-
Anonymous users2024-01-24It's really hard to distinguish between this, because even B-level is divided into many kinds, and if it's the kind of pure double-row marble, it can also be called B-class, but it can't play an anti-theft role in real life. What's more, developers of new communities will generally only choose double-row marbles if they don't care about the cost. The normal vast majority of them choose A-level locks (all understand, the cost factor).
If you really don't confirm it, you can send me a private message, send me a picture of the key, and I'll help you identify it.
-
Anonymous users2024-01-23Now the new community anti-theft door lock should be B-level, and I will give you a detailed description of the characteristics of A-level locks, B-level locks, and C-level locks:
Class A lock: At present, the Class A anti-theft lock key on the market mainly includes a word key and a cross key. The internal structure of the A-grade lock cylinder is very simple, limited to the variation of the pin, and the marble slot is few and shallow.
The anti-technical opening time is within 1 minute, and the mutual opening rate is extremely high. The marble structure is a single row of marbles or cross locks.
Class B lock: The Class B lock key is a flat key, with a double row of slots, which is different from the Class A lock in that there is an extra row of curved and irregular lines on the key surface. There are 3 main types of lock cylinders, computer double-row lock cylinders, double-row crescent lock cylinders, and double-sided blade lock cylinders.
The anti-technical opening time is within 5 minutes, and the mutual opening rate is high. With the help of a strong twist tool, the lock cylinder can be opened in less than 1 minute.
Super B-level lock (C-level): the key shape is a single-sided blade inner milling groove or external milling groove key, and the lock cylinder type is a side post lock cylinder; After being tested by the Ministry of Public Security, it could not be technically opened for 270 minutes, and the mutual opening rate of the area was zero (1 in 16 million). The bullet structure is a double-row blade with V-shaped side post locking; If the lock cylinder is opened with a strong twist tool, the inside of the lock cylinder will be damaged, and it will self-detonate and lock, resulting in the inability to open.
That's all there is to say about this issue, for your reference! It is recommended that you also use a Class B lock for the security door in your home, after all, security is priceless.
It is usually believed that there are three types of lock cylinders: A, B, and C, but this is not the case. According to the provisions of GA T73-1994 "Mechanical Anti-theft Lock": Anti-theft locks are divided into three levels: A, B, and super B. The country has not yet formulated a standard, and the C-level lock on the market is actually a super B-level blade lock, and the C-level lock should be a concept set by the enterprise. >>>More
Hello, the current lock cylinder level on the market is divided into three levels, its security level according to the unlocking time from low to high in order to arrange for a level - B - super B level, from the key to initially distinguish which level the lock cylinder is, a level of lock cylinder key each side of only a row of tooth grooves, B level two sides of two rows of tooth grooves, super B level of tooth grooves with A level and B level has a qualitative improvement, super B level lock cylinder in addition to the bullet blade, this is a new anti-theft technology. The key tooth grooves are usually one or more serpentine grooves. >>>More
1. What is a Class B anti-theft lock?
Understand that it is not so easy for B-class locks. In other words, the more complex the cylinder, the longer it will take to unlock. Most of the home security doors on the market are Class B locks. >>>More
In terms of level, grade C is better.
If it's a miscellaneous B rank or a miscellaneous C grade, you don't dare to compliment. >>>More
Hello, now the lock cylinder, B-level is not very safe, super B-level or C-level is recommended. The price is around 200-300. You can contact the local regular lock picking and changing company (you can call 110 to consult) for replacement. It's convenient and safe. >>>More