Nowadays, the security door has become the guardian of modern family security. The most important accessory of the security door is the lock core. The security door lock core is the heart of the security door. It has both anti-theft and safety performance. So today, the hardware machine's small series introduces you to the content of the anti-theft door lock core level and teaches you how to distinguish the three lock cores of ABC:

Cylinder level classification

1. Anti-theft door lock core level: The anti-theft door lock core used in the market is basically divided into three levels, namely, A-class, B-class, super B-class (also known as C-class). According to the "National Machinery Lock Standard", the anti-theft door lock core has two levels, A and B. The super B level is an enhanced version B grade developed by the entrepreneur.

Class A lock: At present, the A-level anti-theft lock key on the market mainly has a word key and a cross key. The internal structure of the A-class lock cylinder is very simple, limited to the change of the marble, and the marble groove is small and shallow. The anti-technical opening time is extremely high within 1 minute. The marble structure is a single row of marbles or a cross lock.

Class B lock: Class B lock key is a flat key, with double row of marble slots. The difference with A lock is that there is a row of curved and irregular lines on the key surface. The main types of lock cylinders are 3 types, computer double-row lock core, double-row crescent lock core, double-sided vane lock core. The anti-technical opening time is 5 minutes, and the mutual opening rate is high. With a strong twist tool, the lock cylinder can be opened in 1 minute.

Super B-class lock (C-class): The key shape is a single-sided blade inner milling slot or an outer milling slot key. The lock cylinder type is a side cylinder lock cylinder; it can not be technically opened by the Ministry of Public Security for 270 minutes, and the regional mutual opening rate is zero ( One millionth of a million). The structure of the marble is locked by the double row of blades and the V-shaped side column; if the lock cylinder is opened by a strong twisting tool, the internal core of the lock cylinder is broken, and the self-explosion is locked, resulting in failure to open.

2. Identify the level of the anti-theft door lock core: The best way to lock the anti-theft lock level is to use the key to identify, you can easily understand the level of the anti-theft lock when you look at the key!

Editor in charge: Liu Changqi