Meaning of differential screw in English:

differential screw

See synonyms for differential screw

noun

Mechanics
  • A screw having two threads of different pitch in different parts of its length.

    The two threads might be of differing handedness (so that one unwinds as the other winds), or they may be of slightly different pitch (so as to generate small accurate movements corresponding to the difference of the pitches).

Origin

Early 19th century.