worm drive

Noun

 * 1) A worm and wheel, a gear arrangement consisting of a screw (the worm) whose thread meshes with a gear wheel to turn the direction of drive through a right angle, typically with a large (1:10 to 1:60) speed reduction and similar torque increase.

Translations

 * German:
 * Hungarian:
 * Russian: червя́чная переда́ча
 * Swedish: snäckväxel
 * Ukrainian: черв'я́чна переда́ча