Do-it-yourself door handles

In detail: do-it-yourself door handles repair from a real master for the site my.housecope.com.

During the operation of the door, the handle and the locking mechanism associated with it take the greatest load, so it is not surprising that these elements often break. In most cases, the door handle can be repaired by yourself using a screwdriver and a wrench. Sometimes it is necessary to replace some parts of the mechanism or the entire set as a whole.

Removing the door handle fasteners

There are three main types of door handles:

Round swivel. They are an integral part of a mortise lock, which is activated by turning the handle clockwise or counterclockwise.
Press. The difference from the first point is in the presence of a convenient lever handle, which opens the lock when pressed and closes when returning to its original position. This option is the most convenient for both interior and entrance doors.
Stationary (usually in the form of a ball or staple). These handles are not associated with the lock, they perform a decorative function and serve as a handle when opening the door leaf. Doorknob repair of this type is either tightening loose bolts or replacing it with a new product.

Round rotary handle secured by a lock

When the question arises of how to fix a doorknob, the first step is to familiarize yourself with its device. For those who have come across the installation of a lock on a wooden door, this will not be difficult. Lever and rotary handles consist of the following elements:

Lever.
Locking mechanism with bolt. Its principle of operation is simple - when the handle is turned, the tongue (deadbolt) goes into the mating hole on the door frame and blocks the door.
Square (square pin). Connects the handle and the lock.
A decorative strip that masks the fasteners.
Recoil spring. Responsible for returning the handle to its original position.
Handle travel stop.
Retaining ring.
Plastic ring.

Video (click to play).

Elements that make up the door handle

If the door handle is found to be broken, you must first determine the cause. The experience of using door handles allows us to distinguish 5 types of breakdowns that are most common:

The handle is sticking, resistance is observed when turning.
The handle falls off, while its fastening remains in place.
The four-sided pin (square) inside the lock breaks.
When the handle is turned, the tongue does not move.
The handle does not return to its original position after turning.

Now let's look at how to repair a doorknob in each of these cases.

Metal parts of the mechanism under constant use are subject to abrasion, especially if dust particles get there. To avoid this, you need to monitor the presence of grease in the lock. Put a little oil on the bolt and twist the handle so that it is evenly distributed over all parts.

Sometimes the reason lies in loose structural elements. It is necessary to correct their position and tighten the fastening bolts.

How to properly lubricate the door mechanism

The culprit of the breakdown in this case is the retaining ring, which is either deformed, or displaced, and may even burst completely. Repair will take time, but it will not be difficult to do it:

Remove the decorative rosette by turning it several times (sometimes it is fastened with a small screw from the bottom, then it must first be unscrewed).
Use a screwdriver to unscrew the screws or bolts to which the mechanism is attached.
Remove the structure and check the condition of the retaining ring. If it is bent or broken (as is the case in most cases), you need to purchase a new part.
Insert the circlip and the entire mechanism into place.
Install the handle and secure it.

Removing the decorative strip and unscrewing the fastening elements of the handle

This is possible only when using cheap low-quality products that are made of a fragile material - silumin. In this situation, you will have to change the mechanism completely. To avoid such breakdowns, it is better to purchase steel structures from trusted manufacturers. Replacing the handle is as follows:

The fasteners at the base of the handle are unscrewed, then it is removed by itself.

Unscrewing the screw at the base of the handle

If the latch does not work when the door is opened, the cause of the malfunction is a too short square. It gradually moves towards the latch and presses it down. As a result, it cannot function normally. In this case, you need to act like this:

Purchase a longer square on the market. If the length is longer than necessary, you can shorten it with a grinder.
Unscrew one of the handles and take out the structure.
Replace the square and put the handle back in place.

If the handle does not spring back to the horizontal position, this does not mean that it has broken - it may just that the return spring has come off. You can put it in place in the same way as the retaining ring. But sometimes the spring bursts, and this already becomes a problem: it is very difficult to acquire this part on the market. Often in such cases, the entire mechanism is changed.

Spring responsible for returning the door handle to its original position

Sometimes it is required to repair the outer door handle made of metal, or rather to replace it, since Chinese fittings made of silumin often break down. This is easier to do than installing a lock on a metal door. The algorithm of actions is not very different from replacing the handle of an interior door:

The fasteners are removed.
The square is extracted. If it is of a suitable length, you can leave it.
Attach the pads and spacers and place the handle on the square.
They put the bar in place, the deadbolt must snap into place.
Screw on the fasteners.

