Answer
Katangar radial $b$ ita ce faɗin lebur waya da ake amfani da ita don murɗa zoben. Yana ƙayyade ƙayyadaddun radial na zobe da yawan damuwa yayin shigarwa. Ana ƙididdige damuwar shigarwa $ S_a$ azaman $ S_a = \ frac {E b imes (D_g - D_f)}{D_f imes (D_g + b)}$, inda $D_g$ shine diamita na tsagi kuma $D_f$ shine diamita kyauta. Babban bangon radial yana ƙara ƙarfin turawa da kwanciyar hankali na centrifugal amma kuma yana ƙaruwa da damuwa da ake buƙata don faɗaɗa (na waje) ko kwangila (na ciki) zobe don shigarwa. Idan $b$ ya yi girma da yawa, kayan na iya wuce wurin samar da amfanin sa yayin shigarwa, yana haifar da zoben 'sako' wanda ba ya zama daidai a cikin tsagi. Mafi kyawun ƙira yana daidaita bangon radial don samar da isasshiyar haɗin gwiwa ba tare da ƙetare iyakokin kayan abu ba.
