Needle roller bearings in the electric tool industry can adapt to the compact internal structure of electric tools due to their small cross-sectional size and high radial load-bearing capacity. During the operation of electric tools, needle roller bearings can effectively reduce friction between rotating parts, improve transmission efficiency, and ensure stable tool operation. In common electric tools such as drills and chainsaws, needle roller bearings can accurately locate the rotating shaft, reduce vibration and noise, and extend the service life of the tool. At the same time, its excellent wear resistance and fatigue resistance meet the requirements of frequent start stop and high-speed operation of electric tools, helping them to achieve efficient and reliable performance. It is an indispensable key component for electric tools to achieve high performance.