Do you know the level of lock cylinder

At present, there are three levels of lock cylinders that can be seen in the market.


1. Class A: at present, class a anti-theft lock keys on the market mainly include flat key and cross key. The internal structure of A-level lock cylinder is very simple, which is limited to the change of marbles, and the marbles slots are few and shallow. The anti technical opening time is within 1 minute, and the mutual opening rate is very high. The structure of marbles is single row marbles or cross lock.


2. Grade B: the key is a flat key with double rows of marble slots. The difference from grade a lock is that there is a row of crooked and irregular lines on the key surface. There are three main types of lock cylinders, including computer double row lock cylinder, double row crescent lock cylinder and double-sided blade lock cylinder. The anti technical opening time is within 5 minutes.


3. Grade C (super grade B): the key shape is single-sided blade inner milling slot, outer milling slot key or double row + blade. The type of lock cylinder is side column lock cylinder, which cannot be technically opened after 270 minutes of detection by the Ministry of public security, and the mutual opening rate of areas is zero. The billiard structure is double row blades and V-shaped side columns for locking; If the lock cylinder is opened with a strong twisting tool, the interior of the lock cylinder will be damaged, self explosion and locking, resulting in failure to open.


We have comprehensively explained the classification of locks from the aspects of the function, material and anti-theft level of locks, hoping to help friends in need. This is also my little wish to write this article.