Lock cylinder grades in China, Europe and America
The security door is an important line of defense against theft, as its core, the level of protection of the security door lock core is worth our attention.
At present, the level of security door lock cylinder in China can be divided into a-class, b-class and super b-class security door lock cylinder (also called c-class security door lock cylinder) three levels, generally considered super b-class security performance is the best, so the price of this security door lock cylinder is also the highest. In addition to the security level, we should also pay attention to the security door lock cylinder type, size and other factors when buying a security door lock cylinder.There are several grades of security door lock cylinders, typically designated by ANSI (American National Standards Institute) or BHMA (Builders These grades range from Grade 1 (highest level of security) to Grade 3 (lowest level of security).
Security door lock cylinder grade distinction：
Security door lock cylinder specifications list
Anti-theft door lock cylinder level
Definition
Anti-theft performance
Key shape
Grade A lock cylinder
Prevent technical unlocking time of not less than 1 minute, and prevent destructive opening time of not less than 15 minutes.
Anti-technical opening time within 1 minute, very high mutual opening rate.
Crossed flat type or crescent type with convex keyway key, with one row of concave keys on one or both sides.
Grade B lock cylinder
Prevent technical unlocking time not less than 5 minutes, prevent impact opening time not less than 30 minutes
Anti-technical opening time within 5 minutes, high mutual opening rate. Can be opened within 1 minute with strong twisting tools.
Flat type or crescent type with two rows of concave keys on one or both sides or cylindrical type with multiple concave keyholes.
Super Grade B / Grade C lock cylinder
Technical opening time of more than 270 minutes.
Tool opening time in 270 minutes or more can not even open, mutual opening rate is zero (16 millionths)
Flat type with two rows of concave plus S-shaped keyway on one or both sides, or inner and outer double serpentine inner iron groove structure.
tips : Security door lock cylinder level can be divided into A-class lock cylinder, B-class lock cylinder and super b-class security door lock cylinder (also known as C-class lock) three, generally considered C-class security door lock cylinder the highest anti-theft performance.
security door lock cylinder size table:
Anti-theft door lock cylinder size table
Length
Inside the door + outside the door
Inside the door + outside the door
Inside the door + outside the door
Inside the door + outside the door
Inside the door + outside the door
65mm
32.5+32.5
70mm
32.5+37.5
35+35
75mm
32.5+42.5
37.5+37.5
80mm
32.5+47.5
37.5+42.5
40+40
85mm
32.5+52.5
3止.5+47.5
42. 5+42.5
90mm
32.5+57.5
37.5+52.5
40+50
45+45
42.5+47.5
95mm
32.5+57.5
37.5+52.5
42.5+52.5
47.5+47.5
100mm
32.5+67.5
37.5+62.5
42.5+57.5
50+50
105mm
32.5+72.5
37.5+67.5
42. 5+62. 5
52.5+52.5
47.5+57.5
110mm
32.5+77.5
37.5+72.5
42.5+67.5
47.5+62.5
52.5+57.7
115mm
32.5+82.8
120mm
32.5+87.8
Anti-theft door lock cylinder size table
Length
Inside the door + outside the door
Inside the door + outside the door
Inside the door + outside the door
Inside the door + outside the door
Inside the door + outside the door
65mm
32.5+32.5
70mm
32.5+37.5
35+35
75mm
32.5+42.5
37.5+37.5
80mm
32.5+47.5
37.5+42.5
40+40
85mm
32.5+52.5
3止.5+47.5
42. 5+42.5
90mm
32.5+57.5
37.5+52.5
40+50
45+45
42.5+47.5
95mm
32.5+57.5
37.5+52.5
42.5+52.5
47.5+47.5
100mm
32.5+67.5
37.5+62.5
42.5+57.5
50+50
105mm
32.5+72.5
37.5+67.5
42. 5+62. 5
52.5+52.5
47.5+57.5
110mm
32.5+77.5
37.5+72.5
42.5+67.5
47.5+62.5
52.5+57.7
115mm
32.5+82.8
120mm
32.5+87.8
useluck door is a first-class security door manufacturer in China, we not only have a large number of standard size security doors, but also can provide customers with various customized doors. For example, unequal double doors, cast aluminum doors, net doors
