Worm and Face Gear Drive

Worm: 2 starts.
Wheel: 30 teeth.
Transmission ratio: 15.
Rotary axes of the worm and the wheel are skew at an angle of 90 deg. It works like a spiral bevel gear drive but its transmission ratio is easy to get higher.
Here tooth profile of the wheel was created in an approximate way, so the motion is not smooth.

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