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Larvae for locks of metal doors and wooden ones. Larvae for door locks - the secret of the whole mechanism

Not a single door can protect an apartment if the owner does not take care of a reliable lock. There are thousands of them on the market, in different price categories and with different types of work. But the main element of any castle is the larva. It is not always necessary to change the lock, sometimes (in case of breakage, loss of the key) it is enough just to replace the larva. But how to choose it?

Main settings

The easiest choice is a larva that complies with the DIN standard. It is not difficult to recognize it, the larva has a teardrop-shaped through groove. The height of the groove is 34 mm, the protruding part is 10 mm wide. These larvae are standard and their choice in the store is simply huge. If the larva does not fit the specified standard, it is necessary to choose a larva produced by the same manufacturer as the lock.

However, there are exceptions to all rules, and in this case too. So well-known manufacturers of Mul-t-lock and SuperLock use larvae in their designs that correspond in size to the above standard. But the device does not have a standard drive, it uses gears instead of cams. How to be? Purchase a larva with gears from any manufacturer that produces such products.

It is important to know. The inner and outer length of the cylinder has its own meaning. The longer the outer part, the easier it is to open such a lock for intruders.

Key types

By appearance key, you can recognize not only the larva, but also establish the reliability of the mechanism. Budget classic cylinders should be chosen for rooms when the threat of opening the lock is minimal. Such mechanisms are opened with the help of an English key. It is a flat or figured canvas having a jagged cut. A distinctive feature is the location of the pins in the same plane. It is worth abandoning the larva, unlocked with a cross-shaped key, its reliability is recognized as minimal.

More reliable are locks that open with a semicircular disc key. The plate has grooves and recesses on both sides, which makes breaking difficult. However, not every manufacturer can provide larvae with a semicircular disk wrench of good quality, so they are not common.

Keys-punched cards are recognized as the most resistant to breaking. They combine several types of secrets at once, as well as additionally using magnetic or electronic chips. The secret elements are offset, so it is not easy to open the lock.

But, of course, do not forget about the overall reliability of the castle. If it is made of steel, it will be more difficult to damage it.

Opening resistance

Reliable protection is provided by the larva, which combines the secrecy, compactness of the well and the strength of the material. The simplest larvae have up to five pairs of pins; the manufacturer supplies more complex designs with 13 pairs.

As for the well, the narrower it is, the more difficult it will be for a thieves' tool to penetrate it. Especially if the hole has false moves, indentations and curvature. The strength of the material is important when it comes to mechanical breaking.

Today, attackers have developed such a type of door lock breaking as bumping. The key blank is inserted into the well, after which blows are made on it. The consequence of this is that the pins get into the grooves and the core rotates. However, locks with an electronic or magnetic code cannot be broken in this way. Bumping is terrible only for those devices that have a spring.

Summing up, we can say that the choice of the larva depends on where the door is installed. Suitable for apartments in high-rise buildings simple devices, and for cottages it is worth buying constipation with maximum protection.

If you are interested in replacing cisa locks in Moscow and the region, visit servislock.ru

How to choose device and core

The mechanism called the core, secret or larva is responsible for the secrecy of the lock. Its main purpose is to ensure the safety of the home from possible unauthorized opening and entry of uninvited guests into the premises. Keys are inserted into the larvae, which, when turned, open and close the locks.

The larvae can be very different.

The most common ones are:

  • Cylinder. They have a good degree of protection against unauthorized opening.

Such locking mechanisms are manufactured under the RIM standard, in limited quantities, or the DIN European standard, the larvae of which from different manufacturers are practically interchangeable. The cores are selected depending on the thickness of the web and the location of the fastener relative to the inner and outer planes.

The table shows the types and features of cylinders:

Cylinder system Peculiarity
From the inside, the door is opened by a rotary handle or a turntable. It can be easily felt in the dark in the event of an emergency or a fire when the room is smoky. In such a larva there is a movable cam that transmits movement to the crossbars. Its position must be adjusted when installed on site.

