Although it may seem irrelevant on the surface, it is unwise to ignore it completely. Screw (screw), the inventor’s last name is too old to test, and it is now mostly used for the mechanical connection of complex movement components. In the watchmaking industry, the role of screws is indispensable, and this evaluation is brief and fair. A tabulation dictionary compiled by GA Berner defines a screw as: ‘A mechanism for fixing or assembling. Screws usually consist of the following: a screw shaft (shank), fully or partially threaded; and a screw head with a notched screwdriver ( Head). ‘
Hublot Classic Fusion Berluti Watch
Honestly, retelling definitions doesn’t help us much. It is worth noting that screws-this kind of mechanism that uses spiral surfaces to connect two elements-appeared in mechanical watches and arsenals in the early Renaissance, and its age was about the same as that of hairsprings. Until the industrialization of the nineteenth century, there was no uniform standard for screw threads. Every watchmaker makes his own screws, so today’s restorers must prepare a variety of taps, dies, and wrenches to make replacement screws and other missing components.
Hublot Big Bang Meca-10 Watch ‘H’ Screw
With a little inattention, the screw slipped out of the hand and disappeared without a trace. It is difficult to find it again, and even using a magnet is almost impossible. This is often learned by apprentices when they start to watchmaking. first lesson. The screws have multi-pointed corners and are twisted and twisted. The irregular shape is difficult to clamp with the tips of tweezers. Once they are lost in the air, they can only land on their four feet and lie on the work table. It seems that this is not enough, watchmakers are keen to use screws of different lengths and sizes, this is their special way to drive the restorer crazy. Therefore, identifying and remembering the position of each screw on the base plate or bridge is particularly critical.
Richard Mill RM 033
Some screws have unique shapes, which are relatively easy to identify and identify for specific uses. But be aware that experienced craftsmen often group screws systematically, but for them, it is not easy to ensure that all screws are in order, because nothing can be more like one screw than another. Screws. In order to prevent disasters, the watchmakers invented a method of identifying screws by left-handed threads: this type of screw is usually used to assemble a ratchet of a barrel, with a line on each side of the slot on the screw head. As for the other screws … looks exactly the same, only good luck!
Most screws are made of stainless steel. The steel is quenched and tempered to ensure the balance between ductility and hardness, so that the screw will not distort the shape when tightened, and even if the stress is too large, the screw will not be as direct as glass Shattered. Outdated screw heads sometimes break suddenly, and insufficient heat treatment is one of the possible reasons. This can have serious consequences: after all, it is not easy to remove a broken threaded rod from a brass or gold component.
Burned blue screws are mostly used in antique watches
In addition, antique watches mostly use burnt blue screws. This is a clear signal for the restorer that the screws are made of tempered steel. Burning blue has a long-lasting coloring effect. The specific color tone ranges from blue to purple to black. To a certain extent, it can prevent metal corrosion due to excessive humidity. As in the past, some leading watchmakers still use burnt blue screws. The fired blue steel screws have colored head notches, which is not necessarily the case with screws that are colored by chemical electrolysis. The latter process saves time and money.
Although the world of screws is infinitely small, it must also adhere to strict rules. For a screw to have a place in a premium watch, it must meet stringent aesthetic standards. As noted by watchmaker George Daniels in his Watchmaking book, ‘In the old days, watchmakers always chamfered the edges of screw slots to prevent scratching; but today, it may be for the economy The benefit is that this practice has almost disappeared. In fact, when making new screws, the watchmaker only needs to swing the file to complete the retouch, and the screws will maintain a new look no matter how many times they are twisted.
Richard Mille Tourbillon RM 50-02 Double Chasing Chronograph
Reinventing the old can innovate
In recent years, some brands have developed autonomously used screws and special screwdrivers for tightening and loosening. Some are simple hollow hex screws, which are often used in automobile cylinder heads and sports bicycle cranks; others are drilled with two or three small holes in the head to replace conventional notches. The advantage of these structures is that they effectively prevent the screwdriver from scratching the surrounding metal, but they do require the restorer to prepare suitable tools to open the case and replace components. We now know that the mechanic had to remove the rim from the sports car, but was suffering from the embarrassment of not having the right tools to open the ‘anti-theft’ device.
F.P Journe Perpetual Calendar
François-Paul Journe was one of the first modern watchmakers to assemble watch cases with special screws, and Richard Mille, who was inspired by the F1 field, was also among them. Since then, many brands have introduced their own unique designs, including Hublot’s ‘H’ screws and Oris ‘Y’ screws. In contrast, many brands with original movements and modern designs prefer screws that are inspired by traditional styles (rather than the original retouching we expect). Other brands use standard screws to connect the bottom and middle of the case, and autonomous screws are used as finishing touches, so that only authorized restorers can discover the secrets of the heart of the watch