Bearings make the rotation of objects smooth by reducing friction with rolling motion. Ball Bearings are often optimized for radial contact (bearing is perpendicular to its axis of rotation). This device only supports moderate axial loads. Type of lubrication to use: If the bearing is subject to high loads, the operation is continuous and the rotational speed high, then oil lubricant is the ideal solution to ensure the proper functioning of your rolling system. On the other hand, if the loads are low and the speed limited then grease will be more than sufficient.