In this case, the door leaf opens with a key from both sides. The lock is very convenient, if necessary, to lock the door in order to prevent sick old people or children from opening it from the inside. In addition, a key inserted into the well from the inside can be used as additional protection. It will be impossible to open the door from the outside.

The door only opens from the outside. The half-cylinder is installed on doors in rooms where people are not usually present. These are: small utility rooms or special buildings, such as an armory.

From the key to the crossbar, the movement is transmitted more smoothly, with the help of a gear. The number of its teeth depends on the type of model and manufacturer.

Tip: It should be borne in mind that replacing such a larva with a gear is quite difficult, and only a specialist can help with this. To install a new cylinder, you need to dismantle the product with the same mechanism as a whole.
  • Disk. Their difference from other mechanisms lies in the presence of rotating disks instead of pins, which, when the locking device is opened, line up at a certain angle. The shape of the key is a semicircular section, with cuts placed on it, in accordance with the position of the disks.

Replacing the larva is more difficult, their nodes are not as universal as those of other types of mechanisms. In this case, it is more expedient to replace completely.

With disc larva

  • cruciform. This is not a very reliable option. Pins located inside, sometimes you can even turn it with a regular screwdriver. To get to the larva, you will need to completely disassemble the lock.

The designs use pins that are built inside the larva on four faces when the key is turned. With many secrecy options, the cross-shaped cylinders in the lock can be easily opened using a screwdriver.

Tip: You should not change the larvae on such mechanisms, you should replace the element completely. But in any case, it will need a complete disassembly.

  • Pin or English.

Such a door larva can be:

  1. English. This is not a very reliable design;
  2. perforated, it is opened only when the cylinder is knocked out or drilled out, which is quite difficult and time consuming.
  • Increased complexity. They are very difficult to crack, manufacturers make the designs reliable and durable. Their price is more than usual, but you should not change the mechanisms with your own hands.

By purchasing high quality products of well-known brands, you can not change the larvae for a long time. This most often occurs when the key is lost.

Abloy Protec ruggedized element

In the most complex locking mechanisms are used:

  1. titanium body;
  2. armor inserts;
  3. a large number of combinations;
  4. pins are made of refractory metal;
  5. there are floating elements on the key.

It is impossible to pick up a key to such a lock, but it is quite possible to replace the larva.

Secrecy of the larva

For entrance doors, locks can be:

  • Overhead.

Overhead

  • Mortise, more reliable, locked on both sides with a key.

  • Upper.

  • lower, having only a locking function and additional fixation on the latch.

With additional latch

The material for the manufacture of the mechanism and the number of combinations of the lock determine their properties:

  • Reliability and probability of resistance to mechanical stress.
  • Wear resistance.
  • Key mismatch probability.

Larvae can have three levels of secrecy:

  • Low, with the number of combinations from 100 to 10,000. They are made from low strength materials and with a simple key profile.
  • Medium, with the number of combinations ranging from 5,000 to 50,000. It has a complex opening mechanism, but is not very high quality.
  • The highest, the number of secrets exceeds 100,000. They differ in the quality of the materials used for manufacturing and high precision assemblies.

Each larva has only its own design features, defining the process and the possibility of its replacement.

Choosing a new secret

The safety of property and the service life of the structure depend on the quality of the secret assembly of the lock.

When installing a product from a well-known manufacturer, it will not be difficult to choose the right node.

For this you will need:

  • Check the compliance of the new mechanism with the dimensions and connecting dimensions.
  • Pay attention to the quality of the material from which the larva is made.

Tip: You should not purchase a product from silumin. This is a very fragile and short-lived material.

  • Brass, steel, aluminum or its alloy with zinc are best suited for locking.
  • Savings are not always justified. A cheap mechanism can quickly break down, which will spoil the mood and lead to additional expenses. It is known that the miser pays twice.

Reasons for replacing the larva

It is clear that nothing is eternal. The nodes of the mechanism and its rotating parts gradually wear out. This process can occur smoothly, and sometimes a normally working lock suddenly began to open the doors tightly. There are several objective reasons that lead to the replacement of locks.

