The guys from the YouTube channel How To Make Everything have been looking at one such sketch, a screw thread-cutting machine. At first glance, it seems a little flawed. Threads are hard to make ...

In most cases, it's okay to cut screws, but you have to be careful not to damage it. Machine screws, which have tightly spaced threads, are at more risk of damage than the widely spaced threads of ...

Screw threads are another simple machine, and can be thought of as a long, gently sloped inclined plane wrapped around a cylinder. Cut a long right triangle out of paper, wrap it around a pencil ...

Watch the intricate process of threading screw rods using hand tools and a lathe machine in a mechanical workshop. The video takes you through each step, from measuring and cutting the rod to ...

Apparently nobody noticed Leonardo Da Vinci's designs from the late 1400's for screw-cutting machines, because first machine to cut screws was built in 1568 by a French mathematician, Jaques Besson.