Interior door lock cylinder. How to repair a door lock

Buy in the online store "ZamkiTut" mortise locks for interior doors at affordable prices.

Any door of your house or apartment should be tightly closed. Mortise locks, which you can buy in our store, are mounted inside the leaf of an interior or front door. We have selected locks of exceptionally high security class for you. The interior mortise lock is great for installation on a door of one type or another.

The price of a lock mechanism depends on its design. The versatility of the models is confirmed by the fact that the locks can be installed on any door leaf made of plastic, wood or metal.

Main advantages

High quality, reliability, reasonable cost and, most importantly, ease of installation and operation. In order to independently mount the lock in the door leaf, it is enough to make holes using a drill or a grinder. Next, install the lock and attach the handle to it. On the other hand, even a high-quality lock can give slack if it was installed by unskilled specialists.

Other benefits:

• original appearance;
• protection from external negative factors, which affects the durability of the structure;
• adequate prices.

The lock is a part of the door that protects the room from outside intrusion. Door locks require constant monitoring and maintenance. However, even with timely care of the device, various malfunctions may occur, which can be fixed on your own. What to do if the door lock is broken? A detailed answer to this question can be found by reading this article.

If the front door lock is broken

• level. The device works by placing metal plates, called levers, in a certain order;

• code. Most often used for entrance doors, as well as office and utility rooms.

The first thing to do when the lock breaks is to find out what type of device is installed on the front door.

Typical breakdowns and how to fix them

Let's take a closer look at what to do if the front door lock is broken. Among the most common breakdowns are:

1. the tongue of the locking mechanism is not included in the reciprocal bar. Such a malfunction of the door lock can occur for several reasons:
   • distortion of the door leaf;
   • skewed door frame;
   • blocking the mechanism with a patch plate of the lock;
   • loosening and loosening of the locking device.

• fix all fasteners with a screwdriver;
• straighten the door and/or frame. Editing the door is due to the adjustment of the hinges. If the problem is in the door frame, then reinstalling the striker in the right place is required;
• if the tongue is blocked by a patch plate, then the lock must be disassembled, the position of the locking device corrected and the plate replaced.

All of the above works are carried out without the involvement of specialists.

1. the door is difficult to open. Repair of the front door lock with this malfunction consists in adjusting the door leaf and the lock;
2. jamming the door lock. The key is poorly inserted and / or difficult to turn. This failure most often occurs due to clogging of the mechanism. To fix the problem, you need to:
   • carefully disassemble the mechanism;
   • clean all internal elements. Use a stiff, dry brush to clean small parts. Larger parts are wiped with a rag;
   • lubricate the device;
   • assemble the mechanism and carry out several opening cycles for a systematic distribution of lubricant.

1. jamming of the locking device. This problem is the most serious. To fix it, you will need to replace the secret part of the lock.

Replacing the lever lock

Many lever locks can be reprogrammed by the user. The reprogramming process consists in changing one or more lever plates. If the locking mechanism has such a function, then it is necessary:

• buy a new set of levers. New keys are included with the kit;

• sort plates by identity;
• for the convenience of further installation, mark each pair of levers;
• install a deadbolt stand in the lock body;
• install levers according to the scheme that is attached to the kit or by selection, based on the free play of the key;

• assemble the lock and check its performance.

The process of replacing the lever lock plates is discussed in more detail in the video.

Replacing the cylinder lock cylinder

How to fix a cylinder type door lock if necessary? This will require:

• new secret part of the locking mechanism. To choose the right lock cylinder, it is recommended to first disassemble the device and measure the parameters of the central part. The easiest way is to go to a specialized store with the cylinder removed, where the sellers will independently select the desired device;

• crosshead screwdriver.

Do-it-yourself lock repair, which consists in replacing the cylinder, is carried out according to the following scheme:

1. on the end side of the door, at the location of the lock bar, there is a bolt that fixes the secret part of the mechanism. In order to remove the mask from the lock, it is necessary to loosen this lock with a screwdriver;

1. after loosening the fasteners, the cylinder should easily exit the housing;

If the cylinder cannot be removed from the body, then insert the key, turn it half a turn and pull it slightly towards you.

