Watch maintenance where, 10 steps to tell you!

- Apr 10, 2019-

We all know that in watch maintenance, the most important thing is the maintenance of the machine core. Today, let's talk about how the 2892 of the three treasures of ETA core is maintained. The core is thinner and more accurate than 2824. After deep modification and adjustment, it can meet the standards of the accreditation of the Observatory. Omega, Ding Rudder and Haoya have all used the core.


We all know that in watch maintenance, the most important thing is the maintenance of the machine core. Today, let's talk about how the 2892 of the three treasures of ETA core is maintained. The core is thinner and more accurate than 2824. After deep modification and adjustment, it can meet the standards of the accreditation of the Observatory. Omega, Ding Rudder and Haoya have all used the core.


With the improvement of your aesthetic taste and economic strength, when choosing the first watch, many friends choose to start from 2892. But it's not easy to repair and maintain after starting. After your love watch is sent to the maintenance center, the correct treatment method can not be without these 10 steps, you may as well serve as a reference for future maintenance.


Shell



Usually, the shell is cleaned by ultrasonic wave to remove the residual stains which can not be seen by naked eyes. In addition, the flexible rotation of the movable outer ring is ensured. For the silicone grease consumed by buttons, handles and bottom covers, proper amount of silicone grease should be added to replace the ageing waterproof rubber ring to ensure the waterproof effect.


Dismantling, washing and assembling of machine core



The treatment of machine core is the most important part in maintenance, which can be divided into three modules: disassembly, washing and assembly. "Disassembly" means inspecting faulty parts, replacing worn parts and deformed screw. "Wash" time, need to use 120# solvent gasoline, after two washing and one bleaching steps, and then through 10-inch mirror carefully check whether there are residual stains, check whether the gemstone axle eye is bright, whether the tenon is bright and wear-free, and finally put it in the oven to dry at 50 degrees, then the machine core will become clean as new.



"Assembly" means assembly. In the process of assembly, the watchmaker needs to ensure smooth and smooth operation of the six major gear trains with machine core. The driving system is required to be flat, smooth, with clearance in the axle to ensure that there is rotation; the original system can completely release the power of the spring and not slip when the spring is tightened; and the core component of the machine core, the escapement speed regulation system, needs to ensure that the spring of the escapement fork is strong, the swing wheel rotates flexibly, the yarn is smooth and the micro-swing frame is kept, and the fine-adjusting screw is in the middle effective section; the hairpin system is in the upper and the pull-out section. The needle time is moderate, the gear is obvious and the reset is accurate; the automatic winding system needs to ensure that the automatic gyro can freely winding after full winding, and there will be no jamming teeth and flywheels when the chain is manually winding; the final calendar system needs to check the validation date when the jump is strong and accurate, and the calendar with half or slow jump is not allowed to appear.


Come on.


Refueling is not washing oil, nor is it just adding a single kind of oil. There are strict rules on how much and what part of the fuel is added first and then. The "oil" added is generally the following four kinds: ointment, heavy oil, light oil, horseshoe oil. Oil should not be higher than 1/2 of Shiwan. There is no oil on the axle center of the bowl edge, and there can be no oil on the parts except the contact surface. Only in this way can the lubrication and beauty of the parts be ensured. For special brand requirements, we have to follow the brand requirements.


Adjustment


For maintenance, the adjustment of four directions can ensure the accuracy of travel time. The requirement is that the pendulum on the surface and under the surface of the watch should be more than 280, while the pendulum on the 3, 6 and 12 words should be more than 260. Within 10 seconds, within 0.2 of polarization, the lines are compact and clear.


Literal needles


Literary can not be offset, three needles and literal parallel spacing is equal, time, sub-difference is not more than 3 points, 45 points to 0 points to complete the calendar exchange. The whole literal processing should be done: needle dust-free, no new scratches, fingerprints. The new form should be disassembled and assembled seamlessly. These seemingly trivial things, but all require a high degree of professional accomplishment and patience.


Inspection of Machine Core Assembly



When tightening the screw, it is necessary to use the screwdriver and screw in strict accordance with the appropriate proportion of the size to ensure that screw holes can not be scratched, screw heads can not scratch, splints clean and clean.


Loading


Coming to the shell stage means that the hardware assembly is about to be completed. When loading the case, the device for fixing the case should be stable and effective. The core should be aligned with the handle, and no offset should occur. The secondhand should be at a safe distance from the cover. The automatic gyro does not scratch the bottom cover of the case, and the bottom cover screw is stainless. Spin into smooth seamless.


waterproof


For waterproofing, the watchmaker who has professional accomplishment and sense of responsibility in maintenance often leaves room for the waterproofing ability of the watch. Make sure the watch has as much as possible, or even slightly improves the waterproof ability.


Autobiography Inspection


Finally, the watch is placed on the autobiographer to check whether the watch can run perfectly for more than 36 hours under the condition of rotation.


Appearance Inspection of Whole Shell


The whole shell appearance inspection is the last step for the watch to be handed back to the customer. Although it will be completed soon, it is also necessary to make sure that the watch case and strap are clean, check again whether the bottom cover is tight and seamless, whether the watch ear cover is close to the watch head, whether it is safe and easy to operate by pressing the button switch, and that the needle on the top of the watch is moderately stretched, and there is no deformed ear. After the inspection, a watch with 2892 motion cores regained its vitality.