A hole mill is a precision cutting tool used for enlarging and finishing pre-existing holes with high accuracy and efficiency. Unlike drills, which create new holes, hole mills are designed to remove excess material from an undersized hole, ensuring precise dimensions, improved surface finish, and better roundness. They typically have multiple cutting edges, allowing for smooth and stable machining with reduced tool deflection. Hole mills are widely used in industries such as aerospace, automotive, and manufacturing, where tight tolerances are critical. Available in various configurations, including solid carbide and indexable insert designs, they offer high-speed performance and long tool life. Proper selection of cutting parameters, lubrication, and alignment is essential for achieving optimal results and extending tool durability.
