What kind of machine did Leonardo da Vinci design to produce threads from fibers?

Leonardo da Vinci designed a spinning machine to produce thread from fibers.

Spinning transforms loose fibers such as flax or wool into a continuous strand by drawing them out and twisting them. Leonardo studied mechanical devices that could regularize this process, using gears, spindles, and rotating parts to reduce manual effort and improve consistency.

Textile production was economically important in Renaissance Europe, so improvements to spinning had practical value. Leonardo’s interest was part of a larger effort to mechanize repetitive work, including winding, twisting, and preparing materials for manufacture.

A spinning machine is not the same as a loom. A spinning device makes thread, while a loom interlaces finished threads to create cloth. It is also different from a sewing machine, which joins fabric after the textile has already been produced. Leonardo’s concept belongs to the earlier stage of fiber processing.