Thread milling, or hole milling, is a machining technique in which threads of different sizes are created using a rotating tool that moves in a circular, ramping motion. The thread's pitch is formed through lateral motion during a single revolution of the tool. In contrast to tapping, which is commonly used for smaller applications, thread milling is typically employed for larger workpieces, providing greater versatility and precision, especially for complex or deep threaded holes. This process is particularly advantageous when dealing with hard materials or when producing threads with varying geometries.