How we developed the Juntor Crystal

How we developed the Juntor Crystal

How we developed the Juntor Crystal The problem that exists when designing a watch from the beginning is that all elements have to be developed from the ISO standards, which in the case of crystal construction refers to ISO 14368-1: 2000. The standard refers to crystals glued and crystals with joint together to describe the design of edges will adapt to the step of the wacth case and compress the Teflon gasket for sealing. The rule explains that the most important thing about the crystal design is the height h1 that should be equal to or less than the subtraction of t with the sum of h2 + h3. Thus the equation would be h1 = t (h2 + h3) where t is the thickness of the crystal, h2 the lower edge, which would be between 0.15 and 0.40mm.The angle β is between 35°≤β≤ 40°. In the Juntor crystal is of a size of 36.4 mm and a thickness of 3.14 mm. So from h2 not very pronounced, not to widen much the support step in the middle case, we chose 0.20 mm plus an angle of 37 °. The result was h1 of 2.7 mm, sufficient for the design of the joint. The problem with the Juntor crystal is that it protrudes out of the middle case, so it is necessary to provide very good adaptation to the joint with the size...
Factors to consider in stainless steel machining

Factors to consider in stainless steel machining

Factors to consider in stainless steel machining   The concept of EXTático emerges from the design of shapes for industrial objects, the use of different processes and the use of different materials for the same design of the watch. One of these materials is stainless steel for our watch cases, which is chosen for its resistance to corrosion and the ease of achieving it. The problem is that it contains nickel is that the more quantity in the alloy much more possibility of contact allergies. Steels are alloys of iron-carbon wherein carbon is 2%. Stainless steels are steel alloys containing chromium with a minimum of 10.5%, which allows to increase the resistance to corrosion. Chromium combined with oxygen produces a thin layer of oxide that allows its passivation. The corrosion resistance can be improved with the addition of nickel, which in turn increases the austenitic phase or molybdenum. Stainless steels are classified into martensitic, ferritic, austenitic, precipitation hardened stainless and duplex. Martensitic steels are discarded for watch cases because of their difficulty in machining and their fragility. Ferritic steels are paramagnetic and can interfere with the accuracy of the watch mechanism. Despite the low nickel content in the steels by precipitation as 420 or the F51 duplex we also reject them due to their magnetic affinity. Austenitic steels are the most interesting for watch cases that we can use by EXTático, whose main component is austenite. Austenite, also known as gamma steel (γ) is a particular ordering mode of iron and carbon atoms. Gamma or austenitic steel is the stable form of pure iron at temperatures ranging from 900...
My machining experiences between 7075 Aluminum and Gun metal bronze to the Juntor watch

My machining experiences between 7075 Aluminum and Gun metal bronze to the Juntor watch

Gun metal juntor machining experiences   What a beginner most afraid when starts to machining are three things, the sound, the smoke and the sparks of the contact of the tool with the work material. With respect to sparks, when using titanium or magnesium alloys there is a great danger of ignition, which means that apprehension to them must be watchful. In any case, that is no problem in the aluminum and bronze alloys that we currently use in the Juntor. Although in the old Juntor we use alloys of steel, titanium or bronze to aluminum, we are now opting for aluminum and bronze alloys of tin called Gun metal, since the current Juntor has a marked tactical component. Loud sound in machining appears when cutter has a large diameter. This is because cutting surface increases. So cutting deeper, faster and more feed surface of the workpiece on each step sound increases. If the beginner is not get used, it will seem that the machine bursts. For veterans this sound is a music to their ears. At the beginning I recognize that I was very afraid to machining. Now the sounds helps me to know that I have to decrease the cutting speed or change the milling cutter. Smoke is exactly the same. It frightens when you do not know what the matter is. It happened a couple of times because I measured wrong tool length. With excessive friction of the tool to the metal in the area without cutting. That is a big problem when machined brass because it can change the color of the piece and darker. If...
New packaging project in EXT LAB

New packaging project in EXT LAB

We have started to develop a new pack for Juntor watch. This pack is made from propylene material. It is made by machining with a flange in order to mechanic retention. As well, it has a internal support to keep the watch in the same position. It should withstand all kind of movements on the delivery. This pack is designed, developed and made in our workshop, in Alcoy...
We should recover the private area for EXT customers

We should recover the private area for EXT customers

We should recover the private area for EXT customers.   In 2006, when we introduced our website we developed a private area for our customers. The clients could access directly from the our website and it included several sections: – Guarantee: Clients had access to the conditions of the guarantee and the expiration date. – Contract: Included the technical specifications of the EXT watch acquired and he could download the invoice if required. -Technical service:  Customers could contact directly with our technical service, creating a notifications history, like o-ring changes, new straps, bezels of different colors, etc. – Newsletter: EXT customers received a quarterly newsletter about our unique way of feeling time. – Notifications: A notifications history for each customer to the brand or us to them. – Forum: EXT customers from around the world could be in touch with each other through a forum relationship.  They could participate in various topics related to time or the way we live life in Spain. – Merchandising: Customers could acquire different accessories like straps, links, bezels, shirts or glasses. By that time we found it a very attractive idea, because if a customer pays a high price for a watch, likes to have an interaction with the company. Unfortunately the area was not successful at all. We thought that the problem was that the idea was very ahead of its time. Now that social networks and the Internet are booming, this private space should be recovered again. As well, we are ready to make things, we consider that this is the moment to re-start  this area. We realized that there are a lot of posts explaining this idea, looking for an added value to a product. We were...