Official Answer
Answer
Ana shigar da zoben riƙewa na karkace ta hanyar baza jujjuyawar da 'juya' su cikin ramin. Matsakaicin iyaka shine nau'in roba na kayan. Matsakaicin diamita na shigarwa $D_{max}$ dole ne ya wuce wurin da damuwa na fiber $\sigma = \frac{E t (D_{max} - D_{free})}{D_{max} D_{free}}$ ya wuce ƙarfin yawan amfanin ƙasa $\sigma_y$. Don kayan maɗaukakin maɗaukaki kamar ƙarfe na carbon, ana amfani da madaidaicin madauri ko hannun riga don tabbatar da faɗaɗa iri ɗaya. Idan zoben ya wuce gona da iri fiye da 'iyakarsa', ba zai dawo zuwa diamita na asali ba, yana haifar da sako-sako ko 'rattle' a cikin tsagi. Wannan yana da haɗari musamman a aikace-aikacen da aka yi wa girgizar axial, saboda zoben zai iya girgiza kuma ya sa bangon tsagi.
