Whether it is a quartz watch, also what is a calendar box, and watches dial needle presence of taboos, some advice to my friend who is going to buy watches, mechanical watches, keep the simple method of the precision when the clocks and watches, remove the double disc methods and tools, balance spring torque cone and sesame how grinding to watch chain, scratches on the casing and strap?
Is a mechanical watch, there are dial needle and needle mechanism.
Dial hand is used to adjust the time or date, watch running time must also drive the pointer to accurately indicate the time.
In the rotation table to pick the needle, will feel a tightness, the requirement is not too tight, can not be too loose.
General new watches, may feel slightly tighter, and old watches (especially mechanical watches), are often relatively loose.
Watch inside the needle and needle mechanism, mainly there is a gear, usually is a wheel or is called “small center” wheel, specific to see the center of the watch is the center drive or partial center drive.
The gear will be set on the central wheel shaft, which will have a tip tilt Angle, and the small center of the wheel tube on the corresponding position on each side of a groove, that is, they work with the elastic over-win fit.
Partial center drive of the watch machine center, is the wheel on the wheel piece and the elastic match of the gear tube of the wheel shaft.
(See photo) The tightness of this place, which determines the tightness of the needle, is most likely to wear in this position.
Especially mechanical watches, often need to dial the needle, or proofread the calendar, the result of frequent dial will aggravate the wear of the wheel.
If the needle feels very loose, it is likely that there will be a watch “without a needle” failure.
The so-called watch “without a needle”, refers to the second hand of the watch, and the minute hand does not go or when it does not go, that is, “lost”.
Especially with the calendar and calendar watch, every day to jump calendar, the machine center “load” will gradually become larger, if the needle loose, it is more likely to appear “lost” problem, as the watch slow or simply, the minute hand does not walk.
Old mechanical watches, this place is the most prone to problems, mainly caused by wear and tear in long-term use.
When repairing, they are pressed again in the groove of the small center, and the off-center wheel pieces should be trimmed to restore them to a proper elastic fit.
Dial needle also cannot too tight, however, if the dial needle felt very tight, the bad influence to the watch will have the following: (1) directly on the dial needle tooth damage, easy to cause lying round straight teeth, and if they cannot forgive, across the wheel gear and shaft of wear, and even cause tooth broken, mechanical watches, this is also the most prone to failure;
(2) will lead to the increase of the error of the watch, in the case of tight needle, the huge moment when the needle will be attached to the transmission gear train, if it is clockwise, watch the second hand will quickly go fast;
When the hand is moved counterclockwise, the second hand will stop or go backwards (in the case of the watch without pulling the handle).
If you find your watch suddenly feel unusually hard to dial the needle, it is recommended not to dial, which needs to be sent to the watch repair shop in time to do a repair, so as not to damage the parts.
Therefore, watch the normal needle tightness, should be not loose is not tight, loose can not be loose to feel no “strength” when the needle;
Not so tight that it feels like it’s hard to pull the needle.
In fact, it is better to be moderately tight, because there is a lot of wear in this area, even when you reverse the hand, it is normal for the second hand to stop and go back for a short time.
Moreover, in addition to the tightness, the feeling of the needle should be smooth and smooth, without the phenomenon of needling.
Often after maintenance of the watch, prone to this situation.
In general, the watch needle is inverted can be, if there is a large wear of the needle system gear, gear meshing is bad, there will be in a certain direction when the needle, there is not smooth and the top teeth or sliding teeth abnormal feeling.
Watch is a precision small mechanical device, even if there is a trace of wear, will affect the accuracy of the watch, to say the wear of the watch, the main focus is on the winding and needle mechanism.
Therefore, from the point of view of maintenance, or should try to reduce the number of needle, especially to avoid the watch to do a long time to keep the needle.
