ zuwa $3$ ko $4$. Dole ne lissafin kuma ya yi lissafin 'Groove Material Factor' $K_g = \ frac{\sigma_{y,actual}}{\sigma_{y,ref}}$. Idan an yi gidaje da ƙananan kayan aiki (kamar 6061-T6 Aluminum), ƙarfin ƙaddamarwa mai tasiri na taro yana raguwa sosai. Tsarin ya zama $P_{eff} = P_r \cdot \frac{\sigma_{y,housing}}{\sigma_{y,ring}}$, kuma $SF$ dole ne a yi amfani da wannan ƙaramin $P_{eff}$.
