I-Crankshaft yenye yezona ndawo zibalulekileyo kwi-injini yokutsha yangaphakathi, ngumqolo we-injini, yinxalenye ephambili yokuthwala umthwalo wempembelelo kunye nokuhambisa amandla.

I-crankshaft iqulunqwe ubukhulu becala icala elingaphambili le-crankshaft, intamo ye-shaft engundoqo, ijenali yokudibanisa intonga, i-crank, ibhloko yebhalansi, isiphelo esingasemva se-crankshaft, njl njl. Umsebenzi wayo ophambili kukuguqula uxinzelelo lwegesi olusasazwa Iqela lepiston yokudibanisa intonga kwitorque yangaphandle, kwaye inokuqhuba umatshini wevalve yenjini yokutsha yangaphakathi kunye nezinye izincedisi ezahlukeneyo. Indawo yokusebenza kunye noxinzelelo lwe-crankshaft lunzima kakhulu, kwaye luxhomekeke kwimpembelelo edibeneyo yokutshintsha kwexesha legesi kuxinzelelo lwegesi, amandla e-centrifugal kunye ne-inertial force ngexesha lomsebenzi. Ke ngoko, ekuqhubeni nasekuveliseni, ukuchaneka komgangatho, ukuchaneka kwendawo kunye noburhabaxa bomphezulu benxalenye nganye ye crankshaft zineemfuno eziphezulu.

I-crankshaft iphoswe ngokubanzi kwintsimbi yekhabhoni ephakathi, intsimbi ye-carbon alloy okanye i-ductile iron