A horizontal mill is a type of milling machine that uses a horizontal spindle to cut materials. It features a rotating cutter that moves parallel to the workpiece, allowing for efficient material removal. This design is particularly effective for machining flat surfaces, grooves, and slots. Horizontal mills are commonly used in manufacturing and metalworking industries. They can handle larger workpieces compared to vertical mills and often have multiple cutting tools, which increases productivity. These machines are versatile and can be used for various operations, including drilling and boring, making them essential in workshops and factories.