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.

The function of a single row deep groove ball bearing is to provide support for radial and axial loads, reduce friction, facilitate smooth and efficient rotation, and maintain the integrity and performance of mechanical systems. Here are the key functions of a single row deep groove ball bearing: