Bearings are used to support rotating shafts and come in different types depending on whether they are designed to withstand axial thrusts, radial loads, or both. The main bearing types are ball bearings, which use spheres, and cylindrical roller bearings, which use cylinders, with each type having different capacities for loads and misalignment. Deep groove ball bearings can withstand both radial and axial loads, while angular contact ball bearings have increased axial load capacity and self-aligning ball bearings are very tolerant of misalignment.