最簡單的(de)答案是因為生產(chan)力和利(li)潤。雙主軸(zhou)加(jia)(jia)工(gong)(gong)(gong)(gong)中心可以輕松完成同類(lei)單主軸(zhou)加(jia)(jia)工(gong)(gong)(gong)(gong)中心的(de)二倍(bei)工(gong)(gong)(gong)(gong)作量(liang)(liang)。假定保(bao)持機(ji)(ji)器忙碌的(de)工(gong)(gong)(gong)(gong)作負(fu)載是可用(yong)的(de)。毫無疑問，制(zhi)造商可以使用(yong) 雙主軸(zhou)加(jia)(jia)工(gong)(gong)(gong)(gong)中心 在更短的(de)時(shi)間內完成更多零件(jian)加(jia)(jia)工(gong)(gong)(gong)(gong)。隨著產(chan)量(liang)(liang)的(de)增加(jia)(jia)，車間的(de)吞(tun)吐量(liang)(liang)大(da)大(da)提(ti)高。同時(shi)加(jia)(jia)工(gong)(gong)(gong)(gong)兩個(ge)工(gong)(gong)(gong)(gong)件(jian)，只占用(yong)一(yi)臺機(ji)(ji)器的(de)場地和一(yi)名cnc操作員，變相的(de)增加(jia)(jia)了廠(chang)房(fang)機(ji)(ji)器數量(liang)(liang)減少了人工(gong)(gong)(gong)(gong)成本并且提(ti)高效率。

　　在手機通(tong)(tong)訊(xun)、電子3C、新能源電池正負極等(deng)行業中(zhong)(zhong)(zhong)，一(yi)名cnc操作員(yuan)可以完成(cheng)多名cnc操作員(yuan)的工作，從而降低(di)了勞動力成(cheng)本(ben)。雖然一(yi)臺雙主軸(zhou)(zhou)加(jia)工中(zhong)(zhong)(zhong)心比普(pu)通(tong)(tong)的機床的費用(yong)高(gao)(gao)很多，但是一(yi)臺雙主軸(zhou)(zhou)加(jia)工中(zhong)(zhong)(zhong)心的高(gao)(gao)產量、高(gao)(gao)效(xiao)率(lv)、低(di)勞動成(cheng)本(ben)是遠遠優于普(pu)通(tong)(tong)單主軸(zhou)(zhou)加(jia)工中(zhong)(zhong)(zhong)心的。