During the use of impeller grinding tools, when the abrasive particles become dull, due to partial fragmentation of the abrasive particles or fracture of the binder, some or all of the abrasive particles fall off from the grinding tool, and new cutting edges or sharp abrasive particles constantly appear on the working surface of the grinding tool, allowing the grinding tool to maintain cutting performance for a certain period of time. This type of grinding tool has outstanding characteristics in terms of self sharpening compared to ordinary cutting tools. For the accuracy and flexibility of * *. However, hydrodynamic bearings are used in some special machine tools, such as those for processing fuel nozzles. When grinding the chuck, its roundness tolerance is between 0.2-0.4mm. The advantage of using a linear motor for the impeller is that it has short cutting time and saves positioning time. A linear motor can move at high speed with a speed of 30m/min and an acceleration of 3m/s2. According to the source of raw materials, there are two types of grinding tools: grinding tools and artificial grinding tools. The commonly used grinding tool in the mechanical industry is oilstone. Artificial grinding tools are distinguished based on their basic shape and structural characteristics, with grinding wheels that need to be visible. This is the cognition of Chiba Wheel based on its characteristics.