1. measure and purchase a new cylinder and a set of keys, which is attached to the secret part;

1. insert the cylinder into place and fix it with a fixing bolt;

1. check the operation of the lock.

Repair of an overhead lock also depends on the type of device and is fully consistent with the above schemes.

Code lock repair

To repair the code lock, in various situations, you must be guided by the diagrams presented above. Reprogramming of a mechanical device is carried out according to the following scheme:

1. the lock is removed from the door and disassembled. For it is enough to dismantle the panel of buttons;
2. under each button there is a plate that activates the locking mechanism;
3. plates, which are directed into the lock with an oblique part, are active;
4. to change the code, you need to turn the active plates to the edges of the lock, and those that will take part in the code combination to the center of the device.

1. collect the lock and install it on the front door.

Electronic locks are recoded without removing the device using the lock control panel or a special key included in the kit.

Breakdowns of locks of interroom doors and ways of their elimination

Broken interior door lock? The first thing to do is to identify the cause of the breakdown. The most common problems include:

1. falling of the tongue of the locking device. Such a breakdown is most often caused by a spring holding the tongue. To repair the interior lock, you need:
   • dismantle the lock;
   • change the spring
   • assemble the mechanism.

All work can be carried out without removing the lock from the door.

1. repair of the lock handle due to loosening of the device is carried out using a screwdriver of the required diameter. Before fastening, it is recommended to clean and lubricate the locking mechanism;
2. jamming of the fixing latch. How to fix the lock on the door in a similar situation? The causes of the malfunction may be:
   • displacement of the internal elements of the device. The problem is fixed by parsing the lock and editing the displaced elements. In some cases, they may need to be replaced;
   • deformation and / or natural wear of locking mechanisms, cracking. To fix the problem, replacement of unusable elements is required. To make a replacement, it is recommended to contact the store, where experienced employees will help you select the components.
3. if a lock with a key is installed on the interior door, you should read above how to repair such a device.

In most cases, repairing locks does not take much time and does not require special knowledge and skills. In order for the locking device to serve for a long period of time and not break, it is necessary to constantly take care of it, cleaning the locking mechanism from dirt and dust and lubricating it.

There are many types of locks on the market of locking mechanisms: lever, crossbar, electronic. A common model is a mortise door lock with a cylindrical mechanism, due to its high degree of security, maintainability and affordable price.

What is a cylinder lock, types of structure

According to the GOST standard, a cylinder lock is: “a mechanism that moves and fixes the lock bolt in working positions and ensures the secrecy of the lock through the secrecy mechanism, i.e. a set of certain combinations of pins (plates, disks) corresponding to their own key.

These mechanisms take different forms:

• Cylinder.
• A circle.
• A drop.
• Triangle.

Cylinders with a European standard mechanism are presented on the door fittings market: they have a certain size and are made of a brass profile. Cases are made under them.

The cylinder mechanism is of two types:

• pin.
• Disk.

Pin cylinder lock device

A pin lock, a mortise cylinder (larva, snail) is a mechanism based on a core with a connector. It has code channels with code pins (their height determines the number of slots on the key) and a spring that pushes the code pins out of the channel. The code pins are in a profile, thanks to which they do not fly out. There are also support pins.

When the key enters the hole, each slot corresponds to a code pin, which is recessed to a certain depth (height). When unlocked, the code and support pins become exactly on the line between the body and the core, and it (the core) turns easily. In this case, the code elements remain in the core, the support elements with springs remain in the housing. That's the whole principle of work.

The shape of the cylinder (larva) adopted by the European standard is called: DIN-standard mechanism.

Pin cylinder lock details:

• The case is the outer part of the castle, in which all the details are located.
• The key is an independent unlocking part, with the help of which the secret is revealed when the leash is turned.
• Cylinder or rotor - a replaceable part of a lock with a connector. It has pins.
• Code pins or pins are details of the locking mechanism.
• Locking pins or pins - together with the code pins block the rotor.
• Return springs - with their help, the pins are blocked.
• Leash - with its help the bolt moves.

