How to distinguish class A, class B and class C lock cores?

Distinguishing Methods of Class A, Class B and Class C Lock Cores

A-class lock: At present, the keys of A-class anti-theft lock on the market mainly include a one-word key and a cross key. The internal structure of Class A lock core is very simple, limited to the change of marble, and the marble grooves are few and shallow. The anti-technology opening time is 1 min, and the mutual opening rate is extremely high. The marble structure is single-row marble or cross lock.

Class B lock: The key of Class B lock is a flat key with double rows of marble grooves, which is different from Class A lock in that there are a row of irregular curved lines on the key face. There are three kinds of lock cores: computer double-row lock core, double-row crescent lock core and double-sided blade lock core. The anti-technology opening time is less than 5 minutes, and the mutual opening rate is high. The lock core can be opened in 0/minute with the powerful twisting tool/kloc.

Class C lock: the key is in the form of single-sided blade internal milling groove, external milling groove key or double row+blade. The lock core is a side column lock core. After 270 minutes' inspection by the Ministry of Public Security, it can't be opened technically, and the area mutual opening rate is zero (11 in 6 million). The marble structure is locked by double rows of blades and V-shaped side columns; If the lock core is opened with a strong twist tool, the inside of the lock core will be destroyed and locked by self-explosion, which will make it impossible to open it.

The lock core adopts a number of anti-theft technologies and a variety of special-shaped anti-pulling marbles to prevent the technology from opening. Unique marble and blade design has high safety performance for technical opening. ?

The lock core is equipped with accurate numbered marbles and special-shaped marbles. When the numbered marbles and special-shaped marbles must be pulled at the same time when the technology is opened, it will automatically lock, which makes the technology opening fail.

The lock core adopts multiple combinations of various special-shaped marbles, and at most one billion key numbers can be compiled, so as to realize zero mutual opening (11 in 6 million). The lock core is added with a lateral internal pressure side column clamping pin device, which greatly improves the ability to prevent violent twisting.