Ueda We began studying ways of resolving this issue around December 2017. Quadrant glitches arise from frictional fluctuations that inherently occur in ball screws when the direction of motion is reversed. These frictional fluctuations are due to the basics of ball screw construction. For years, it was widely believed that there was no fundamental solution to this problem. Then, one day, my manager brought me an NSK internal technology report that was issued in the late 1970s. It was in this report that I found the concept that would ultimately become the driver for the new technology we recently announced. Back then, quadrant glitches in ball screws were not considered as much of an issue as they are today. So, even though the idea was good, it never made it into product development since there was little demand for it in the market. Today, however, technological advances in machine tools have created demand for higher-precision ball screws. Nearly 40 years ago, NSK had already discovered an effective technological solution to a present-day issue. I think this speaks to the strength of NSK’s technology base as a pioneer in ball screws. So, building upon NSK’s years of ball screw technology, we employed our original numerical simulation techniques, which we had invented in the process of bearing development, to find a way to reduce quadrant glitches. We significantly reduced frictional fluctuations during reversals in the direction of ball screw motion to achieve a smoother motion.