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.

In summary, the key differences between spherical roller bearings and cylindrical roller bearings lie in their design, load-carrying capacity, misalignment compensation, and application specificity. Each type of bearing is tailored to meet specific operational requirements and environmental conditions in diverse industrial applications.

In summary, the purpose of the deep groove type of ball races in a ball bearing is to enable the bearing to support radial and axial loads, reduce friction, facilitate smooth rotation, distribute loads evenly, and contribute to the overall efficiency and reliability of the bearing in various mechanical applications.