Bearings are critical components in rotating machinery, and their performance significantly affects system stability, reliability, and safety. Over-skidding is a newly identified and critical phenomenon in rolling element bearings that demands increased attention. While skidding occurs when the rollers’ tangential speed is below the shaft speed, over-skidding arises when the rollers exceed the speed imposed by the shaft rotation. Under pure rolling conditions, the rollers and the inner ring are expected to operate at the same tangential speed; However, in specific situations, the roller speed may exceed the theoretical speed determined by the shaft speed, resulting in over-sliding. Consequently, the friction between rolling elements will increase, potentially leading to premature bearing defects. To determine the over-skidding rate, two parameters must be obtained: theoretical and actual Ball Pass Frequency of Outer Race (BPFO). For this purpose, frequency domain analysis is employed to extract this information from the raw vibration signal. Specifically, the Fast Fourier Transform (FFT) is applied to convert the time-domain signal into the frequency domain. Within this domain, the frequency of the shaft is first extracted. Using the corresponding theoretical equation, the theoretical BPFO is then calculated, while the actual BPFO is obtained directly from the frequency spectrum. By comparing theoretical and measured actual BPFO, over-skidding rate could be estimated. The results show that, contrary to skidding—which typically arises under low-load, high-speed conditions—over-skidding occurs when the load is high, and the speed is low. Furthermore, reducing the load and increasing the speed were found to diminish over-skidding.