Pillow block ball bearing is rolling bearing combined with a bearing unit. Most of Rolling bearings are the heart of the diameter of the outer ring made of spherical, and inside the hole with a spherical bearing installed together, the structure forms, good versatility and interchangeability. At the same time, such bearings in the design also has a certain tone heart and mind, easy to install, has a dual structure of the sealing device, you can work in harsh environments.