遠とお退のき角がく

noun

angle of recess

Technical term in gear mechanics: the angle through which the point of contact travels from the pitch point to the point where the teeth disengage.

• 歯は車ぐるまの設せっ計けいでは、遠とお退のき角がくが大おおきすぎると騒そう音おんの原げん因いんになる。

  In gear design, if the angle of recess is too large, it can cause noise.