A tapered reamer is a specialized tool used in machining to create or enlarge holes with a gradual increase in diameter. This design allows for a smooth transition between different sizes, making it ideal for fitting parts together, such as in automotive or aerospace applications. The taper helps to guide the tool into the hole, reducing the risk of misalignment. These reamers come in various sizes and materials, often made from high-speed steel or carbide for durability. They are commonly used in conjunction with drills to achieve precise hole dimensions, ensuring that components fit together perfectly in assemblies.