Tallafin kayan aikin duba mota abu ne mai sauƙi. Baya ga babban daidaiton toshe analog a duk sassan kayan aikin duba mota, ana tabbatar da cewa daidaiton tsayin sauran sassan ya zama ƙari ko ƙasa da ±0.01MM, kuma siffar na iya zama ƙari ko ƙasa da 0.1mm. A cikin iyakokin ɓangaren, tsarin ɓangaren kuma mai sauƙi ne, wanda shine ɓangaren tallafi mai sauƙi. Kafin sarrafawa, ana fara tantance kayan kayan da ke shigowa. Tallafin tallafi an yi shi ne da ƙarfe da aluminum. Dangane da samfurin abokin ciniki, Zaɓi tushen tallafi na kayan daban-daban, da farko ƙayyade girman kayan da ke shigowa yayin sarrafawa, da kuma ko ƙarfen yana da gefe na 0.3~0.5MM.

Injin niƙa yana fara huda ramuka. Domin sauƙaƙe sarrafawa, dole ne a bugi wurin goyon bayan ƙarfen da wurin tunani. Ya kamata a sanya ramin fil ɗin da ke cikin ramin makafi a wurin. Injin niƙa yana sarrafa ramin fil da ramin sukurori kuma yana aika maganin zafi bayan an gama taɓawa. Taurin shine HRC45. °C~48°C, sassan da aka tsara na kujerar tallafi da aka tsara a kasuwa gabaɗaya ba su taurare ba. Domin la'akari da tsawon lokacin sabis na sassan, duk sassan ƙarfe na kayan aikin duba abin hawa masu kauri za su taurare. Bayan an gama maganin zafi, tsayin kujerar tallafi ya kamata a niƙa shi da kyau zuwa ±0.01MM, siffar shine ±0.1MM, saman tallafi ya yi laushi kuma an yi masa bayanin yanke waya da injin NC. Bayan an kammala dukkan hanyoyin, cire chamfer ɗin ya dace. Ana sarrafa kayan aikin duba mota sifili.