Replacing the lock cylinder of the front door. Entrance door lock cylinder: replacement and how to change the core, pull out without a key, replace and remove, remove

The lock front door is an important gateway The key is stuck or lost, the lock is stuck, or the child stuffed nails inside ... Do not immediately run for a new lock. You can take out and change the larva. Replacing the core of a cylinder lock is not difficult for a skilled man.

Cylindrical lock and its core

The cylindrical lock came to us more than 100 years ago from England. Such locks are the most popular among consumers, they are often chosen for installation for metal door. The cylindrical lock is almost impossible to crack by picking up a master key.

Often there are situations when the key to the door is lost or the lock breaks, but you should not rush to buy and install it on the door.

Cylinder locks are often chosen for a metal door

You can change its code part, in everyday life the lock cylinder.

The lock cylinder is a secret part. When the key is in the lock from the outside or from the inside, the larva is fixed. If necessary, you can easily replace it. It will also not be difficult to buy it, since many larvae are universal - for most manufacturers they are interchangeable.

How to pull the larva out of the castle with your own hands

AT Everyday life we often encounter locks. There is not a single person who does not carry at least one key with him. There are many reasons for replacing a lock. Whether it's the loss of a key or a stuck lock. It is not always necessary to change the entire lock on the door. Sometimes it is enough to replace only the code part of the cylinder lock - in other words, the larva. It will come out cheaper and will not require special efforts. Dismantling the lock will take no more than 10-20 minutes.

In order to remove the broken larva, you will need a screwdriver and a key.

First you need to understand that the larva is held by just one bolt. We determine its location. Spend conditional line from the keyhole to the end of the door, where the bolts are. Just below this line there will be a bolt, and you need to unscrew it.

To pull out a broken larva, you need to prepare a screwdriver and a key

If the larva did not get right away, then the key will help. You need to insert it into the lock and turn it a little.

The flag on the larva will fall into place, and it will be easily removed. After that, you can go to the store with it and pick up an identical one. The reverse procedure for installing the core is not difficult.

There are times when you need to replace the larva in the lock, while not having a key. Disassembling the lock and removing the core is a little more difficult, but quite possible.

First you need to remove the bolt from the end plate of the lock (in the middle of the bar) and try to get the larva. If it does not work, then we solve the problem with the lock.

Larval extraction options door lock:

1. To begin with, try nevertheless to turn the cylinder (look at the photo of the larva in the section). For free rotation of the cylinder, the pins interfere, they must be lowered. To do this, drill a hole under the cylinder with a 3 mm drill bit. They will fall and the cylinder will turn. It is possible to completely shoot the cylinder with a drill, not the easiest, but still effective way.
2. This method consists in extracting the core without turning the flag. To do this, you need to remove the lining from the door, and try by all means to get ahead of which way the flag is turned. Then drill out the lock body to get the larva. It will not affect the operation of the lock.
3. Well last way- get it piece by piece. The larva is the weakest in the middle, where the flag is located and the bolt is screwed in, which fixes it in the lock. You can break the core with a gas wrench by turning it clockwise and back.

It is not easy to disassemble the lock and the core, but it is possible

After the larva is broken, you need to carefully remove all parts from the door lock. The remaining pieces may interfere with the installation of a new core.

If you have repeatedly encountered jamming of the larva, you should disassemble the entire lock and see if some part needs to be lubricated or repaired.

The problem with opening and closing the door can overtake you suddenly. In order not to buy a new lock, it is much easier and cheaper to replace the core of the lock. Changing the larva is not difficult, but you need to act carefully.

What to look for:

1. The core of the castle is different sizes. Because doors are different thickness cores differ in length and diameter. The size of the larva must correspond to the size of the cell under it in the castle. A longer larva will bulge out, and a smaller one may fall through the door.
2. You should select the larva by color so that it matches the color of the rest of the iron door fittings - the handle, the door lock.
3. There are several types of larvae. The first - with key holes on both sides, the second - with one key hole on the outside of the door and a turntable for closing the door from the inside.
4. The larvae also differ in the shape of the keys; this fact also needs to be paid attention to.