It can be:

  • Assembly failure associated with wear of parts during operation.

  • Defects from an incorrect attempt to disassemble the mechanism.

  • Due to mechanical impact on the door leaf.
  • After opening the lock with improvised tools, when the key was forgotten at home (see).

  • When hacked by unauthorized persons.
  • When the key is lost.

Disassembly and replacement of the lock

Before pulling out the larva from door lock if it began to work poorly, you first need to try to lubricate the internal nodes, including the secret. In this case, WD-40 fluid or regular machine oil is used. If after that the lock works just as poorly, the larva will have to be removed and disassembled, as in the photo.

To remove and open the door larva, you will need: a Phillips screwdriver and a tape measure.

If a mortise lock is inserted in the door, the work instructions suggest:

  • Remove the middle screw of the mechanism.
  • Insert the key into the well.
  • Turn the key so that the larva is freely pulled out.
  • Save screw.

Overhead door locks are completely removable. For this:

  • The fasteners that hold the lock on the door leaf are unscrewed.
  • Two screws are unscrewed that secure the larva in its place.
  • The screws are set aside neatly.

In more detail, the entire process of removing and disassembling the larva shows the video in this article.

Installing a new larva

Before you change the larva in the door lock, you must purchase it correctly.

For this:

  • The total thickness is measured door leaf with upholstery or insulation, if any.
  • If there are no changes, you can focus on the dimensions of the dismantled cylinder, which is much easier.
  • The diameter of the removed larva is measured.

Tip: When buying a lock for an existing lock, you should take the removed cylinder with you. If this is not possible, you need to focus on accurate measurements.

  • The new mechanism is selected in accordance with the color of the doors, otherwise it will not look very aesthetically pleasing.

To install a cylinder:

  • Install the purchased larva in place of the previous one.
  • Fasten with a screw, clearly hitting the hole that is intended for its fastening.
  • A slight movement of the core in the plane of the lock will help to bait it on the fastener.
  • The key is locked in the closed position.
  • The lock is checked for operability with the door open and then closed.
  • The lock should open and close smoothly and silently.

Only a high-quality larva for a door lock will provide reliable protection against breaking and entering by unauthorized persons.

The lock front door- most common cause its breakdowns and the most favorite object of action for burglars, tk. locks with some types of larvae, which are considered reliable in the popular concept, are actually silently opened in 1-3 minutes. This article describes how to replace the lock cylinder with a cylinder mechanism yourself. If the lock sticks, then this will save a considerable amount. If the degree of secrecy of the castle is unsatisfactory, then again, its increase can be done by replacing the larva, because. their installation dimensions and interface schemes with the lock mechanism are standardized.

Note: for thieves-burglars, the critical time for opening the lock is 5-10 minutes. Longer transported - the probability of "getting caught" increases dramatically. In this case, it is more profitable for the villain to look for other ways of penetration or to completely abandon the “case”, unless he knows in advance that there are expensive and compact quickly liquid assets “at the hut”.

Is it possible to?

Do-it-yourself replacement of the front door lock cylinder is possible if it is with a cylinder mechanism of one kind or another (see below). You can determine this by the type of key: if it is similar to those in Fig. further, then an entry-level home master can replace the larva in the castle without the use of special tools. Irreversible opening of the lock from the outside is also possible in some cases, see below. This may be necessary if the lock is jammed or the key is broken while trying to unlock the door, and there is no one inside who can open the lock from there.

Types of cylinder mechanisms

In terms of the ratio of the achievable degree of secrecy, reliability and cost, only trigger locks successfully compete with cylinder locks, slightly inferior to cylinder locks in terms of vandal resistance. The key of a trigger lock is similar to a 2-blade key from a lever lock, but it does not actuate the moving plates (levers), but the moving elements - mechanical triggers. Finding their positions, in which the bolt of the lock is unlocked, is extremely difficult and the most modern methods. Trigger locks are very expensive and for a house/apartment not stuffed with gold, jewels and small antiques, The cylinder lock is optimal for the front door.

