A "geared head" refers to a type of mechanical device that uses gears to transmit power and control motion. These devices are commonly found in machinery, such as lathes and milling machines, where precise movement is essential. The gears allow for adjustments in speed and torque, making it easier to perform various tasks. In the context of machinery, geared heads can enhance the performance and efficiency of tools. They help in converting high-speed motor rotation into lower speeds with increased force, which is crucial for tasks that require more power, such as cutting or shaping materials.