Torque Arms

Torque arms can be used to absorb and transfer reaction force generated at the screwdriver during fastening from the robot to an external frame or structure. With a torque arm the robot only needs to move to the screwdriving point, the torque reaction is received by the torque arm. Some can balance the weight of the tool; however, they may also have a significant effect on freedom of movement, reducing the flexibility and reach of the robot.

One example is the SMC Carbon Arm from Atlas Copco, which has a lightweight telescopic design to maximize flexibility, and allow for smooth movements.

There are several options available with different mechanical configurations and payloads, however they do make the installation and programming of the robot more complex.