The Worm Gear is a fast way to increase shaft torque without using a large number of intermediate gears, creating an equivalent 16:1 ratio. However, Worm Gears are inefficient and will lose some of their power, leading to a much slower output speed. This loss rate goes up as the input speed does.
(Example of how and when this can be used needs to be supplied. Pictures help with example)
(Picture of crafting recipe required)