Replacing the lock cylinder of the front door is a fairly simple process.

Consultants in the store will always help you make a choice if you do not know which larva is right for your door lock.

If you are not confident in your abilities, it is better to entrust the replacement of the lock core to professionals. When not correct installation masks, the lock on the door may jam.

You should not buy cheap Chinese cores, they are made of a brittle alloy that can crack with the slightest pressure.

Replacing the lock cylinder and checking the functionality

After buying a new core for the door, you need to install it immediately. It is advisable to lubricate the inside of the castle, where the larva will be inserted. The installation process is the reverse of extraction.

A feature of this work is the correct installation of the larva in the door and the fixing bolt getting into the desired hole.

When replacing the lock cylinder, you need to be extremely careful

You also need to be extremely careful so that the larva does not fall inside the door, it is unlikely to get it out.

To do this, you can move the larva a little so that the bolt takes its place. The key is in the "Closed" position.

After replacing the core, it is imperative to check the lock for operability. To do this, smoothly turn the key in the lock of the ajar door, it should turn freely and not slow down. The lock should not creak and click. Only then can you close the door and turn the key again. The locking mechanism must close smoothly.

How to disassemble the door lock cylinder (video)

When faced with a lock jamming, first try to change its core. This work is not expensive and will take very little time. With the correct installation of the larva, the lock should last for a long time, unless, of course, you saved money when buying.

The key is stuck or lost, the lock is stuck, or the child stuffed nails inside ... Do not immediately run for a new lock. You can take out and change the larva. Replacing the core of a cylinder lock is not difficult for a skilled man.

The cylindrical lock came to us more than 100 years ago from England. Such locks are the most popular among consumers, they are often chosen for installation on a metal door. The cylindrical lock is almost impossible to crack by picking up a master key.

Often there are situations when the key to the door is lost or the lock breaks, but you should not rush to buy and install it on the door.

You can change its code part, in everyday life the lock cylinder.

The lock cylinder is a secret part. When the key is in the lock from the outside or from the inside, the larva is fixed. If necessary, you can easily replace it. It will also not be difficult to buy it, since many larvae are universal - for most manufacturers they are interchangeable.

How to pull the larva out of the castle with your own hands

In everyday life, we often encounter locks. There is not a single person who does not carry at least one key with him. There are many reasons for replacing a lock. Whether it's the loss of a key or a stuck lock. It is not always necessary to change the entire lock on the door. Sometimes it is enough to replace only the code part of the cylinder lock - in other words, the larva. It will come out cheaper and will not require much effort. Dismantling the lock will take no more than 10-20 minutes.

In order to remove the broken larva, you will need a screwdriver and a key.

First you need to understand that the larva is held by just one bolt. We determine its location. Draw an imaginary line from the keyhole to the end of the door, where the bolts are. Just below this line there will be a bolt, and you need to unscrew it.

If the larva did not get right away, then the key will help. You need to insert it into the lock and turn it a little.

The flag on the larva will fall into place, and it will be easily removed. After that, you can go to the store with it and pick up an identical one. The reverse procedure for installing the core is not difficult.

There are times when you need to replace the larva in the lock, while not having a key. Disassembling the lock and removing the core is a little more difficult, but quite possible.

First you need to remove the bolt from the end plate of the lock (in the middle of the bar) and try to get the larva. If it does not work, then we solve the problem with the lock.

Options for extracting door lock larvae:

1. To begin with, try nevertheless to turn the cylinder (look at the photo of the larva in the section). For free rotation of the cylinder, the pins interfere, they must be lowered. To do this, drill a hole under the cylinder with a 3 mm drill bit. They will fall and the cylinder will turn. It is possible to completely shoot the cylinder with a drill, not the easiest, but still effective way.
2. This method consists in extracting the core without turning the flag. To do this, you need to remove the lining from the door, and try by all means to get ahead of which way the flag is turned. Then drill out the lock body to get the larva. It will not affect the operation of the lock.
3. Well, the last way is to get it in parts. The larva is the weakest in the middle, where the flag is located and the bolt is screwed in, which fixes it in the lock. You can break the core with a gas wrench by turning it clockwise and back.