The larva of a cylinder lock is also called its core or cylinder mechanism. This is a characteristic assembly of a cylinder lock, which is absent in locking devices of other systems. The peculiarity of the cylinder lock, firstly, is that it is possible to change the lock cylinder of this type of front door from the inside without touching the door itself; the work process takes no more than half an hour. Secondly, in many cases it is also possible to open a stuck lock from the outside without damaging the door.

The keys in fig. above from locks with a trace. types of cylinder mechanisms:

  • Pos. 1 and 2 - classic English with a single-row needle (pin) mechanism.
  • Pos. 3 - with a 2-4 row larva (pin or disk) under a cross key.
  • Pos. 4 - with a disk mechanism.
  • Pos. 5 - "punch card" from a larva with counterpins (counter-angles).

The larva of the lock is unlocked by inserting into the well and, possibly, by the initial turn of the key. Its complete rotation by means of the driving element of the larva (see below) and (in some types of locks) transmission parts pushes the bolt of the lock, which pushes / retracts its tongue (tongues). Larvae for overhead and mortise door locks with cylinder mechanisms different types arranged differently; resp. the procedures for replacing them also differ.

Note: it would be more correct to call the keyhole in the cylinder lock a nest, because well by definition is something through.

Needle

The principle of operation of a cylinder lock with a simple 1-row (English) larva is shown at the top left in fig. The cutouts of the standard inserted key shift the spring-loaded split needles (pins) so that the lines of their connectors coincide with the dividing line of the cylinder (rotor) and the housing (cage). Now the cylinder can be turned with a key. The mustache of the cylinder will then turn the leash with a cam (slide with a finger). The cam (finger) will push the bolt and the lock will open / close.

Cylinder mechanisms of any degree of complexity are produced in the next. design version:

  • The key-handle (pos. and in the figure) is the most convenient and common type.
  • Key-key (pos. b) - used when the door must also be locked from the inside. For example, in the door of the common lobby of several apartments.
  • Semi-cylinder (half cylinder, half core, pos. c) - is usually placed on the entrance doors of non-residential and utility rooms.
  • Pos. g - under the cross key. It is considered a mechanism of increased secrecy, but we will talk about this later.

more reliable

The main disadvantage of a simple English cylinder is the low degree of secrecy; the number of its combinations rarely exceeds 1000, so if the house is out of the way, the thief will have time to open the lock with a simple selection of keys. Further, a master key and 2-3 lever probes enter the well of such a lock, with which the larva is silently and reversibly unlocked in 2-3 minutes. Finally, if the house is also on the outskirts, pins can be made in the same 2-3 minutes. drill, see below.

Highly reliable pin larvae are provided with an anti-burglary hard alloy rod (from drilling, indicated by a green arrow in pos. I of the figure) and additional rods (blue and purple arrows) that prevent the use of a thin thief's tool. But the degree of its secrecy remains low, so honest locksmiths, at the request of the owners, prefer to open such locks from the outside by selecting keys.

In larvae with counterpins moving under the action of gravity (pos. II), secrecy increases by orders of magnitude: if one row has only 100 combinations, then together it will be 100x100 = 10,000. » no need: to take the lock with a tool, the counterpins interfere. It is possible to quickly open such a lock from the outside only by drilling with a diamond drill. The keys to locks with counterpins (pos. IIa) were called punched card or computer keys for their outward resemblance to antediluvian storage media. The lack of larvae for a punched card key is the small stroke of the pins. Increased precision in the manufacture of the mechanism is required, which makes it more sensitive to contamination. Therefore, in country houses with such locks, larvae are used on the same principle, but with a comb key, see at the end, about choosing a new larva.

Disk

Lock larvae with a cylinder-disk mechanism (pos. A in the next fig.) are most often used in overhead apartment locks, but sometimes in inexpensive mortise locks.