In most cases, repairing a doorknob is not difficult, the main thing is to correctly determine the cause. If the structure cannot be repaired, you should think about purchasing high-quality fittings from well-known manufacturers. To get a better idea of how to disassemble a doorknob, watch the following video.

If the doorknob stops working, don't rush to the store to have it replaced. In most cases, this lock assembly can be repaired. Let's find out how to fix the front door handle, and you will be convinced that there is nothing complicated about it - you just need to have a screwdriver and a few minutes of free time.

Before we repair the doorknob, let's get acquainted with its mechanism and how it works. Let's say right away that we are talking about a lever handle, since it is it that is usually used on entrance doors.

So, the mechanism has the following details:

Handle - this is exactly the element that we grasp with our hands and press to open the door;

Socket - is a round platform in which the movable mechanism and the handle stopper are located. Also, the socket provides fastening of the entire unit to the door;

Decorative overlay - is a ring or square that is screwed onto a socket;

Travel stop - the name of this part speaks for itself;
Retaining ring - fixes the handle in the socket;

Square - this is a square axis that transmits the rotary movement to the lock and the counter handle.

Note! In some models of handles, instead of a round rosette, there is a long plate-overlay, which also serves as a frame for a mask or a place for attaching the lock handle. But, regardless of the platform, the principle of its mechanism is always the same.

Thus, when we press the lever, the axis rotates, which sets the lock mechanism in motion.As a result, the latch is pulled out of the strike plate, and the door is unlocked.

Typically, people are faced with the following pen malfunctions:

Jamming is a breakdown that is usually not associated with a handle. The reason usually lies in the lock or in the incorrectly configured door. To pinpoint the cause, open the door and press the handle.

If the door does not jam when the door is open, then the latch is stuck in the strike plate.

To fix the problem, you need to do the following:

Tighten the self-tapping screws that secure the striker to the door frame;
Tighten the self-tapping screws that attach the lock itself to the door leaf.

Lubricate the section of the striker plate that comes into contact with the latch with machine oil;
Lubricate the lock latch.

If the reason for the jam is that the door is loose, inspect the perimeter of the door. Pay particular attention to the sealant. Replace it with a new one if necessary;
If the door has adjustable hinges, adjust its position.

Nuance: it is advisable to lubricate the latch only as a last resort, since sooner or later it will surely stain your clothes.

If it turns out that the handle is sticking even when the door is open, i.e. the problem is not in the coincidence of the latch with the striker, most likely the lock mechanism itself is faulty.

In this case, the troubleshooting instructions are as follows:

Lubricate the latch without disassembling the lock with machine oil or WD-40;
Check the functionality of the mechanism. If this action did not bring any results, follow the further recommendations.

Unscrew the decorative trim ring;
Unscrew the screws that hold the socket;
Loosen the locking screw located on the back of the handle that secures the rod;

Remove the plastic cover located inside the socket, if any;
Lubricate the swivel mechanism, pay particular attention to the spring and the space between the handle and the socket;
Check the functionality of the mechanism.

In the same way, you need to lubricate the counter handle, since the cause of the malfunction may lie in it.

Dismantle the lock;
Unscrew the lock cover (side);
Lubricate the latch mechanism.

After completing all these steps, the problem will definitely be fixed.

If the handle stops springing, then there can be only one reason - the return element does not work.

In this case, you need to dismantle the handle according to the described scheme, and then perform the following steps:

Insert a slotted screwdriver into the space between the socket and the stopper;
Pry the stopper with a screwdriver and remove it as shown in the photo.

Insert the spring into the grooves of the handle core;
Secure the spring with a travel stop on top.

A similar repair to the door handle mechanism can be performed if the spring simply flew off the core.

If it has burst, then it is quite difficult to find it on sale, but you can take a different path:

Remove the spring from the broken handle, if any;
Make a spring yourself, for example, from a key ring from a key ring.

Otherwise, you will have to change the handle completely.

A similar situation is possible only if the retaining ring has fallen off the handle core. To solve the problem, you need to dismantle the socket, then insert the handle into it and install the locking ring, as well as other parts, i.e. spring and travel stop.

