Detailed Product Description Detailed Product Description Crankshaft is an important part of mud pump and is made of cast alloy.The crankshaft is made of cast alloy steel and is furnished with big geared ring ,connecting rod and bearing.the tooth from of the big-geared ring is herringbone gear.Thr gear bone and the crankshaft surface is interference fitted and they are both fastened with boltd and lock nuts..the big end of the connecting rod is mounted on three eccentric strapsof the crankshaft through the signle row short cylindrical roller bearing and small end on the crosshead pin through double row long cylindrical roller bearing.