A jet mill is a type of grinding equipment that uses high-velocity jets of air or steam to reduce the size of particles. It operates by accelerating particles through a nozzle, causing them to collide with each other and break apart. This process is effective for producing fine powders, often used in industries like pharmaceuticals and chemicals. Jet mills are known for their ability to create very fine particles without the use of grinding media, which can introduce contamination. They are also capable of handling a wide range of materials, including metals, ceramics, and polymers, making them versatile in various applications.