Aikin ƙirƙira na farko lokacin kera zoben da ba su da kyau shineƙirƙira zobe blanks. Layukan mirgina zobe suna juyar da waɗannan zuwa abubuwan da ake ɗauka don ɗaukar harsashi, ginshiƙan rawani, flanges, fayafai na injin turbine don injunan jet da abubuwa daban-daban na tsarin da aka matsa sosai.
Na'urorin lantarki na hydraulic sun dace musamman donƙirƙira zobe blanks: Babban runduna, dogon bugun jini da iya aiki mara iyaka sune abubuwan da ake buƙata don ingantacciyar ƙirƙirar zobe. Ana amfani da ko dai layukan sassauƙa sosai ko hanyoyin tashoshi da yawa tare da ingantaccen fitarwa, dangane da zurfin kewayon samfur da/ko ƙimar fitarwa da ake buƙata. Na'urori masu tsaka-tsaki, makamai masu jujjuyawa, mutummutumi da ma'aikata suna ba da garantin sassa masu dacewa da mutuƙar kulawa.