One, Classification of Anti-Theft Door Lock Core Grade
Anti-theft door lock grades include three levels: Class A anti-theft door lock, Class B anti-theft door lock, and Super Class B anti-theft door lock (Class C).
1、Class A anti-theft door lock core
A-grade anti-theft lock cylinders are relatively common anti-theft lock cylinders, primarily featuring a one-way key and a cross-shaped key. Their internal structure is relatively simple, and variations mainly lie in the design of the shims. These lock cylinders exhibit a very high compatibility rate. The shims can be arranged in a single row or a cross pattern.
2、Grade B anti-theft door lock core
The keys for Grade B anti-theft door locks primarily consist of flat keys and double-row button slots. The key difference from Grade A locks is the addition of multiple irregular, curved lines. The door locks are categorized into three types: computer-style double-row locks, crescent-shaped double-row locks, and double-sided leaf locks. This Grade B anti-theft lock is a popular choice among many users.
3、High-security door lock cylinder (C-class)
The security level of this high-grade anti-theft door lock is relatively high. It features both internal and external milling slots, and uses a side-bar lock mechanism. The internal structure also incorporates a V-shaped side bar locking system for double-row leaf locks, which significantly enhances its anti-theft performance. However, forced opening with tools will damage the internal structure, leading to a self-locking mechanism and preventing opening. This type of anti-theft door lock is commonly used on villa doors.
Two. Which level of anti-theft lock is the best?
Excellent Class B anti-theft door lock (Class C lock).
1、Grade A lock
Currently, A-grade locks with one-way and cross keys have a relatively simple internal structure for the lock core, limited to variations in the pins. These pins have fewer and shallower slots, resulting in a security level that can be overcome within 1 minute, and a high rate of key duplication.
2、Level B lock
B-grade lock keys are a type of flat key. The key face has an additional row of curved, irregular lines, which distinguishes them from A-grade lock keys. Lock core types include: computer double-row lock core, crescent-shaped double-row lock core, and double-sided leaf lock core.
3、Super B-grade locks (C-grade locks)
The locking mechanism features a single-sided leaf with a milled slot, and the locking type is a side bolt lock. It has undergone 270-minute testing by the Public Security Bureau and cannot be technically opened. The regional inter-opening rate is zero. The spring mechanism consists of two rows of leaves with V-shaped side bolts for locking.