The pinball shaker motor is a 12 volt motor with a counter weight fixed to one end.  The motor is encased in a safety enclosure.  The shaker motor is utilised on most visual pinball tables in some way or another. It is comopleltely controlled by the individual games and feels like a strong rumble which can be felt through the cabinet.  The shaker motor adds a really dynamic feel to the machine and is a must have for any pinball fan.