If the ring bursts, it is not necessary to replace the entire handle. You can choose a suitable counter washer and install it in place of the ring. If necessary, the washer can be tightened with your own hands using pliers so that it tightly squeezes the core.

Note! There are situations when the handle falls out because it simply breaks off the core. This situation can only happen for two reasons - the handle is of poor quality, i.e.made of silumin, or a short rod is used in the door, which did not fully enter the core. If the reason is in a short core, then before installing a new handle, it must be changed to a longer one.

If you press the handle, but the latch does not work, there can be two reasons for the malfunction:

The short rod flew out of the core, as it moved towards the counter handle;
The square milling of the core has “cut off”.

In the first case, you will have to change the square axis to a longer one. Of course, you can temporarily solve the problem by centering the position of the square and fixing it in the handles with locking screws.

Do not forget, however, that this could damage the handle. As we said, the axis must go deep into the core.

As for the second case, the repair of the front door handle made of silumin does not make any sense at all. No matter how you repair it, it will soon break completely and irrevocably.

The only way to temporarily fix the problem is to try to seal the joint, for example, by winding electrical tape around the rod. Another option is to make a cut along the bar and slightly expand it, if initially there is none. You can even insert a small wedge.

But, the result will still not be long. Also, keep in mind that if the rod fits too tightly into the silumin core, the handle may just split.

Now you know how to repair a doorknob. To see this again, watch the video in this article. If it turns out that in your case repair is impossible, you can easily install a new mechanism.

Photos from the site replacement-installation-repair-locks.rf

Surely each of you has come across a door handle breakage in an apartment. The problem is quite common, and the reason for this may be both the poor-quality assembly of the manufacturer, and the design of the mechanism itself, which tends to fail over time. If you bought the accessories recently and you still have warranty receipts, the store will replace your faulty device with a new one. And in case of a breakdown of the handle, which has served you faithfully for several years, do not rush to run to the store for a new one. In this article, we will tell you in detail and describe how to repair the handle of an interior door.

The door handle is a device, although it is quite simple in its design, but with constant use, even such devices can fail. Sometimes, in order to make the handle work, you need to make just a couple of manipulations. In other cases, you will need to purchase and install a worn part.

You may not even notice the "symptoms" of a breakdown, or you may not attach any importance to them. However, just by paying attention to such seemingly little things, you can save on buying new expensive accessories or on the services of a master.

To avoid this, let's consider the cases that can lead to further damage to the device:

Door handle stuck. When you try to open the door, the device "resists", you have to resort to the use of force and twitching to achieve the desired result.
Door lock stuck. In this case, the problem lies directly in the very design of the door mechanism. The valve can be both opened and closed with difficulty.
Backlash of door fittings. The device does not fit snugly against the base and wobbles. The mechanism itself can be loose.
The door handle does not turn to the start position. When manipulating the door, the device does not return to its original position, although it should immediately spring back.This problem happens both with the handle separately and in conjunction with the latch mechanism.
The tongue is jammed. When the door is opened, the latch tongue either does not come in, or comes in, but then does not come back.

In order to fix a breakdown, it is necessary to correctly determine its cause.

How to fix an interior door handle? You can take the path of less resistance and call a foreman who will repair your broken device for a small fee. If you like to dig into mechanisms on your own, believe in yourself and are not afraid of difficulties - you can repair the handles of interior doors with your own hands.

To simplify your acquaintance with the mechanism of the device, let's consider what types of handles are on the market:

Swivel. These are one of the most popular devices for door installation inside an apartment. This type of handle is usually round and has a keyhole in the middle. To open the door, it is enough to turn such a device clockwise. If your doorknob opens counterclockwise, it may be incorrectly installed.

Photo from the site remontistroyka.org

Press. Unlike rotary ones, devices of this type are equipped with a lever. To activate the device, simply push the handle down.

Fixed. Models of this type have been used extremely rarely lately. They do not have a locking mechanism and are easy to install. They are either attached to a rod and screwed on both sides, or fixed with screws.

Photo from the site>

The next step in understanding how to fix an interior doorknob is the design of the appliance.

Let's take a look at the mechanisms that make up the door handle:

Lock. The mechanism inside the unit. The main element of the lock is a latch. It is she who keeps the door closed.
Quadrangular retainer. This mechanism is brought out and connected to the inside, thereby activating it.
Lever. The outside of the device. It is the handle that you pull or turn to open / close the door.
Overlay. It is used as a decorative element and also covers all mechanisms and fastenings.
A reciprocal element. This part is located inside the door handle box. In essence, it is a plate that covers the gap in the frame, where the valve falls.

