Which type of motor is not commonly used in electric clippers?

The correct answer is pneumatic motor. In the context of electric clippers used in barbering, pneumatic motors are typically not utilized because they require compressed air to function, which is not practical for handheld grooming tools. Electric clippers are designed for convenience and efficiency, operating on electrical power rather than relying on air pressure.

On the other hand, rotary motors are commonly used in electric clippers because they provide steady power and can handle various hair types and textures effectively. Magnetic motors also find application in clippers due to their speed and lightweight design, which makes them easy to maneuver. Spring motors, while less common in the latest models, may still be found in some specific types of clippers.

In summary, pneumatic motors are impractical for the design and use of electric clippers, making them the least likely type of motor to be found in such devices.