How to distinguish the brand of the lock on the security door

The anti-theft door has become the guardian of modern home security, and the most important accessory of the anti-theft door is the lock cylinder, the anti-theft door lock cylinder is the heart of the anti-theft door, which has both anti-theft and security performance.

1.Anti-theft door lock cylinder level: The anti-theft door lock cylinder used on the market is basically divided into three levels, namely A-level, B-level, and super B-level (also known as C-level).

According to the "National Mechanical Lock Standard", the anti-theft door lock cylinder has two levels, A and B, and the super B level is an enhanced version of the B level developed by the entrepreneur.

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.

2.Distinguish the level of the lock cylinder of the anti-theft door: The best way to distinguish the level of the anti-theft lock is to use the key to identify, and you can easily understand the level of the anti-theft lock by looking at the key!