In order to repair the handle of an interior door yourself, try to disassemble your device, familiarize yourself with the mechanism of the mechanism and determine the cause of the failure.

Suppose you are faced with a breakdown of an interior door handle, what should you do? There are many options for repairing the mechanism, each of them is based on what caused the breakdown. But first, let's take a look at the tool we need to remove the doorknob:

Knife. In case you need to pry on the decorative overlays.
Phillips screwdriver. For loosening the bolts holding the handle. Please note that a small screwdriver should be used, otherwise there will be a risk of stripping the threads.
Lubrication. The liquid is needed to process mechanisms.

Perhaps the easiest problem to fix is the sticking of an unlubricated mechanism. In order to fix such a problem, you only need a screwdriver and grease.

Unscrew the hardware item, then lubricate it with a lubricant. It will be enough to drip onto the latch once and turn it a couple of times or press the handle so that the grease is evenly dispersed through the mechanism of the device. In the absence of lubricating fluid, the mechanisms are erased and work incorrectly; dust can aggravate this situation. If there is a lot of dust in your house, then do not expect a breakdown, periodically disassemble the mechanism for cleaning and lubrication. This repair option will also be useful to eliminate the squeak in the mechanism.It will not be superfluous to lubricate the devices that have been purchased for a long time, this will extend their service life, and also become a guarantee that the device will not let you down in the near future.

The next easy way to fix a broken interior door handle is to tighten the hardware bolts. If your door has a gap or the handle itself is not where it should be, just tighten the screws with a Phillips screwdriver.

Photo from the site>

If none of the previous options suits you, you should determine the cause of the breakdown. To do this, you will have to disassemble the handle of the interior door. The first step is to remove the trim. It is usually located below the handle and hides the screws behind it. Twist the caps a couple of times, after which they will easily come off. Next, unscrew the screws behind the cover plate, and then remove the door handle. So now you see the mechanism inside the device. You do not have to pull it out; to determine the breakdown, it will be enough to look at the device.

The first things you should look at are the spring and key disc. To get a closer look at the disc, you must remove the retaining rings from it. This part is prone to breakage, so we advise you to take a look at it first. In the event of a malfunction or defect, you should contact the nearest plumbing or furniture store and buy from them a spare part similar to the broken one.

If the disc looks intact, move on to the spring. First, it should be said that the spring facilitates the operation of the handle. It is this detail that makes it turn or lower. Also, the spring is responsible for the operation of the sliding tab. If the problem initially consisted in the incorrect operation of these mechanisms, then you should immediately check the spring. If the spring is stretched or deformed, you will have to buy a similar one in the store. But sometimes it happens that the spring just pops out of the saddle. If you have just such a case - you are in luck, you just need to fix the spiral and put it in the saddle, where it should be.

If the above methods do not help, let's move on to "heavy artillery". Remove the plate from the back and take out all devices for a detailed examination. If you find a deformed or broken part, remove it and contact the store to buy an analogue.

The entire mechanism must be assembled in the same order in which you disassembled it. Place the parts one at a time to simplify the process. With this approach, you will not get confused.

If the malfunction turned out to be serious or you cannot determine the cause of the breakdown, it is better to call a specialist or purchase new fittings. This will save your nerves, although it will affect the state of the wallet.

We invite you to familiarize yourself with the video on how to repair the doorknob of an interior door.