After the larva is broken, you need to carefully remove all parts from the door lock.The remaining pieces may interfere with the installation of a new core.

If you have repeatedly encountered jamming of the larva, you should disassemble the entire lock and see if some part needs to be lubricated or repaired.

The problem with opening and closing the door can overtake you suddenly. In order not to buy a new lock, it is much easier and cheaper to replace the core of the lock. Changing the larva is not difficult, but you need to act carefully.

What to look for:

1. The core of the castle comes in different sizes. Since the doors come in different thicknesses, the cores differ in length and diameter. The size of the larva must correspond to the size of the cell under it in the castle. A longer larva will bulge out, and a smaller one may fall through the door.
2. You should select the larva by color so that it matches the color of the rest of the iron door fittings - the handle, the door lock.
3. There are several types of larvae. The first - with key holes on both sides, the second - with one key hole on the outside of the door and a turntable for closing the door from the inside.
4. The larvae also differ in the shape of the keys; this fact also needs to be paid attention to.

Consultants in the store will always help you make a choice if you do not know which larva is right for your door lock.

If you are not confident in your abilities, it is better to entrust the replacement of the lock core to professionals. If the mask is installed incorrectly, the lock on the door may jam.

You should not buy cheap Chinese cores, they are made of a brittle alloy that can crack with the slightest pressure.

Replacing the lock cylinder and checking the functionality

After buying a new core for the door, you need to install it immediately. It is advisable to lubricate the inside of the castle, where the larva will be inserted. The installation process is the reverse of extraction.

A feature of this work is the correct installation of the larva in the door and the fixing bolt getting into the desired hole.

You also need to be extremely careful so that the larva does not fall inside the door, it is unlikely to get it out.

To do this, you can move the larva a little so that the bolt takes its place. The key is in the "Closed" position.

After replacing the core, it is imperative to check the lock for operability. To do this, smoothly turn the key in the lock of the ajar door, it should turn freely and not slow down. The lock should not creak and click. Only then can you close the door and turn the key again. The locking mechanism must close smoothly.

How to disassemble the door lock cylinder (video)

When faced with a lock jamming, first try to change its core. This work is not expensive and will take very little time. With the correct installation of the larva, the lock should last for a long time, unless, of course, you saved money when buying.

The front door is used every day, so it and its components are subject to wear and tear. Breakdowns happen quite often, especially malfunctions. defense mechanisms- castles. Therefore, parts may need to be replaced. How to do it and how to choose necessary elements? This should be sorted out.

Situations in which you have to replace the lock

There are several cases in which the locking mechanism will need to be replaced. Problems with the system can arise at any time, even when nothing portends a bad situation. or the entire product is required in the following cases:

1. Acquisition new design. As a rule, doors are supplied without a security system. Therefore, the lock will have to be purchased separately, although certain manufacturers may provide such services.
2. Loss of old keys. This is perhaps the most common reason for repairing or purchasing new products. Of course, you can always make a duplicate, but there is a risk that the copy will not be the same as the original and will not fit the "secret". In this case, a situation may arise when all components are lost.

1. Mechanism change. Sometimes unscrupulous manufacturers complete the input structures with low-quality parts. In this case, incorrect operation can lead to system malfunctions, deformation of crossbars and other elements. Therefore, using such a product may be unsafe.
2. Dismantling an unreliable security system. It is not always possible to install a high-quality protection element the first time. Therefore, it will be necessary to correct this if possible.
3. Breaking into. This happens everywhere, although the situation itself is not entirely pleasant. Sometimes in this situation it will be necessary to install a new input structure.
4. Sale of housing. This is additional measure precautions. You can not trust the former owners, who may turn out to be unscrupulous people.

Therefore, if the owner of the house is faced with at least one of the reasons presented, it is worth starting to choose the appropriate design of the protection system.

Features of cylinder locks

This is the simplest type of security device. Such a castle is characterized by distribution throughout the vastness of the Russian Federation. They are installed almost everywhere, because the majority of breakdowns occur with such products.

