Machine tools are the basic equipment of the machinery manufacturing industry, and crossed roller bearings also have a wide range of applications in the field of machine tools. Machine tools require high-precision, high-rigidity, and high-stability spindles and transmission systems to achieve high-precision workpiece processing. As a key component of the machine tool spindle and transmission system, the crossed roller bearing can provide high-precision, high-rigidity, and high-stability support and transmission. For example, in some high-end CNC machine tools, crossed roller bearings are used in spindle bearings and transmission bearings, which can withstand harsh environments such as high speed, heavy load, and high temperature, ensuring the stable operation of the machine tool.