So, in the article we talked in detail about the repair of interior door handles with our own hands, and the video presented above will simplify the process. After reading the text, you will not have any problems with fixing the home furnishing element.The handles that are used in interior doors are actually quite wide variety and there are several options for adjusting them, so of course it is better to know which handle you have.If there is an ordinary handle, as in the middle in the photo, then a square can be inserted through the door, on one side the handle is pressed in on this square, and on the other side there is a cut under the cone on the square. When a second handle is inserted into this cut, it is tightened with a small bolt under the handle, it is either under a flat screwdriver or under a hexagon. But you just can't tighten it up, you need to remove it and if the plane is erased on the square, then trim it with a file.Everything is the same as in the first version, only there is no bevel on the square, so there should be two bolts there.Unscrew the bolts and remove the handle, it is also necessary to process the surface and screw it again.The handle can be held on the latch, you won't do much here if the grooves for the latch are loose, it is easier to replace the handle, although some wind a strong thread between the door and the latch, but it frays very quickly.If the handles are in a semicircle, then most likely there are one or two hexagon bolts on them from below, they also need to be removed and, having processed the surface where they rest, clamp them in a new way.Perhaps there are other options for attaching the handles, I have not come across them, if you have something to tell, write in the comments.If the handle gets loose in the lock, then it is practically not treated, since the adapter and the case are erased, there is only a replacement.Door handles for interior doors are different not only in the material of manufacture, type of fastening, appearance, but also in the type of handle design itself.These may be stationary handles that are not connected to the lock at all, these are interior doors for this reason, or the locking mechanism is absent as such, or it is not complicated.The handle can be stationary, rotary, push and in each case its own "treatment".If you have regular stationary handles, they are available in several versions.Or the door leaf is drilled inside the nut handles, and the fastening is carried out with a hairpin with a thread cut along the entire length.Sometimes the handles twist from this thread, it is enough to open the doors, hold one handle and screw the other clockwise.If the handle is attached to the door leaf through screws,We unscrew the screws, or change them to a screw of a larger diameter, or drive a wedge + PVA glue into the regular holes, wait until the glue dries and tighten the screws into place, that's it, the handle will no longer wobble.By the way, the backlash on the rotary handles is also eliminated if there is a problem with attaching the linings to the door.Basically, all interior doors are equipped with handles that are connected through the door with a single pin, and the handles themselves act as nuts.That is, the meaning of them is such a hairpin is screwed into one handle, it is pushed through the hole in the door and the opposite handle is screwed to the other end, perhaps they can then be fixed with thin screws so that they do not unscrew, or they can simply be tightened and that's it.Therefore, it is very simple to do this, if there are fastening screws, then you need to unscrew them on one side, you do not need to do this on the other handle, then just in opposite directions (clockwise) tighten and secure with self-tapping screws.If there are no fastening screws, and the handle is constantly loosened, then you can apply any adhesive or sealant to the thread of the stud, tighten the handles and they will hold tight.It is very easy to tighten the doorknob of an interior door if it looses, and even a blonde can handle this. But only if you tell her and show her how to do it. So I was faced with this. Neither my husband nor I have come across such a thing as disassembling such a mechanical handle of an interior door. So they walked around, licking their lips around the handle, twisting it, and it just began to dangle more and more. Until they showed how to fix it. Then in about ten minutes all the door handles in the apartment were repaired.First you need to disassemble the doorknob, but not completely. It is necessary to remove the case. If it is a round handle, then somewhere on the side of the "ball" there is a small circle, if it is a "pedal" handle (I will call it so that it is clearer for blondes))), then this circle is on the "leg" of the door handle. It's a little button. You need to press on it (you can use a screwdriver) and pull the handle towards you. This removes the handle body from the base mechanism. Now you need to remove the circle that adjoins the door. If it cannot be removed just like that, then look, it has a small groove, you can pry it off with a screwdriver. You don't need to shoot anything else from this side.If you did not see the bolts under the circle that was just removed, then we remove from the other side of the door everything is the same here. On one side of the door, under the circle adjacent to the door, there must be two bolts. They need to be tightened and the handle will fit snugly against the door. Now we just put on the previously removed decorative details of the handle and that's it.Here's a video to help you:

Simple door handles are often screwed to the door leaf. When the handles start to wobble, these screws need to be retightened. It will not work - take screws longer or thicker.

There are models, the halves of which are pulled together with long screws through the door leaf. The screws are simply tightened here.

There is a knob, the halves of which are connected by a threaded pin. Here it is enough to hold one handle firmly with your hand, and tighten the other tightly with the other hand.

There are door handles - latches. Here you first need to remove the handle by pressing or unscrewing the fixing piece. Remove the round decorative strip (it can be fixed with self-tapping screws). Alternatively, pry off the round plate with a flat screwdriver; on the side you need to find a groove for this. A rectangular plate with a hole will become visible. If the screws are loose in it, they are tightened, the parts are reassembled.

If the handle lock is loosened and it is constantly independently removed from the central rod, then it is necessary to tighten the lock (it can be an ordinary feint or a hexagon screw).

