Worm Plastic Gears

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Worm series has an interesting characteristic that no other gears set has: the worm can easily turn the gears, but the gear can't turn the worm. This is because the angle on the worm is so shallow that when the gears try to spin it, the friction between the gears and the worm holds the worm in place.

Plastic steel worm & worm wheel standard
Worm Plastic Gear01

Worm Plastic GearsWorm Plastic Gears
Worm Plastic Gear02
Worm Plastic Gear02