Needle roller bearings can be used in the spindle system of machine tools in the machine tool industry. With their small cross-sectional size and high load-bearing capacity, they can withstand large radial loads in a limited space, ensuring the rotational accuracy and stability of the spindle and improving machining accuracy. In the feed system of machine tools, needle roller bearings help achieve precise linear motion, reduce friction and wear, and improve transmission efficiency. In addition, on the rotating worktable and other components of some machine tools, needle roller bearings also play a supporting and guiding role, enhancing the rigidity and reliability of the components, assisting the machine tool in achieving efficient, stable, and high-precision machining, and meeting the machining needs of various complex parts.