Which of the following is NOT a method to mount a motor to a surface?

Mounting a motor to a surface is an essential aspect of mechanical design, ensuring proper alignment, stability, and functionality. The methods commonly used for mounting a motor include base mounting, front face mounting, and flange mounting. Each of these methods involves attaching the motor securely to a structure to prevent movement during operation.

The base mounting method involves securing the motor to a flat surface, usually by bolting it down, which provides a stable foundation. Front face mounting allows the motor to be attached from the front side, typically directly to a frame or another component. Flange mounting involves using a flange attached to the motor casing, which can be bolted to a surface, offering an easy and reliable installation.

The shaft, or rotor, is a rotating component of the motor, which is not designed for mounting the motor itself. Instead, it serves the purpose of transmitting mechanical power and motion. Since the shaft is meant to rotate and is not a structural component for attachment, it does not function as a mounting method. Hence, the identification of the shaft (rotor) as the correct answer highlights the distinction between structural components designed for secure attachment and those designed for motion and power transfer.