The MAIN BEARING SET with the part number HCB152-6794 and the designation “.75MM” indicates an undersized bearing set for the main bearings in an engine. The “.75MM” notation signifies that these bearings are undersized by 0.75 millimeters compared to the standard size. Undersized bearings like these are used when engine components, such as the crankshaft or main bearings, have been machined or worn, and a smaller bearing is required to achieve the proper clearances. Main bearings are crucial engine components that support and allow the rotation of the engine’s crankshaft. They help distribute the load and forces exerted on the crankshaft, reducing friction and enabling smooth rotation. The undersized designation ensures a precise fit in the engine, allowing for correct clearances and optimal performance. The part number HCB152-6794 serves as a unique identifier, allowing individuals and mechanics to identify and order the correct main bearing set for a specific engine or vehicle model, ensuring a proper fit and optimal functioning within the engine’s main bearing system.

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