Disc cylinder lock device

A door disk lock is a type of cylinder device, the mechanism of which is represented by a set of disks. Each disc has a uniquely shaped cutout. Corresponding slots are made on the key.

When unlocked, the discs of the mechanism move deeper towards the core. If the key fits, it turns easily. The secret of the lock places the discs at a certain angle, their recesses create a channel with balance - turn and the bolt moves.

The key is a sawn rod with slots, it is also called a semicircular key.

Padlocks cylinder with such a mechanism are less susceptible to freezing. A mortise disc lock is not recommended for outdoor installation. They are suitable for canvas with a large load. Suitable for entrance and interior doors made of metal, wood, plastic, glass.

Types of cylinder mechanism

There are several classifications according to different criteria.

By location on the canvas:

• Consignment note - has one connector. On the other side is a handle.
• Door mortise lock - its connector is through, that is, the key can be used from both sides. The cylinders of this lock are of two types: key + key, key + handle. The second type (with handles) is more convenient, but the first type is safer: if you insert a key into the slot from the inside, the lock cannot be opened from the outside.

In addition to these characteristics, there are cylinders of different lengths, the size depends on the thickness of the canvas. When buying, you must consider the size or you may encounter such problems:

• A small cylinder - will be located deep in the body. This is ugly and inconvenient - the door will either be difficult to open, because the key will not reach the device mechanism.
• Large cylinder - if it protrudes beyond the edges of the connector, this will make it easier for attackers to break it. If armor plates are installed in the body, the cylinder will not fit into the slot.

Cylinders are classified according to their location on the body: central and extreme.

Cylinder latch locks

The dead lock with a latch is functional, convenient in use.

Cylinder locks with latch latches close under mechanical action. It is an auxiliary element of the locking mechanism. The latch is available with and without a tongue lock, with one or two handles. Such locks are often used in residential and industrial premises.

False handles are used for entrance and interior doors. There is no functional feature in it, it is rather an element of decor. The convenience is that when changing the interior, in order for the locking device to fit into the image, it is enough to choose the handle according to the style.

Handles for entrance doors are resistant to external influences, made of durable materials (when compared with interior doors).

By type of pressing the handle are:

• Push (for entrance doors).
• Swivel (for interior doors).

The push handle is also suitable for interior structures. The choice depends on the preferences of the buyer.

How to choose a cylinder lock

In addition to such a criterion as the size of the larva, when choosing, it is necessary to pay attention to such characteristics:

• Protection - you need to ask the sales assistant how durable the material was used to make the lock. The difficulty of opening when bumping, drilling, selecting a key depends on this.
• Quality - how precisely the mechanism is complex, whether there have been cases of breakdown, how repairable a mortise lock with a latch is.
• Additional functionality: this is recoding, installing a gear mechanism, "anti-panic" and others.

The safety of the premises depends on how conscientiously the manufacturer adheres to these characteristics. The more reliable the device, the higher, as a rule, its cost will be.

A cylinder mortise lock with a latch is convenient because, if necessary, it is not necessary to dismantle the entire device - it is enough to replace the larva. You can replace the lock cylinder yourself by following the proposed algorithm:

• Open the door, at the end find a screw on the bar near the cylinder.
• Unscrew the screw.
• If the locks are with handles, the cylinder can be easily reached, if without, you need to insert the key into the slot, turn it counterclockwise until it stops and pull it towards you.
• Then move the key and handle slightly in the opposite direction so that the lever goes down - then the cylinder will easily come out of the body.
• The new cylinder will be placed into the mechanism by the handle, or by a key inserted into it. Monitor the position of the lever - it must be completely secret.
• Try to close the mortise lock with a latch by moving the front and back so that it closes freely.
• Install the screw.
• Check work.

To replace the overhead lock cylinder, the case must be removed from the canvas. Then everything is the same as with the previous one - find the screw, get the old cylinder and replace it with a new mechanism.