The principle of its operation is illustrated by pos B:

  1. The angles α between the axes of symmetry of the borehole and the sampling holes of each of the discs that make up the code packet are different;
  2. The angles α of each disc correspond to the bevels on the key stem;
  3. The inserted key is turned slightly;
  4. The select wells converge into a groove (pos. B);
  5. With a further turn of the key, the finger falls into the groove so that its middle falls at the junction of the rotor and the holder;
  6. Further, when the key is turned, the finger pushes the clip, which actuates the bolt.

The real advantage of the disk lock cylinder is one: it is very difficult to break the key. The disc mechanism is not very sensitive to contamination, and with a non-standard key, the code package can be turned indefinitely. Therefore, it is advisable to equip the doors of rooms with disk locks that have been unattended for a long time and are unattractive to burglars: country houses, sheds, garages. An amateur craftsman can also come in handy with the relative ease of recoding a disk lock with their own hands. For example, if the key is lost under suspicious circumstances or the keys were transferred by the previous owners. Instead of spending money on a new lock, you can sort out the package and make new keys from blanks. How a disk lock is recoded at home, see the following. video.

Video: transcoding a disk lock yourself

The disadvantages of a disc lock in the case for storing valuables are more than serious. The first - the same small, as in plain English, the degree of secrecy. There are disc locks for sale with a cross key (see fig.), But they are just as unreliable as pin locks (see below), but they are more prone to contamination than punched card locks. Secondly, the disc lock well is wider than that of the English one, and it is even easier to stick special tools there. A “clean” opening of a disk lock for the purpose of an unspoken search (so that the owner does not guess and a secret visit) takes no more than 5 minutes, and a thief's - 2-3 minutes.

Thirdly, the locking and unlocking mechanisms of the disk lock are separated, because. it cannot be locked by turning the key back. The locking is actuated by a spring-loaded flag protruding under the tongue. When the door is closed, the flag is recessed and releases the latch (pawl) of the bolt pressed by a stronger spring. Therefore, the owners of an apartment with a disk lock at the entrance are very likely to find themselves in the position of engineer Shchukin before meeting with Ostap Bender.

Fastening and opening

Fastening of overhead larvae and parts of inexpensive mortise locks is often done lengthwise (longitudinal, axial, pos. 1 and 2 in the figure). The bolt leash rotates with a freely suspended lamella (black arrows). To remove the lock cylinder with axial fastening from the inside, you must first remove the lock body and unscrew the fixing screws, after which the cylinder is taken out. Outside, the larva with axial fastening is torn out without a key with a crowbar or a mount with a sharp end. If the opening is master's, and the door is not steel and it is reluctant to mangle it, then you will have to drill it out. The axial larva of the disk lock must be drilled on both sides of the well (red arrow in pos. 1), and the pin - in the places indicated in purple in pos. 2. They are located symmetrically on both sides of the rotor at the level of the upper edge of the well (2-sided red arrow).

More reliable against breaking lock cylinders with side fastening, pos. 3. When opening it from the outside, it is useless to drill a bolt or try to knock the larva inward in order to push the bolt with a screwdriver: the cam of the leash will interfere (green arrow in pos. 3). In this case, the only way out is to drill the pins (see below). From the inside, it is possible to pull the larva out of the lock with a side mount for replacement without much difficulty:

  • Remove the inner handle of the lock-latch (see below);
  • The outer handle of the lock is pulled out along with the square axis;
  • Remove the inner lining of the lock;
  • Find the head of the fixing screw under the tongues (green arrows at pos. 4 and 5);
  • Turn out the screw;
  • Take out the larva inside.

How to remove the handle

Difficulties in this process can only be caused by removing the lock handle (if the key has not broken in the lock, see below). Its mounting on the axis is possible as follows:

  1. On both sides of the neck of the handle, the ends of some kind of steel rod are visible, polished flush. The upper end, when viewed under a magnifying glass, is wider than the lower end - a through conical pin.
  2. A rounded head without a slot is visible - a blind pin or a shaped bolt.
  3. The head of a slotted screw is visible - a simple bolt.
  4. One protruding end of the pin is visible - an old-style blind pin.