The main advantage of this product is that for the correct operation of the device, it is possible to replace not the entire mechanism, but individual components. So, it will not be difficult to purchase a new cylinder or the larva of the structure itself. You can find these elements in the relevant departments of supermarkets, in a specialized store or even in the market. This is a significant plus for self-replacement of components.

Note! All components are produced to approximately the same standard, which makes them more affordable and versatile. Therefore, it is possible to apply a larva from one manufacturer to the lock of a metal door of another.

You can change the cylinder lock by following the instructions below:

• remove the armor plate on one side;
• open the product with a key;
• unscrew the plate from the end side of the door structure;
• we close the lock so that the crossbars can be easily released;
• unscrew the screw, which is located in the center of the castle;
• insert new larva.

After that, you will need to carry out all the above processes again, but in the reverse order.

Lever type lock for front door

Such mechanisms are among the most reliable. Therefore, understanding the design of this mechanism is not as simple as it might seem initially. But most manufacturers attach official instructions to such products. Foreign manufacturers allow users to recode the mechanism for a new secret. To do this, you just need to buy a new product and insert it in place of the old one. It is recommended to purchase products from the same manufacturer as the primary metal door mechanism.

The replacement process is as follows:

• the first thing to do is to open door structure and remove the locking bolt;
• then you need to get the key from the lock and remove the cover of the case; the same is carried out with an armored plate;
• you can remove the handles and bolt, which will provide greater convenience when performing work processes;
• it is necessary to unscrew the screws at the end of the structure and remove the body of the locking mechanism;
• after that, you should carefully disassemble the system and replace the larva itself.

At the end of the work, you should insert a new mechanism in place of the old one (or an old repaired element) and screw all the screws. This is done in the reverse order of this instruction.

Products with sliding crossbars

most complex design is different given type mechanism. Here it is no longer so easy to change it at the front door to housing. These products are often used in modern designs. But, despite the unpopularity, they are distinguished by a greater degree of reliability and protection than others. With their help, you can significantly complicate the task of ill-wishers who are trying to break into the house.

The peculiarity of the product is that door leaf not only the side crossbars will be put forward. Such a system has additional retractable elements at the top and lower parts, which allows you to block the entire structure. Such products are popularly called "crab".

All these nuances will not allow you to just disassemble the mechanism and replace it. To do this, you will need to remove the doors from the hinges and completely disassemble their design by removing the canvas. The very process of replacing the larva with metal structure similar at the start with the dismantling of the lever mechanism. But here you will need to additionally pull the upper and lower components. When dismantling, use a wrench. Using it, you can easily loosen the traction of the crossbars and disengage them.

Important! You don't have to put in a lot of effort. This can lead to breakage of the crossbars. In some cases, this will completely destroy the insides of the metal input element.

After the successful installation of new components, you can begin to return the thrust to its original place. Next, secure the lock. It is quite difficult to perform all these manipulations without outside help the first time, therefore it is always better to use the services of specialists.

Replacement process

The main stages of work can be carried out independently, without resorting to the help of masters. To do this, it is initially necessary to determine the type of construction that is built into the product. In addition, you should know the number of clamps and whether the product has a deadbolt. It does not hurt to know how the structure is locked from the inside. Now it is worth considering the main elements and the detailed process of their dismantling.

Secret replacement is carried out in several stages:

1. The recess for the casing of the mechanism is made using a drill that is suitable in size for the body of the structure.
2. To prevent the hole from being too deep, it is recommended to stick a piece of electrical tape on the drill. This will allow you to control the depth of its entry into the butt.
3. After working with a drill, you need to clean the hole for the socket. This is done with a chisel and impact hammer.
4. Next, insert the body of the mechanism.
5. After that, fixation is carried out with screws.
6. The next step is to install the spindle and handles.

