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These four basic parts work together to enable the tapered roller bearing to support radial and axial loads, provide precise motion control, and withstand the demands of various applications.

In summary, main bearings are primarily responsible for supporting the rotational motion of the crankshaft and withstanding radial loads, while thrust bearings are designed to counteract axial forces and maintain the axial position of the crankshaft. Both types of bearings play critical roles in ensuring the smooth and reliable operation of engines and machinery.