A simple bolt simply turns out. The old blind pin is pulled out with small end cutters, sharp-nose pliers (something like small blacksmith pliers) or side cutters with one-sided sharpening (without bevels on smooth sides sponges). The conical pin is carefully knocked out from the side of the narrow end with a light hammer and a spacer from a thin, rigid steel bar; e.g., a nail with a sawn end. You can’t beat with a sharp one: the end of the pin can rivet, and then it will have to be drilled out!

A head without a slot must first be checked: the pin behind it or the bolt. To do this, a rubber or PVC tube is pulled tightly over the head (so as not to spoil the view) and they try to turn it back and forth with small pliers. Turns in both directions - pin; it is taken out like the old deaf one, but in this case, you can still pry off the head with nail tweezers. If there is a shaped bolt behind the head (in this case, it will most likely be from below), then it will turn on one side and it will be noticeable that it turns out. Well, they turn it out.

If the lock sticks

It is better to try to open a faulty lock from the outside with a key, after all. a rusted larva can most often be repaired. The best way unlock the jammed lock as it should - 2-3 drops of brake fluid into the well. After an exposure of 1-2 minutes, the most rusty, but not completely broken lock, most often opens. Further, if the larva suits the secrecy, it can be sorted out and repaired, see the video guide:

Video: disassembly and assembly of the lock cylinder

If the key is broken

It is unlikely that it will be possible to remove the larva from the lock without drilling if a broken key is stuck in the well. The simplest way remove its remainder - a small black (phosphated) self-tapping screw for metal. White galvanized and wood screws are not hard enough. The hardware is wrapped in the gap between the rest of the key and the well; according to the principle of recoil, the broken one will climb out. If there are other ways, for locks with a very narrow hole, see for example. track. video clip.

Video: how to remove a broken key from a lock

How to drill

Since an ordinary citizen does not keep a set of tools for opening locks (we will still consider it a locksmith, and not a thieves one), and you still have to change a jammed larva, the very affordable way- drill out the pins. To do this, you need a drill from 3-4 mm; where to drill is shown in fig. below. Drilled needles will not fall down themselves, burrs and remnants of springs will interfere. Therefore, after drilling, insert any key or (worse) a flat screwdriver suitable for the profile (location of the longitudinal grooves) and turn, shaking, until the larva is unlocked.

Further, since the owner is not a thief or a secret agent, the time factor does not threaten him with a prison. Therefore, anti-burglary pins can be drilled with a drill bit. It will take a long time to transport: there are castles, the victorious one manages to get through them in an hour or more. You need to drill with a win with the lightest pressure so that the drill does not crumble. Larvae with counterpins under the key-punch card or comb will have to be drilled twice, at the top and bottom.

Replacement

Well, finally got out, damn! Now, what kind of larva to the castle should be bought to fit and be more reliable than before? With dimensions on the end, it’s simple: we take with us to the store a door lining with a window for the larva. If the lock with a larva is on an axial mount, it will also be necessary to measure the dimensions of the lamella so that it reaches the crossbar leash and enters it.

For locks with side fastening greater value has an asymmetry of the mounting hole, pos. 1 in fig. Standard installation dimensions of the lock cylinder for steel door given in pos. 2, but there may be others. And the last - the type of drive of the crossbar: cam or gear, pos. 3. Cam configuration and gear module are also different. So it is better to take the old larva with you.

Which is better?

We will reveal to the reader a secret well known in certain (and by no means only criminal) circles: “top-secret” cross-key locks are opened instantly with a strong sharp turn of a strong Phillips screwdriver. The code elements (pins, disks) and the gaps of the clip metal between them are very thin in them. Simple English and disk larvae of locks, as it is said, are opened with a special tool in 2-5 minutes, which is less than the critical thieves' time.