Replacing the mechanism is also quite simple. Of course, picking up a new product will not be an easy task, but possible. The larva itself can even be repaired, so it’s not always worth running to the store for a new lock. Since cylindrical mechanisms are common, it is not difficult to find accessories for them. This part of the lock is secret, and finding the key in the structure causes it to be fixed. If the old mechanism malfunctions, you can easily find a new one due to the versatility of this element.

Results

Sometimes it is not necessary to carry out a complete replacement of the lock on the door. It is enough just to replace the secret. This is the easiest and relatively inexpensive way to repair your front door and secure your home.

Unfortunately, this method will not always be available due to the fact that not all mechanisms are suitable for specific products. So, if there is a mortise safety element on the input structure, but there is no analogue, you will have to work hard. You may need to enlarge the nest holes or even move them to another location. But sometimes the situation forces you to cut out new ones, and this is painstaking work.

At first glance, when a lock fails, it needs to be completely replaced. But it is not always the case. If you have a cylindrical type system, then in most cases you can limit yourself to replacing the larva.

The process of replacing the lock is not particularly difficult. Therefore, it can be done by hand. Just follow the instructions. With its help, you can easily replace the larva in the door lock.

Advice ! If you have lost the key, then instead of buying a new lock, it is better to replace the larva in the door lock with your own hands.

What is a larva

Before you replace the larva in the door lock with your own hands, you must imagine what kind of mechanism it is, where it is located and how it works. The lock cylinder is a locking element. It is easiest to imagine it as a part of the system hidden from view. It is she who is responsible for accepting the key.

The door lock cylinder is a combination of pins that the key must match. If, during the opening process, the teeth on the key differ from the combination installed inside the mechanism, the door will not open.

Attention ! Some systems use cylinders instead of pins.

What are castles

To replace the door lock cylinder with your own hands, you need to understand a little about the design features of the main modifications. It is worth recognizing that general scheme originated in the 19th century. Since then, the system has only improved. The evolution has resulted in the following systems:

• "key key"
• "turnkey"
• semicylinder,
• "gear".

Each system has its own advantages and disadvantages, but you can replace the larva of each of them in the door lock with your own hands. To do this, just follow the recommendations below.

We change the larva

Dismantling

Before replacing the larva in the door lock with your own hands, you need to dismantle the mechanism that is already installed. In order to do this, you will need a simple Phillips screwdriver.

Further, in order to replace the larva in the door lock with your own hands, you will need to open the door. Focus on the end piece. This is where the bar is. Locking cylinders or pins pass through it.

Usually the system is attached to the end with three screws. The lower and upper ones hold the bar, the one in the middle is responsible for the larva. It is you who should unscrew it in order to replace this element in the door lock with your own hands.

Some systems have additional locking elements. Therefore, in order to replace the larva in the door lock with your own hands, you will need to do some more steps. Find the flag - it should be located in the middle of the larva. It is he who blocks its extraction in most expensive systems.

Attention ! The security flag helps prevent intruders from drilling the larva.

To replace the door lock cylinder with your own hands, you need to press the flag inward. After that, you can remove the mechanism. It is necessary to insert the key into the well and turn it. When you have done this, pull towards you with moderate force.

There is another option for removing the locking mechanism in the presence of a blocking flag. You can just press on the larva with reverse side. When doing this, remember to hold the device with your hand so that it does not fall to the floor.

Such a precaution will not be superfluous at all when you need to replace the lock. Indeed, in some situations, the locking mechanism is working. Problems with opening may be due to the locking device itself.

Choosing a new door mechanism for the lock

After you have carried out the dismantling, you need to purchase a new larva for the door lock, which you will have to replace with your own hands. There are a number of factors that you need to pay attention to when you are going to install door mechanism do it yourself:

1. The new part must meet the parameters door device in length and diameter. The slightest discrepancy will make the purchase useless.
2. To replace the door mechanism with your own hands, evaluate exactly where the mounting hole is.
3. The distance from the end of the new part must correspond to the same parameter of the old keyhole. This will allow you to replace the lock as correctly as possible. Moreover, the parameter should be the same on both sides. A little overshoot is allowed. But in this case, the part will bulge slightly.
4. Door mechanisms can have a different number of keys. Consider how many members are in your family and choose the right number, while not forgetting a couple of spares.
5. Since there are many modifications to door mechanisms, there are just as many keys. They may have different shape. Be plain or laser sharpened. Before the purchase new system you must understand exactly what you need to feel safe.

