Gear coupling is a type of mechanical coupling that is used to connect two rotating shafts. It consists of two gear teeth, one on each shaft, which are meshed together to transmit torque and rotation between the two shafts. The gear teeth are typically made of steel or other strong metals.

Gear couplings are commonly used in industrial applications where high torque and heavy loads are present, such as in mining, steel mills, and power generation. They are also used in applications where shaft misalignment is present, as Gear couplings are able to accommodate both angular and parallel misalignment.

One of the benefits of Gear couplings is their ability to transmit high torque without slipping or losing efficiency. They are also able to compensate for axial movement of the shafts and can operate at high speeds without producing excessive vibration or noise.

Gear couplings are available in a variety of sizes and configurations to fit different shaft sizes and application requirements. They may be made with straight-cut or helical-cut gear teeth, and may have a single or multiple gear teeth on each shaft. Some Gear coupling are designed to be maintenance-free, while others require regular lubrication to operate effectively.