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 ...

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 ...

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 ...