quadruple thread

a screw or worm gear having four equal threads and thus capable of being started in four places

Japanese Meaning

各ネジ山が4つに均等に配置され、4か所の位置から始動できるねじまたはウォームギア

To improve the feed rate in the lathe, the engineer designed a quadruple thread for the worm gear.

旋盤の送り速度を向上させるため、技術者はウォームギア用に4条ねじを設計した。

Sense（1）

a screw or worm gear having four equal threads and thus capable of being started in four places

quadruple threads

（ plural ）