Door locks on metal doors - the reliability of the whole

Installing high-quality and reliable locks on the front door determines the security of the entire structure. The most common door locks on metal doors are internal. Modern designs are made using high technology, often on individual orders. The article will help to understand the types of door locks, their device, advantages and disadvantages.

Lock on the metal door

This is a complex structure, designed for long life and requires special care, as well as any mechanism.

To open the lock you will need:

• Professional training.
• Enough time, which depends on the resistance of the lock to burglary.
• Availability of special tools. Usually, these are master keys, tools for drilling a lock at its critical points, or force opening, which leads to the deformation of elements in a protective mechanism.

The lock is not a separate device, it comes complete with a frame that can eliminate weaknesses in the structure or, due to poor installation, minimize the advantages of the lock.

Tip: For the reliability of the device installation, you should not ignore the recommendations of manufacturers. Do not buy locks at discount prices from famous brands. This may indicate that the kit does not contain the appropriate additional details.

Criteria for selecting locks

When purchasing door locks on metal doors, you must consider:

• The quality of the materials used for its manufacture.
• The durability of the product.
• Strength.
• Reliability of the locking mechanism.
• Convenience and simplicity with frequent use.

The most popular types of locks are presented in the photo.

Tip: In order for the lock to provide security for a long time, it is necessary to choose it, following the simple rule: the lock should be selected according to the purpose of the door, focusing on the class of the device's resistance to cracking.

Resistance of locks to breaking is of four classes:

• The first - These are the most simple, easily cracked locks that are used for interior doors. To open such locks is less than 5 minutes.
• Second - locks, opened for 5 to 15 minutes. They can be installed in the inner and front doors.
• Third It has enhanced protective properties, and it takes more than 15 minutes to open them.
• Fourth - the most reliable locks, opened in no less than 30 minutes. Installed in doors for rooms that require increased protection.

The price of locks for metal doors depends on the class of resistance to burglary, implying the use of highly durable materials and devices with a high level of secrecy.

Tip: When purchasing locks, preference should be given to structures made of high-strength steels, avoiding devices with details made of soft and brittle metals: brass, silumin, various plastics.

In addition to persistence, there is the secrecy of the castle. The number of possible combinations in it and the key can reach huge values.

But it is necessary to take into account that secrecy is a complex concept, which includes:

• The number of combinations.
• Protection of the structure against mechanical impact on it, from hacking with a master key.
• The probability of coincidence of keys.
• Wear resistance of the product.

There are three levels of secrecy:

• Higher. In this case, the secrecy of the castle exceeds 100,000 possible combinations. There is a protection against master keys and mechanical effects. The key profiles and pin combinations of such locks are very complex. The materials used to manufacture the devices are resistant to acid, and the assembly is performed with very high accuracy.
• Average. The number of possible combinations is from 5,000 to 5,000,000. Sometimes in designs there is no protection against the effects of master keys and mechanical effects, but a complex combination of pins is necessarily used. For the manufacture of used durable and wear-resistant materials, with an average quality of parts. Usually in such locks the locking bolts of the mechanism are of high quality, and the body and handles are made of low-grade materials.
• Low The number of possible combinations in the range from 10 to 10 000. The devices do not have protective elements from mechanical impact, protection against master keys. The location of the pins in the lock and the key profiles are quite simple. Materials for the manufacture are not taken of high wear resistance and low strength, and the quality of manufacture and assembly is not too good, which is determined even by eye.

Types of locks

The most reliable door lock for a metal door - mortise. The device is installed inside the door leaf and fixed to it. The metal door leaf is a reliable protection of the lock, hides it from prying eyes.

There is a wide variety of locks and key forms for them. But the secret mechanism for products of this type can be one of two types: cylinder and suvaldny.

The table shows the most popular types of locks and their features:

Benefits	disadvantages
Affordable cost. Low weight. Simple repair and replacement of the central device. It is enough to replace the secret mechanism in the cylinder, which transfers the turn of the key to the locking bolts. Quick installation.	The ability to knock out the cylinder, drill out, damage the larva to crack the structure.
Low cost. Easy to repair Quick do-it-yourself installation.	Minimal secrecy. Low break resistance. Not amenable to recoding. At loss of a key cylinder replacement is required.
The simplicity of the design. Standard core sizes make it easy to replace the mechanism.	Insufficient resistance to rough mechanical stress. You can knock out, drill out, and then remove the cylinder from the lock.
Different variations of shapes, sizes, angles on the disks allows you to create a large number of combinations, which makes the lock protected from opening. You can not pick a pick. The device cannot be drilled - the discs will simply rotate around the drill. No problem during operation. The lock is not clogged with dust. It is not affected by moisture, which protects the device from rust.	Great value.
At production modern technologies and more secret mechanisms of locks are used. Opening them will take at least 30 minutes, and a lot of noise is produced. High level of protection against hacking.	The locks are defenseless before the usual knocking, which requires the presence of protective covers in the set. High price.
Level locks are among the most reliable. This is ensured by the strength of the structure itself. Modern suvaldnye devices almost all mortise, without protruding parts, from the outside remains only a lock hole for the key. The lock case is strong enough, it provides reliable protection against shocks.	Relatively large key sizes. The presence of a through hole, through which sounds and air penetrate, contributes to the passage of master keys of various types and instruments for forceful breaking of the structure. Disadvantages when replacing the mechanism. If the key is lost, the entire lock must be replaced. The levers and the drive that locks the elements are always interconnected. Code elements of relatively large size, the lock does not have additional protections, which makes it relatively easy to open the device with master keys. Tip: When choosing a lock, you should pay attention to the presence of complex grooves in the levers, a system that recognizes master keys and protection against forceful hacking.
Greater reliability of the design, in which several different mechanisms are combined in one. One lock is cheaper than two single. At installation the door panel is weakened less. Robust housing requires a great force when breaking. Lock the main lock auxiliary device. Convenience and reliability in operation.	Difficulty in opening. Increased key length. Violation of the order of opening and closing the lock leads to rapid wear. The failure of one system leads to the replacement of the entire lock. The small distance between the bolts slightly reduces the resistance to cracking.
The greatest protection against hacking. Full security for home penetration. High secrecy.	High price
There are no keyholes and other attributes that may be the reasons for the autopsy. The presence of identification elements does not allow opening the lock without using special equipment. Do not worry about losing the key, the electronics easily recodes when the control device is lost. The electric lock can be opened remotely, which greatly simplifies its operation.	Dependence on the availability of electricity and the need for additional power sources. Susceptibility to voltage drops, which requires the installation of a stabilizer. Increased sensitivity to moisture that can lead to the failure of structural elements. Tip: It is not necessary to use an electronic fingerprint lock for the entrance metal door.

Reasons for replacing the lock

The most common cases for replacing locks in metal doors are:

• Purchase of a new metal door. The lock is not included in the kit to the canvas; it is selected separately.
• Loss of keys. This is the most common reason. Even with a spare key, or duplicate manufacturing, there remains the risk of the original falling into unreliable hands.
• Replacing a damaged mechanism. Poor quality parts, rough operation of the device can cause breakdowns of the larvae, lead to deformation of the crossbars. The use of such locks is unsafe.

• The unreliability of the castle. This may be a mistake with the choice of its design, the choice of a more perfect model.
• Breaking into. In such cases, it may even be necessary to replace the door itself.

• Sale of apartments to new owners.

How to correctly change the locks to metal doors of any type, shows the video in this article.

Cylinder Lock Replacement

Cylinder замок – это самое простое и распространенное устройство для запирания дверей.

Instructions for replacing structures on a metal door offers:

• Remove the armor plate from the back of the door.
• Open the key lock.
• Unscrew the plate from the end of the metal door.
• Lock the key with a key that will release the crossbars.
• Unscrew the screw in the center of the lock and remove the larva, turning it slightly.
• Insert a new secret and the above described manipulations in the reverse order.

Replacement of the level lock

Domestic manufacturers produce cheaper products, but the lock is replaced completely. Foreign companies offer an alternative option: recoding suvalds for a new core. In this case, a new part is purchased with the keys and inserted in place of the old item.

Tip: Spare parts should be used by the same company as the primary lock.

To change the level lock, you must:

• Open the door.
• Remove the locking bolt.
• Get key out of the keyhole.
• Remove the pad on the lock case.
• Remove armored plate.
• Remove the handle and bolt for ease of operation.
• Unscrew the screws at the end of the door.
• Remove the lock.
• Carefully disassemble it and replace the larva.
• Insert a new lock or old, but with a different larva, in place.
• All operations are performed in the reverse order.

Replacing the lock with sliding bolts

The hardest thing is to change the lock with sliding bolts. Features of the mechanism - side girders and additional elements from below and above, which completely block the web in the opening, are put out from the canvas.

It is possible to disassemble and replace such a construction only by removing the door from the hinges, and dismantling the canvas completely.

Wherein:

• Initially, the process is the same as when replacing the level lock.
• Additionally, the lower and upper girders must be pulled. To do this, use a wrench to loosen the thrust and disconnect from the lock.

Tip: You can not make a very large effort, because of this, you can bend the beams, and disrupt the structure inside the metal door.

• After replacing all the necessary parts, they are installed in the place of draft, and the lock is fixed in the door.

Having become acquainted with what kind of door locks for metal doors are, everyone chooses a device that fits best. But you should not buy too cheap products made by companies that do not have positive feedback on their products.