The last point when choosing a new mechanism cannot be called the most important, but it cannot be ignored - this is the color of your new keyhole. It must match the color of the entire device. Otherwise, it will be too conspicuous.

In some cases, you may not be able to take the part with you in order to later replace it with a new do-it-yourself door mechanism. Fortunately, there is a way out of this situation. But for this you need a tape measure. Just remove the parameters from the old sample. In this case, attention should be paid to the following parameters:

• length,
• diameter,
• manufacturer,
• distance from the end to the fixing connector.

After the characteristics are recorded, it remains only to remember the color and go to the market in order to subsequently replace the door mechanism with your own hands.

When buying, do not give preference to the cheapest product. You must take into account that the lock with the newly installed part will protect your restful sleep and property. Ideally, you should give preference to products from one manufacturer. This will avoid problems with do-it-yourself installation.

Advice! Do not purchase parts made of brass. The fact is that their pads have extremely low strength.

How to fix

As mentioned above, in some cases, the door lock cylinder can not only be replaced, but also repaired with your own hands. In this case, you do not even have to think about how to replace the lock. To implement your plan, find a plate fixed with paws. Bend them back a little so that you can move the plate.

When the plate is moved, you will be able to see the core of the lock cylinder. In most cases, the problem lies in this part of the part. That's just a repair is possible only if the part is collapsible.

When carrying out repairs, you need to treat the pins inside with special reverence. If you assemble them incorrectly, the lock will completely fail. Simply put, a key that has served you for a long time will not work.

Sometimes the whole problem is that the part is rusted. In this case, it is best to use graphite to lubricate it. A variety of oils are not so good. Their use often ends in a broken part. This is due to the fact that the substance thickens over time.

Mounting

In order to replace the system element with your own hands in the door lock, you just need to repeat the reverse steps to dismantling. However, this process has its own difficulties. For example, you need to accurately hit the screw into the hole, and this is not so easy to do.

When returning to the place of the screw, show a little patience. Just install the larva in the intended grooves and screw, but at the same time slightly move the resulting structure. Thus, all the parts will fall into place on their own, and you can replace everything without any problems.

After the screw enters the hole, it must be tightened. But the installation process does not end there. In order to qualitatively replace the door lock cylinder with your own hands, you also need to make sure how well the repaired device works.

To check, just insert the key into door lock and unlock and lock the door several times with your own hands. If no squeaks were found during testing and the mechanism worked without serious effort, then everything was done correctly.

Results

As you can see, replacing the door lock cylinder with your own hands is quite simple. To do this, you must first dismantle the old part. In this case, we must not forget about the blocker, which may prevent dismantling. After that, you need to purchase a replacement or, if possible, repair it. At the end, the structure is assembled in its original form.

The lock cylinder is the code part of the cylinder lock, which provides secrecy and moves the bolts. It is precisely because the larva is inserted inside the body and has an elongated oblong shape that it is called the "larva" in commoner. A sort of steel embryo.

In fact, the larva of the door lock in a professional environment is called a cylinder mechanism of secrecy. Abbreviated "CMS".

Exactly correct name this important detail we will use the castle further in the text. But still, let's leave the "larva" in some places for better indexing;)

You can buy a larva or a cylinder mechanism of secrecy for a lock in a lock shop. And get a preliminary consultation - by phone numbers listed above.

Quite often, we hear the phrase from the buyer: “How can I replace the larva and what do I need to know in order to pick it up”? The request has not been surprising for a long time: it is very difficult for an unprepared person to understand the whole variety of cylinder secrecy mechanisms, their types, lengths and standards. In this article, we will consider important parameters CMS and find out some of the nuances.

There are many types of CMS. Let's start with the most common ones, which comply with the European DIN (Europrofile) standard and are used everywhere.

