China Cylinder Lock Manufacturers and Suppliers - Mingyi Light

Shell
This is the fixed body of the cylinder.

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Plug
located in the shell, the plug is the moving part of the cylinder into which the key is inserted to lock or unlock the door.

Pins and Drivers
They are arranged at different heights and are the main security component of the lock cylinder. When the right key is inserted in the cylinder, the pins and drivers line up, allowing the locking mechanism to move.

Springs
Springs are compression components located between the pins and drivers. They maintain constant pressure on the pins, pushing them down into the holes in the cylinder body. The springs contribute to the functionality and strength of the lock cylinder.

Plugs and Screws
The plugs cover the ends of the lock cylinder and can be removed to gain access to the pins and internal mechanism. Screws are used to secure the lock cylinder to the lock case and door.

Remove the Flat Screw Under the Latch
Prop open the door as you change the lock. Turn the screw under the door latch counterclockwise with a flathead screwdriver and remove it.

Turn the Key a Quarter of the Way
Insert the key into the keyhole and turn it slightly so that it's in the open position. This will hide the latch in the internal components of the lock and allow you to slide it out.

Pull On the Key While Pushing on the Other Side of the Lock
Keep the key turned while you push on the lock from the other side of the door. If done correctly, the interchangeable lock cylinder should come out.

Screw the Flat Screw Back In
Thread the screw into the hole with your fingers, then use a flathead screwdriver to tighten it. Continue turning it until it runs flush with the side of your door.

Test Your Key to Make Sure That it Unlocks Your Door
Keep the door open as you test it. If it doesn't work, try dissembling and reinstalling the lock cylinder or call a locksmith to see if they can replace it for you.

Unscrew and Remove the Faceplate Over the Latch
Use a doorstop to prop the door open while you’re working. Find the faceplate on the thin part of the door and use a Phillips head screwdriver to remove all the screws in it. Once the screws are out, pop the faceplate off the door.

Loosen the Set Screw Near the Lock Itself
The set screw will be the screw closest to the lock cylinder on the outside of the door. Use a Phillips head screwdriver to turn the set screw counterclockwise until you loosen it.

Insert a Key Into the Lock and Turn it Clockwise to Unscrew it
Use a different key than the one that unlocks the door so that you can use it as a wrench. Insert the mismatching key into the keyhole and turn it counterclockwise to loosen the cylinder. When the cylinder is loose enough, it should easily come out of the hole in the door.

Thread a New Lock Cylinder Into the Hole
Put the new lock cylinder into the hole with the keyhole facing outward. Start threading the new cylinder by turning it clockwise in the hole.

Insert a Mismatching Key Into the Lock and Turn it Clockwise
Again, use a key that isn’t made for the lock so that it catches and can be used as a wrench. Stop turning the cylinder when you feel resistance and the keyhole is on the bottom of the lock.

Re-Tighten the Set Screw
Turn the set screw clockwise to set the new lock cylinder in place. Once the set screw is tight, you should no longer be able to rotate the lock cylinder.

Screw the Faceplate Back on and Test the Lock
Fit the faceplate over the latch and line up the holes in the latch with the holes in the door. Use a screwdriver to secure the screws back in their holes. Use the correct key on the new lock to make sure that you installed it correctly and the door locks.

Speaking of lock cylinder, we have to mention the lock cylinder level. Various media in the promotion of consumer awareness of security precautions, are stressed that we must buy C lock cylinder locks, that what kind of lock cylinder is C lock cylinder? Market publicity in the emergence of super B, super C and what is it?

In fact, the current national standards on the level of the lock cylinder has been A grade, B grade and C grade division. China’s Ministry of Public Security has been officially released in January 29, , “GA / T 73- Mechanical Anti-theft Lock Standard”, which includes the safety level of the insert lock, from , A, B two levels increased to A, B, C three levels, at the same time gives A, B, C three levels of locks have a core with the net working time of the anti-destructive.

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Grade A locks

Currently on the market A grade anti-theft lock key mainly has a word key and cross key.A grade lock cylinder internal structure is very simple, basically a single structure, limited to the change of the bullet, bullet groove is less and shallow. The spring structure is a single row of spring or cross lock.

Anti-technical opening time: t<1 minute, very high mutual opening rate. (Some professionals have also tested that the technical unlocking time of A-grade locks is within 30 seconds.)

