Official Answer
Answer
Don samar da girma mai girma, shigarwa na hannu tare da filashi ba shi da inganci kuma yana iya wuce gona da iri. Ana amfani da 'Mandrel' (na zoben waje) ko 'Tapered Sleeve' (na zoben ciki). Mandar yana da tafki mai laushi wanda sannu a hankali yana faɗaɗa zoben yayin da ake tura shi axially ta hanyar plunger. A ƙarshe zobe yana zamewa daga mandrel kuma ya 'snaps' zuwa cikin tsagi. Maɓallin aikin injiniya shine 'Mafi girman Faɗawa' ba tare da saiti na dindindin ba. Ana ƙididdige wannan azaman $\epsilon = _x000c_rac{t(D_g - D_i)}{(D_g - t)(D_i + t)}$ inda $D_g$ shine diamita faɗaɗa kuma $D_i$ shine ID na farko. Matsakaicin kusurwa yawanci $3^\circ$ zuwa $5^\circ$ don rage ƙarfin da ake buƙata da kuma guje wa ƙulla zoben.