There are complex designs of handles that are part of a door lock with many details, their repair will be better done by a specialist.

Door handles are different now. But with each of them such a problem can happen - they unwind and begin to dangle. This means that the screws that hold the lock have been unscrewed - they are inside this structure and are screwed directly into the door itself.

A common thing about doorknobs is that they are completely covered by round discs, which create a nice look but prevent the doorknob from getting inside the structure. First you need to remove this decorative disc. To do this, press with a screwdriver or a knife on a small detail, which is built into the lock body next to the disc - in the figure there is an arrow numbered 1.

We press on it, pushing inward. And at the same time we immediately pull the handle towards ourselves. She pops up. Further, the disc can be easily removed (arrow number 2), and screws appear in front of us, which, as we will see, really loosened. We twist them all the way, put the decorative circle back in place and then insert the handle itself so that the original detail that stops everything appears in its hole.

I describe this for so long, choosing words, but in practice everything is much faster and easier).

To tighten the door handle of the interior door, you need to find and tighten the bolts hidden under the decorative body. They are located under the round part that adjoins the door. To get to them, we remove the decorative body of the door handle.

On the door handle body you will find a small circle, only a couple of millimeters in diameter. This is a button, by pressing it (you can press it with a screwdriver or an awl) and pulling the handle towards you, remove the handle from the base. Now you need to remove the round part, under which the hidden bolts are located. If you can't just remove it, then look, it should have small grooves, with which you can pry this round part with a screwdriver and remove it. On one side of the door, under such a round part, we find the bolts. Tighten these two bolts so that the handle does not dangle and tighten them. Now we put on the door handle body, which we removed. Everything is ready. If everything worked out well, then the handle will not dangle.

Door handles often become faulty, however, if this trouble occurs with a recently purchased product, you have every chance of replacing it in the store.But in most cases, they break down after several years of operation, so you have to solve the problem. Stock up on a screwdriver and an adjustable spanner.

Using a screwdriver, unscrew the handle from the door leaf, while the internal elements of the lock can be left intact, you can only unscrew the screws holding the device on both sides. Using an adjustable wrench, remove the lever together with the spring-wound pivot mechanism.

Next, you need to get rid of the swivel mechanism as follows: first you need to unscrew the handle, and then the swivel mechanism and the spring. For further repair work, it is necessary to thoroughly inspect all parts and understand the cause of the malfunction. If a loose keyhole is the cause, you will be able to clearly see all the elements inside.

Having identified the malfunction, proceed to fix it in a specific order:

Use a screwdriver to unscrew the retaining ring. Loosen it slightly and remove it with your fingers.
Then you can easily separate the key washer from the torsion spring.
Next, remove the washer located on top, then the retaining ring and lastly pull out the washer located under the ring.
Inspect the washer carefully for defects, as the cause of the breakage may lie in it.

The lever can also loosen due to a malfunction in the torsion spring, that is, if it is located tightly enough, then everything is in order, otherwise it must be replaced with a new one.

You can find out about the serviceability of the spring by trying to unscrew it, if everything is fine with it, it will not succumb to your efforts. Moreover, the spring can jump out of the place where it should be located. In this case, it is sufficient to install it at its destination.

Unfortunately, replacing small elements in the door mechanism is not only laborious, but also a traumatic process. If you act carelessly, it is quite possible to injure your hand.

To replace the torsion spring, or rather to install it in the required place, proceed as follows: press the spring from above with your fingers. To do this, you will have to apply force, since the spring is difficult to compress. Next, install the key washer on top of the spring, on top of which the retaining ring is laid. Even if you can do everything yourself, all elements must be tightened additionally with a screwdriver, otherwise the mechanism will not last long.

After completing the above steps, reinstall the rotary mechanism in which the spring is installed. Remember to hold the spring with your fingers during installation. Using a wrench, secure the handle with the bolts.

If, as a result of the work done, the door mechanism has become more elastic, then you did everything right. Otherwise, you should go to the store, purchase a new pen and replace the defective product.

If you are not sure that the repair is within your power, it is advisable to call a specialist who will do all the work efficiently and in a short time, although you will have to pay for this, but there is simply no other option. As a result, you will get a working mechanism and a securely closing door.

This video should also help everyone who is going to fix a doorknob in their work.

Video (click to play).