crankshaft
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It is the main rotating part of the engine and the power of the entire engine system
After the connecting rod is installed, it can undertake the up and down (reciprocating) movement of the connecting rod and turn it into a cyclic (rotating) movement. It is an important part on the engine. Its material is made of carbon structural steel or ductile iron. It has two important parts: the main journal, the connecting rod journal, (and others). The main journal is installed on the cylinder block, the connecting rod journal is connected with the big end hole of the connecting rod, and the small end hole of the connecting rod is connected with the cylinder piston, which is a typical crank-slider mechanism. The lubrication of the crankshaft mainly refers to the lubrication of the connecting rod big end bearing bush and the crankshaft connecting rod journal and the lubrication of the two fixed points. The rotation of the crankshaft is the power source of the engine. It is also the source power of the entire mechanical system.
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