The conclusion is simple: it would be best to buy a new lock cylinder for a punched card key for a city apartment, and for country house- also a counter-pin for a comb key, see Fig .. If other possible ways of unauthorized entry into the house are stopped (good outdoor lighting, local security alarm, bars on the windows, a guard dog in a kennel or aviary; perhaps the system and registration) then you can sleep peacefully behind doors with such locks. How realistic is this in today's world?

Helpful information

Mortise lock with latch for cylinder mechanism

A mortise lock with a latch for a cylinder mechanism is one of the most common types of locking devices. It is quite reliable and easy to use. Similar design provides for the possibility of replacing the larva, which will save on the purchase of a new one locking mechanism.

As a rule, the reliability and quality of the inner larva as a whole determines the reliability of the lock itself. Therefore, you need to buy an internal mechanism only from trusted manufacturers, while taking into account the technical parameters of the cylinder. In the presented segment, the trademarks Elementis, Roto have proven themselves well - the TBM-Market catalog includes options of different sizes, with different types larvae.

Entrance door lock larva buy in Moscow

A cylinder mechanism with a turntable is considered quite popular. It can be mounted on the input or interior door. But more often the cylinder mechanism for the lock is selected for entrance doors, because. at a relatively low cost, it provides reliable protection against hacking. A turntable is a special rotary handle that opens the lock from the inside without a key. At the same time, with outside The cylinder mortise door lock with a latch can only be opened with a key, like any other standard lock.

To buy a larva for a door lock, you must first measure the total length of the cylinder mechanism. This can be done independently using a regular ruler. If you are planning to replace internal device in already installed lock, it is better to get the core and pick up a new one in the store that matches its size, design. If you have any difficulties in this matter, we are ready to advise you and help you with the choice.

We try to form the most complete assortment, so we are guaranteed to select the core for your castle. If necessary, we can offer quality door handles presented in the adjacent category.

Do you urgently need the best and most reliable lock cylinder? Do you have a lot of requirements for the front door and this functional element? Can't decide on the best cylinder model?
Then the advice from the article and the recommendations of the competent masters of "Zamki-SAO" will be very useful to you. Prices for door larvae are very different, however, not all products are good. Consider the main factors to consider when buying a part.

How to choose the best larva for the castle?

You can buy a larva in almost any specialized store. However, there are a number of aspects that need to be considered first. An ideal and reliable lock cylinder must necessarily meet increased requirements, including the following points:

  1. The maximum level of secrecy.
  2. Trouble-free operation, including with intensive use of the front door.
  3. The best, highest degree of burglar resistance.
  4. Ease of use of the lock.
  5. Durability.
  6. Resistance to intellectual and forceful influence.
  7. Wear resistance and reliability.

Of course, there are other points that deserve consideration. In most cases, input manufacturers metal doors not the best larvae are installed in locks. As a rule, these are elements of medium and low secrecy. If the larva or cylinder is the weak link of the lock, then even a complex crossbar system will be opened in a few minutes by thieves and other intruders.

The reliability and quality of the larva is also determined by whether it is able to withstand power hacking options, including drilling, knocking out, breaking. Of course, it is best to buy a cylinder from a foreign manufacturer, as it will be of better quality.

What is the most reliable larva for the front door lock - the best models

Nowadays there are a lot of reliable and good lock grubs that are able to withstand bumping. As a rule, these are cylinders of higher price category. The masters of our service department will kindly advise you and help you choose the most reliable cylinder for the lock on the front door. The products of the following three manufacturers have gained the greatest popularity, namely:

Whichever cylinder secrecy mechanism you choose, you should give preference to certified products from trusted manufacturers. Simplifying the design while maintaining the burglar resistance of the larva is the course taken by the owners of many lock and hardware companies.

If you need the best larva for the lock, then our leading masters will be happy to select the most reliable model, taking into account the input locking mechanism and your wishes. Moreover, they change the lock cylinder in a delicate way, provide long-term guarantees for the cylinder and services. We have been working with burglary-resistant and imported models for years, so we always offer our customers the most best options for price and quality. We are waiting for your calls!