Grade B locks

Grade B locks are keyed by a flat key with a double row of bullet slots, which differs from Grade A locks in that the key face has an extra row of curved and irregular lines. The main type of lock cylinder is 3 kinds, computer double rows of lock cylinder, double rows of crescent moon lock cylinder, double-sided blade lock cylinder. Manufacturing precision, can reach the national standard of the highest level of anti-theft requirements, there is a certain anti-technical open ability, but these locks are old products, locksmiths as well as thieves have been studied thoroughly, basically can be opened within a few minutes.

Anti-technical opening time: 1 minute

Note: According to relevant surveys, 90% of thieves will give up voluntarily if they can’t open the door lock within 1 minute, so although B-grade locks are not the highest grade, the security is much higher than A-grade locks.

Grade C locks

C grade locks key is used in the double row, computer composite curve slot patent key, the most complex structure, the use of multi-technology combination, and many locks have their own unique patents, anti-technology open as well as the ability to open with violence is very strong, is currently the highest coefficient of security of the lock cylinder, in addition to non-violent damage, otherwise the possibility of theft is very small, will deter thieves.

Anti-technical opening time: t>10 minutes

Super B Grade

The national standard in , to A, B, C grade from the lock body structure, mechanical strength and other aspects of the detailed specification, the development of national standards tend to lag behind the development of the industry, so the lock enterprise itself will be developed far higher than the national standard of the enterprise standard, as shown in the chart below, the chart shows the national standard in was not released before the lock enterprise is currently agreed to prevent the technical opening time specification table.

In this table, we can see that the enterprise standard has set up a new level, that is, “super B level”, anti-technical opening time ≤ 270 minutes, much higher than the national standard C level.

In , the new standard had not yet been implemented, and the standard had already failed to keep up with the development of technology, and the term “Super B” appeared on the market during this period. At this stage, some lock manufacturers have produced lock cylinders that have completely exceeded the standard of Grade B locks, so they negotiated to name their lock cylinders “Super Grade B”, meaning “beyond the grade of Grade B lock cylinders”. But the newborn “super B grade” does not convince users, so the development of the “enterprise standard”, such as “anti-technical opening time of not less than 270 minutes” and so on, such an endorsement in the This endorsement in the product publicity also has a clear comparison.

However, in , the new standard was promulgated, the C-class lock cylinder has a criterion, but for the anti-technical opening time of this dimension, the standard is only 10 minutes, or far lower than the market has generally claimed that the “Super B” of 270 minutes, so many manufacturers are still “Super B” as a promotional point. So many manufacturers still use “Super B” as a publicity point.

However, to a certain extent, the new standard also has the purpose of regulating the name, now more and more brands, began to say that their own smart lock cylinder for the C level, the degree of replacement of the “super B” statement. There are also some brands with more stringent parameters, will also call themselves “super C”. Consumers buy, it is recommended that in addition to focusing on the grade of the lock cylinder, to consult the specific technical parameters of the lock cylinder, such as: anti-technical open time, mutual open rate, etc., so that they have more peace of mind.

In addition, because the lock cylinder and the key is a pair, so in addition to some technical parameters advertised by the manufacturer, we can also correspond to the key structure of the smart lock, to initially identify the lock belongs to which level. Similarly, the vast majority of smart locks are equipped with emergency spare key, can also be based on the principle described above to discern the level of the lock cylinder.

A few suggestions for consumers:

In any case, the lock to prevent the gentleman not to prevent the villain, there is no unsolvable lock in the world. Consumers in the purchase of smart locks, must try to buy a higher level of security locks, to minimise losses. In addition, we should also pay attention to the following points to improve the home security factor.

➊, the door inside the reverse lock. Because it is a physical reverse collar, so that even if there is a steel key outside the door can not be opened.

❷, close the thief “green channel”. When you go out and go downstairs, even if it’s only for a short while, remember to lock the door. Before going to bed, should check the windows and doors, to avoid the balcony, the vent has become a thief’s green channel.

❸ Promptly clean up posters or small adverts outside your home. Long-term unused empty house is the thief’s most ideal target, if there is a small advertisement pile up in front of the home, the thief is easy to judge the homeowner is not at home for a long time. If you are travelling for a long time, ask your neighbours or security guards to help you remove the advertisements in front of your home.

❹ Deploy relevant smart home devices in your home, such as infrared sensing products and magnetic door and window sensors. In this way, once the intrusion is detected, it will be the first time to send an alarm message, which greatly enhances the home security factor.

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