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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.

   - Tapered Roller Bearing: Tapered roller bearings consist of tapered rollers and raceways, with the rollers and raceways designed to meet at a common point on the bearing axis. This design allows the bearing to support both radial and axial loads, as well as combinations of these loads, making them suitable for applications where precise motion control and high load-carrying capacity are essential.