The four main types of bearings are ball bearings, roller bearings, plain bearings, and thrust bearings. Each type is designed to address specific load-bearing requirements and operational conditions in various machines and equipment across different industries.

   - Cylindrical Roller Bearings: Cylindrical roller bearings are used in applications where high radial load-carrying capacity, rigidity, and precision are essential. They are employed in machine tool spindles, electric motors, and industrial equipment where heavy loads and precise motion control are critical.

   - Taper Roller Bearings: Taper roller bearings are not designed to accommodate misalignment to the same extent as spherical roller bearings. They are more suitable for applications where precise axial and radial load support is required without significant misalignment.