The 90-degree bevel gear connection increases the motor's rotation speed by a ratio of 1:1.67, increasing the speed of the jaw. A pair of 24-tooth spur gears transfers the power higher. A five-stud beam links the lower jaw to the top spur gear. The beam is connected off-center on the gear, giving the gear a cam-like effect, causing the beam to reciprocate. As a result, the jaws continuously cycle up and down when the medium motor spins:
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