That’s a small step from such a nail to a screw.Īround 1550 AD, the earliest metal nuts и bolts as fasteners appeared in Europe. In the 16th century, nail makers began to produce nails with spirals that could connect things more firmly. In the Middle Ages, carpenters used nails or metal nails to connect furniture to wooden structures. It may have been designed by skilled craftsmen in ancient Egypt for irrigation on both sides of the Nile. Maybe he just describes something that already exists. The real inventor may not be Archimedes himself. Archimedes spiral is a huge spiral in a wooden cylinder, used to raise water from one level to another and to irrigate fields. The first person to describe a spiral was the Greek scientist Archimedes (287 BC-212 BC). Video of Self-tapping Screw Production Development History of Self-tapping Screw Difference Between a Self-Drilling Screw and a Self-Tapping Screw.How can self-tapping screw get in easily.In order to achieve their own tapping purposes, the hexagonal drill tail screw is generally pointed, in order to facilitate the squeezing into the object to be screwed. Self tapping screw is not necessary, while screwing in the tapping itself. The difference between self-tapping screw and general screw is that the general screw must have a machined screw hole to screw in. When should you use a self tapping screw?Īs the name implies, it simply means a screw that can be tapped by itself.What is the difference between a self tapping screw and a normal screw?.What is the Difference Between a Self-Drilling Screw and a Self-Tapping Screw?.How can self-tapping screw get in easily?.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |