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- Main bearings, also known as crankshaft bearings, are designed to support the crankshaft within the engine block. They are positioned at the main bearing journals of the crankshaft and provide support for the rotational motion of the crankshaft. Main bearings are subjected to radial loads and are crucial for maintaining the alignment and smooth rotation of the crankshaft.

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.