Gearing refers to the system of gears used to transmit and control mechanical power. Gears can be used to increase or decrease the speed and torque of a rotating shaft, and are typically made of metal and meshed together to transmit power from one gear to another.

Bearings are mechanical components that support and guide rotating shafts, reducing friction and wear between moving parts. Bearings can be made of a variety of materials, including steel, ceramics, and plastics, and can be found in a wide range of applications, from small household appliances to large industrial machines.

Motion refers to the movement of objects, including the movement of mechanical components in a machine. Motion can be linear or rotary, and can be driven by a variety of means, including electric motors, engines, and manual effort. The design and control of motion systems are critical to the functioning and performance of many mechanical devices and machines.