The Standard GB/T 31703-2015 for Silicon Nitride Balls in Ceramic Ball Bearings was published by the National Quality Inspection Bureau of China on June 2, 2015. This standard became effective from May 1, 2016, and is available in both Chinese and English versions. It specifies detailed requirements for silicon nitride balls used in ceramic ball bearings, including material specifications, dimensional tolerances, surface finish standards, as well as the testing methods and quality evaluation criteria necessary to ensure the durability and performance of these critical components. The standard aims at providing a comprehensive guideline that enhances the international competitiveness of China's bearing industry by setting high-quality benchmarks for silicon nitride balls. With its implementation, manufacturers are expected to produce superior quality ceramic ball bearings that meet stringent global standards.
*** Please note: This description may not be accurate, please refer to the official documentation.