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The early wood screws were made by hand, with a series of files, chisels, and other cutting tools, and these can be spotted easily by noting the irregular spacing and shape of the threads, as well as file marks remaining on the head of the screw and in the area between threads. Many of these screws had a blunt end, completely lacking the sharp tapered point on nearly all modern wood screws. Eventually, lathes were used to manufacture wood screws, with the earliest patent being recorded in 1760 in England. During the 1850s swaging tools were developed to provide a more uniform and consistent thread. Screws made with these tools have rounded valleys with sharp and rough threads. Some wood screws were made with cutting dies as early as the late 1700s (possibly even before 1678 when the book content was first published in parts).

Once screw turning machines were in common use, most commercially available wood screws were produced with this method. These cut wood screws are almost invariably tapered, and even when the tapered shank is not obvious, they can be discerned because the threads do not extend past the diameter of the shank. Such screws are best installed after drilling a pilot hole with a tapered drill bit. The majority of modern wood screws, except for those made of brass, are formed on thread rolling machines. These screws have a constant diameter, threads with a larger diameter than the shank, and are stronger because the rolling process does not cut the grain of the metal.

 

Metal screws and nuts used to fasten two objects together first appeared in the fifteenth century.

Around the first century, screw shaped tools became common, however, historians do not know who invented the first. Early screws were made from wood and were used in wine presses, olive oil presses, and for pressing clothes. Metal screws and nuts used to fasten two objects together first appeared in the fifteenth century.One of the early type of screw was auger, because at that time 15th century the only tools people have to make holes was chisel and to connect things together they use pins and nails.This is where they invented the auger. Is just simply a wood handle bar connected to a screw to help drill holes.

Until in 1797, Englishmen, Henry Maudslay (1771-1831) invented a large screw-cutting lathe that made it possible to mass-produce accurately sized screws. In 1798, American David Wilkinson also invented machinery for the mass production of threaded metal screws.

The screw on the left (A) was handmade in the late 18th century. Note the flat spot on the shaft, the irregular threads, blunt tip and the off center slot. The screw in the center (B) is machine made around 1830. It has sharp, even threads, a cylindrical shape, blunt end and the slot is still off center. The screw on the right (C) is a modern gimlet screw, post 1848, with tapered shaft, even threads, pointed tip and centered slot.

 

 

Reference & Image

wikipedia. 2018. Screw. [ONLINE] Available at: https://en.wikipedia.org/wiki/Screw. [Accessed 22 March 2018].

RubyLane.com. 2018. RubyLane.com. [ONLINE] Available at: https://www.rubylane.com/item/61838-416096x20RL01308/Early-Hand-Turned-Wood-Screw-C. [Accessed 22 March 2018].

Youtube. 2018. Brief history of the screw. [ONLINE] Available at: https://www.youtube.com/watch?v=0lOaF_wcbjM. [Accessed 22 March 2018].

Youtube. 2018. Brief history of the screw. [ONLINE] Available at: https://www.youtube.com/watch?v=0lOaF_wcbjM. [Accessed 22 March 2018].

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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