Ball bearings are critical components in many machines and equipment and play a central role for low-friction movement of parts. Design-based protection of rolling bearings against overload and failure due to overheating, contamination and external influences is therefore one of the fundamental tasks of a design engineer. Ball bearings can for example be sealed or one can use roller bearings already sealed by the factory to achieve the longest possible service life. To minimize friction and wear, it is necessary to ensure that bearings are sufficiently lubricated. As part of maintenance, the ball bearings must therefore be checked and relubricated as needed. However, modern industrial technology increasingly uses self-lubricating or non-serviceable sealed rolling bearings, which are already equipped by the manufacturer with corresponding sealing elements and lubricant deposits.