How cylinder devices are hacked

Unfortunately, the mortise lock cylinder is at the same time its weakest part - attackers use many methods to break the mechanism. Here is some of them:

• Hacking with a master key: picking up a key to a lock with a modern mechanism is almost impossible, but thieves use special lockpicks, plus technical devices, such as a bumping machine. True, this option may also be ineffective: the technology provides for a complex secret: grooves, grooves. Therefore, to open a mortise mechanism with a latch, it will take a lot of time, which attackers most often do not have.

• Breaking out the cylinder: a suitable key is selected that will fit into the well. Then they hit it with a hammer - all the details (pins, pins) are knocked down and the canvas opens. But this method is suitable if the lock is old or made of fragile material. You can protect yourself from such hacking by buying a durable mechanism or choosing a lock with a non-standard connector.
• Drilling is an effective hacking method. You can resist only by choosing a device with a mechanism made of high-strength materials.
• Knocking out: with the help of physical force, improvised materials, the mechanism is broken. The solution is to acquire strong structures.

The strength of the material is the main factor protecting the room from unwanted penetration. But you need to remember that the mortise lock should be easy to use and last a long time.

Types of keys for a cylinder lock

The mortise lock with a cylinder latch is the most common. Such a device is distinguished not only by the type of fastening (mortise, invoice), but also by the type of key. Some are easy to copy, but there are models that cannot be imprinted, have millions of combinations.

• English is an unreliable option, because it is a very common type. Due to the simplicity of the device, it is possible to pick up the key, which makes it easier for attackers. Easily breakable. Such a lock can be installed at the entrance to a room that does not have material values.

More about the features of the cylinder lock watch the video:

• The Finnish key is a high indicator of reliability. The mechanism uses slotted discs, which are code parts. Used in padlocks.
• Profile key - has a high level of secrecy, resists picks, easy to use. It has pins (active and passive), a large number of combinations.
• The key of increased secrecy - in the manufacture of some models, 3D technologies are used. Mechanisms are hard to hack and require tools and training.

For modern locks with handles, the last two types of keys are more often used due to the high degree of reliability.

The online store of door locks offers cylinders (larvae) for locks of imported and domestic manufacturers. Also in the assortment are half-cylinders, oval cylinders and turn signals for cylinders (turntables).

The secret part of the cylinder lock is the cylinder or cylinder of the door lock, a product of precision technology. The lock cylinder is fixed inside or outside the lock itself and can only be turned with the key inserted into the hole. The secret mechanism is usually located in a standard case, thanks to which the cylinders of different manufacturers can be interchanged, i.e. they are compatible with each other. Lock cylinders are very common in our time because of their ease of use (small key size, weak turning force during rotation, also the main plus - if necessary, not the entire lock changes, but only the lock cylinder - its secret part. Large reinforced cylinder mechanisms and larvae with protection against most known methods of criminal autopsy are popular.

One of the types of lock secrecy mechanisms is a cylinder mechanism. The structural element of the lock, of which the cylinder is a part, can only be activated when the native (regular) key is inserted into the lock bore. This category includes pin, disk, frame, magnetic and some special secrecy mechanisms. All manufacturers produce cylinder mechanisms of the same shape, thanks to which the "larvae" of different manufacturers are interchangeable with each other. This fact determines the huge popularity of mechanisms of this type in the segment of household locks.

The main advantage of cylinder mechanisms is the ease of replacing or repairing the lock. If it becomes necessary to change the lock, it is enough to replace only the central secret mechanism - the cylinder. The principle of operation of this mechanism is to line up the pins (needles) inside the cylinder in a certain combination, the pins take on the configuration of the inserted key. Someone else's key in the process of opening the door will enter the wrong combination of pins, and the lock will not open. The secrecy of the lock directly depends on the number of pins, their manufacturing accuracy, as well as protection against unauthorized manipulations.

The protection class of cylinder mechanisms varies from the first to the sixth. It depends on the number of pins, security mechanisms, case material, and additional anti-vandal features. When installing the mechanism in the lock, it is possible to equip it with additional protection - an armor plate.

Our online store represents only the main range of cylinder mechanisms. If you want to buy a cylinder whose model is not available on our website, you can always contact us and order the model you need.

In our online store you can buy cylinders for locks and other locking mechanisms at affordable prices and at any time convenient for you.