Here is what the buyer first of all associates with the “door lock cylinder”:

Europrofile standard mechanisms are produced by many countries: from China to Europe. The cost of a cylinder, depending on the model and manufacturer, can vary: from 150 rubles to 20,000 thousand rubles. The higher the quality and better known brand mechanism, the more protective elements and innovative ideas are embodied in the lock cylinder, the higher its cost. For each model of a particular cylinder, you can write a separate material, for example, as a review article of the Slovenian CMS TITAN K56.

Here we will not dwell on any specific product, we will consider only the main parameters when choosing a cylinder.

The length and offset of the lock cylinder

We are sure that you do not need to explain the calculation of the total length of the cylinder - this is the distance from one edge to the other. The required length of the cylinder is selected taking into account the thickness of the door leaf and based on which cylinder lock you have chosen.

As we can see, the two parts of the cylinder are separated by a rotary cam. The width of the rotary cam is always 10 mm.

The displacement of the cylinder is measured from the middle of the fixing screw hole in both directions: external and internal.

An equilateral cylinder is one in which both sides are equal in length. The versatile cylinder has different lengths the same parts.

For example, below is a versatile cylinder movement of the English type of Turkish production Kale Kilit with a total length of 71 mm. Often used on plastic doors.

Second example: versatile cylinder mechanism Chinese made total length 90 mm. It is this size of the lock cylinder that is now popular on Chinese doors.

A cylinder of correctly selected length should not protrude much beyond the plane of the door leaf. If it is a wooden door, here the cylinder must be flush with decorative overlay or with a bar from the handle (peeping up to 3 mm is permissible). If an armor plate is installed on the cylinder lock, the length of the outer part of the cylinder will depend on the particular armor plate, on the method of its installation and on the particular door.

There are no fundamental requirements for the length of the inner part of the cylinder. But if with inside the mechanism will also be flush with the door trim or decorative trim, it will look aesthetically pleasing and harmonious.

Lock cylinder with turntable

For ease of use, the door lock cylinder may have a rotary turntable. It allows you to close and open the cylinder lock from the inside without a key. At the same time, the turntable has no “dead spots” - in any position native key the lock will always open.

Equilateral Chinese cylinder movement 60 mm long, with a turntable inside:

Versatile Italian movement 72 mm long, with turning handle on the inside (enlarged inner part cylinder is designed for thickness inner panel doors):

Other safety cylinder standards

If the cylinders described above fit some standards and can be installed in any cylinder lock case, then the following secrecy mechanisms considered have different sizes and fit strictly individually for one specific lock (or for some models of one manufacturer). For example, the cross-cylinder mechanism of the Turkish company KALE KILIT.

Suitable only for locks of this type (can be installed in locks of other Turkish manufacturers (for example, FAYN), or with a slight alteration, for Chinese-made locks (for example, 3M)).

But the domestic mechanism of secrecy under the cross key:

Suitable only for Kirov-made locks. And as you probably already understood, the Kirov movement cannot be inserted into the KALE KILIT case and vice versa.

For some domestic overhead locks, it is possible to purchase a cylinder separately. For example, the “FORT” mechanism, which often breaks down, is suitable only for locks manufactured in the city of Petrozavodsk.

The locks are of terrible quality, the mechanism of secrecy and the nodes of the lock are made mostly of silumin (a very fragile alloy), hence frequent breakdowns and, of course, the availability of a new cylinder! In the next photo, from left to right, you can see the cylinder mechanisms for the overhead locks "Glazov" and "Iset".

Their problem is the same soft materials and low quality manufacturing. Often such specific cylinders (cylinder selection options best quality no) are ordered and manufactured in China.

If you need to replace the lock cylinder in Nizhny Novgorod, our service specialists are always at your service by phone +7-987-110-30-43.

We will first find out what suits you, orient you at prices and, after agreement, we will send a master to replace you.

In the range of our company huge selection CMS. We sell both cheap Turkish and Chinese-made larvae, as well as highly secret CMS from famous European manufacturers. If, after reading the material, the lock larva still raises questions, we are always happy to advise you in the comments under this material.