最簡單的(de)(de)答案是因為生(sheng)產力和利潤。雙主軸加(jia)工(gong)(gong)(gong)(gong)中心(xin)可(ke)以輕松完成(cheng)同類單主軸加(jia)工(gong)(gong)(gong)(gong)中心(xin)的(de)(de)二倍工(gong)(gong)(gong)(gong)作(zuo)量。假定保持(chi)機(ji)(ji)器(qi)忙碌的(de)(de)工(gong)(gong)(gong)(gong)作(zuo)負(fu)載(zai)是可(ke)用的(de)(de)。毫無疑(yi)問，制造商可(ke)以使用 雙主軸加(jia)工(gong)(gong)(gong)(gong)中心(xin) 在更短的(de)(de)時間內完成(cheng)更多零(ling)件加(jia)工(gong)(gong)(gong)(gong)。隨(sui)著產量的(de)(de)增加(jia)，車間的(de)(de)吞吐量大大提(ti)高。同時加(jia)工(gong)(gong)(gong)(gong)兩個工(gong)(gong)(gong)(gong)件，只占(zhan)用一臺機(ji)(ji)器(qi)的(de)(de)場地和一名cnc操(cao)作(zuo)員，變(bian)相(xiang)的(de)(de)增加(jia)了廠房機(ji)(ji)器(qi)數量減少(shao)了人工(gong)(gong)(gong)(gong)成(cheng)本并且提(ti)高效率。

　　在手機(ji)通訊(xun)、電子3C、新能源電池(chi)正(zheng)負極等行業中(zhong)，一名cnc操(cao)作員可(ke)以完成(cheng)多(duo)名cnc操(cao)作員的工(gong)作，從而降低了勞動力成(cheng)本。雖然一臺雙主(zhu)(zhu)軸(zhou)加工(gong)中(zhong)心(xin)比普(pu)通的機(ji)床的費用(yong)高很多(duo)，但是(shi)一臺雙主(zhu)(zhu)軸(zhou)加工(gong)中(zhong)心(xin)的高產量、高效率、低勞動成(cheng)本是(shi)遠遠優于普(pu)通單主(zhu)(zhu)軸(zhou)加工(gong)中(zhong)心(xin)的。