The demand for high-accuracy, high-efficiency, and high-automation machinery is increasing concomitant with the rapid development of the industrial technology. As indispensable components of machinery, bearings determine the accuracy, performance, life span, and reliability of the host machine; therefore, the development of the bearing industry is necessary [
1–
3]. However, traditional metal bearings can hardly meet the requirements when the working conditions demand high precision and high stability as well as involve high overload, high temperature, and acidic environment. Under these conditions, wherein defects in rolling bodies and raceway are likely to occur, metal bearings are recommended to be replaced by ceramic ones, whose excellent properties include low density, high hardness, high wear resistance, and high corrosion resistance [
4–
6]. In recent years, ceramic bearings have been extensively applied in aerospace, precision machinery, petrochemical industry, national defense, and other fields. Consequently, the demand for high-precision ceramic balls increases along with the extensive application of ceramic bearings. Ceramic balls are widely used as the rolling bodies for bearings; thus, their precision must reach at least the G5 level. The details of the precision ball grades are listed in Table 1. Furthermore, as an important factor in bearing performance, high-precision ceramic balls present high commercial profit because their commercial demand increases by 15% each year [
6]. However, ensuring the quality of high-precision ceramic balls is challenging due to the different precision levels of semi-finished products and the difficulty of manufacturing ceramic balls. This issue provides a significant opportunity to conduct research on the processing of high-precision ceramic balls.