Official Answer
Answer
Ana amfani da madaidaicin madauri don faɗaɗa zobe a hankali yayin da ake tura shi kan ramin. Babban diamita na mandrel ya kamata ya zama ɗan girma fiye da diamita na shaft, kuma kusurwar taper ya kamata ya kasance tsakanin $ 3 ^ ∘ $ da $ 5 ^ ∘ $. Matsakaicin kusurwa yana ƙara haɗarin ƙara matsawa zobe (saitin dindindin), yayin da kusurwa mara zurfi yana sanya kayan aiki tsayi da yawa. Dole ne a taurare saman mandrel (HRC 58-62) kuma a goge shi zuwa ƙarewar madubi ($ R_a <0.2 μm$) don rage juzu'i da hana galling. Don zoben juyi da yawa, madaidaicin dole ne kuma ya yi lissafin motsin 'iska' yayin da zoben ke faɗaɗa, galibi yana buƙatar shigar da jahannama.
