What term refers to the rotational speed of a motor based on its rotations per minute?

The term that refers to the rotational speed of a motor in terms of its rotations per minute is revolutions per minute, commonly abbreviated as rpm. This measurement is crucial in understanding how fast a motor operates; it indicates the number of complete revolutions made by the motor's shaft in one minute.

In the context of power tools and motors, knowing the rpm allows you to assess the performance capabilities of a tool. For example, a higher rpm usually indicates a faster rotation, which can be beneficial for tasks requiring quick cutting or drilling.

Other terms, such as torque, represent the rotational force that the motor can exert, while watts measure power consumption or output rather than the speed itself. The speed factor is less commonly used in conjunction with rpm and does not have the same direct meaning as revolutions per minute. Therefore, rpm is the appropriate and widely recognized metric for defining the rotational speed of motors.