What machine did Leonardo da Vinci design to produce textile thread by twisting fibers?

Leonardo da Vinci designed a spinning machine to produce textile thread by twisting fibers.

Leonardo’s textile studies included mechanisms intended to automate parts of spinning, the process of drawing out and twisting fibers into yarn. His sketches show how gears, spindles, and rotating components could coordinate operations that were commonly performed by hand. The goal was greater consistency and productivity in textile manufacture.

Spinning is different from weaving. Spinning turns loose fibers such as wool or flax into thread, while weaving interlaces threads on a loom to make fabric. This distinction helps separate Leonardo’s spinning-machine concepts from his other textile drawings.

Leonardo created many mechanical proposals without building every design. His textile inventions demonstrate his interest in replacing repetitive manual labor with synchronized machinery. They also belong to a long technological history that later included water-powered and industrial spinning machines, which operated on principles and scales beyond Leonardo’s workshop-era concepts.