A tool grinder is a machine used to sharpen and shape cutting tools, such as drills, end mills, and lathe tools. It operates by using an abrasive wheel to grind the tool's surface, ensuring it maintains a sharp edge for efficient cutting. Tool grinders are essential in manufacturing and maintenance, as they help prolong the life of tools and improve their performance. These machines come in various types, including manual and automatic models. Some advanced versions may feature computer numerical control (CNC) technology, allowing for precise adjustments and repeatability. Proper use of a tool grinder can significantly enhance productivity in workshops and factories.