You can unscrew the broken bolt. It's simple: how to unscrew a broken bolt. Reasons for the failure of fasteners

When it comes to car repairs, there are a lot of problems. One of these is the question of how to drill a bolt without damaging the thread, a video about which can be found on a number of resources. Therefore, it is always useful to know how to drill a broken bolt, what needs to be done for this, and how to unscrew a broken bolt without serious and unpleasant consequences for mechanisms and structures.

Break on the surface

Usually this is the easiest option for a breakdown and you can fix it without drastic measures, which can sometimes harm your car or other unit. However, before unscrewing the broken bolt, it is necessary to treat the breakage site with kerosene. This will help eliminate the burn and weaken the contact of the surfaces. Next, you need to follow the following recommendations:

Flush break

This type of breakage is considered the most difficult to repair, as it is very difficult to determine the diameter of the hole, especially when cutting fasteners. Therefore, in order to drill a broken bolt of a certain type, it is necessary to clean the surface. This will allow us to determine the gaps we need.

Often the following unpleasant situation occurs: the place of the cliff has curved shapes, which are very difficult to process and straighten. And drilling a product in a similar state is categorically not recommended, because there is a risk of completely ruining the structure. Therefore, first you need to apply a core, which prepares a place in the center of the work with a drill.

Further course of action allowing to drill a bolt broken in one way or another is similar to the option with a surface break. After creating the hole, the remnants of the thread are removed with a hook.

Bolt failure below surface

Complex fault, especially for a soft metal part. Therefore, it is very important to unscrew the broken bolt without damaging the threads in the hole. The procedure here is as follows:

If the last point could not be implemented, then the tool can become directly a bolt. However, it is not worth making excessive efforts, as there is a chance of breaking it. As a result, you can remove the old broken part and screw in new elements.

Using the Extractor

However, the surest option that will help unscrew a broken bolt is to use a special tool for this operation. It is called an extractor, it is sold in a set tools of different diameters. Outwardly, it looks like a tap, but there are no longitudinal slots on it and there is a conical notch for cutting.

You can use the extractor after a hole is drilled in the center with a diameter that will allow the tool to enter several turns. Turn it until it stops, and then until it is completely unscrewed.

So, here are some ways unscrewing broken bolted elements. Each of them should be used depending on the complexity of the breakdown and the availability of appropriate tools. But the most practical and best option is to purchase a set of extractors. They are quite practical and allow you to work with bolted parts of various sizes and with any type of thread.

Be sure to perform surface treatment, this will eliminate unnecessary contact and contamination. Good luck for loosening broken bolts, because the full-fledged operation of the entire mechanism depends on this, especially for cars! You can learn more about how to unscrew broken bolt elements using videos on specialized sites or forums!

This article will focus on such a misfortune as a broken off or rusted bolt. In general, how to unscrew a bolt with torn edges if this cannot be done with a conventional tool?

It would seem that the simplest procedure for replacing bolts becomes a problem. Often the reason for this is a stripped thread, sometimes the so-called "sticking" of the fastening material.

Unscrewing a bolt with torn edges, without damaging the outer case of the product, without certain knowledge, will not work for everyone. Therefore, it is necessary to consider in more detail the procedure for such work and explore possible methods for its implementation.

Preparatory activities

You should not start removing the damaged bolt immediately, but after completing a series of so-called preparatory procedures. The order of these works is as follows:

Basic methods for removing stripped bolts

After completing all the previously described preparatory procedures and acquiring the necessary tools, you can begin work.

Important to remember, that all supporting materials must be in good condition, otherwise the situation can only be aggravated.

There are several options for unscrewing torn bolts, consider the main ones:

Popular: Types of screwdrivers - selection, use, maintenance

In the event that none of these methods helps, other, more complex measures should be applied.

Ways to unscrew bolts with damaged edges

Failure to remove the bolt does not mean that the job cannot be done. For these purposes, there are other, more radical ways.

If the thread is completely stripped, the pipe wrench may be useless when it is impossible to approach the product due to lack of working space.

In this situation, the solution may be to independently create new edges on the bolt using a file.

The old base is ground to the desired size, and only then a ring wrench with a head of the required diameter is used.

If the fastening material is too large, then it will be useful to use a welding machine, when a metal coating is applied to the damaged edges, and only then the desired shape is cut to secure the key.

A simple and often effective way is to split the intermediate part (plastic gasket or rusty washer) between the bolt and the body with a familiar hammer and chisel.

In this case, you can strike both directly on the nut, and next to it at a certain angle, with a slope in the direction of unscrewing the bolt.

Some homeowners prefer to simply drill out a bolt with broken edges with a conventional drill.

In this case, a hole is made inside the body of the fastener, which later serves as a place for fixing a special L-shaped rod. This device will help unscrew the bolt, acting as a handle for removing it.

Sometimes a broken bolt head becomes a real problem for the owner. To extract such a product is extremely problematic, but quite real.

To unscrew the broken bolt, a special tool called an extractor will help.

Outwardly, this device has the form of a metal rod with a conical thread on the left side and a faceted base on the right.

The technology itself is not particularly complex. A hole is made at the base of the bolt., into which the tool must then be screwed counterclockwise. Further, using a standard key, it will not be difficult to remove the damaged element.

Personally, I have repeatedly encountered a problem when a bolt or stud breaks under the root. Moreover, I am not some kind of auto mechanic or locksmith. I say all this to the fact that this also happens to an ordinary person who periodically deals with technology or other technical part.
Well, since you are in such a situation, you should not despair - everything is fixable. I offer you seven ways to get out of this situation and free the thread from a piece of a stud or bolt.

Preparation before eversion of the fragment

But do not rush to immediately start unscrewing. Before that, you need to take measures that will facilitate your ongoing efforts.
First of all, we sprinkle the broken place with a penetrating lubricating fluid. It can be any "liquid key", WD-40. Let's wait a bit.

Further, in order to slightly relieve internal stresses, we will thoroughly warm up the chip and the place around with a gas burner.

Well, then let's go directly to unscrewing a piece of a stud or bolt.

Method one: flathead screwdriver and hammer

This is the easiest way, but it doesn't always work. In about half the case, the hairpin breaks off with a protruding fragment, for which you can just catch on.

We take a flat screwdriver, rest it against the shard and with shock movements at an angle in the direction of unscrewing the thread, gently turn the chip.

This method is suitable if you do not need much force to unscrew. If the effort is not enough, then go to the second method.

Method two: try to unscrew with a chisel

This method is similar to the first, but instead of a screwdriver we take a chisel. In the same way, we rest against the splinter and with percussive movements we produce eversion.

A chisel makes it possible to create more force compared to a screwdriver.

Third way: core and hammer

If the bolt fragment does not have splinters, or even breaking off occurred just below the end surface of the thread, then you can try using a core.

We rest the core against the surface of the fragment with an offset and blows at an angle, we turn it around until the fragment cannot be hooked with pliers or another tool.

Fourth way: We weld the nut by welding

In my opinion, this is the most effective and fastest option, but if you have a welding machine. Its essence is to weld a nut on top of a bolt fragment.
So, to do this, we take a nut, but not of the same size, but a couple of units larger. That is, if the broken bolt was at 10, then we take the nut at 12. This is needed for a better and larger welding spot.

Holding the nut with wire cutters, put it on the chip, but not in the center, but with an offset. We weld the stud with the nut to one side inside the nut with an electrode.
Then, after cooling, unscrew with an ordinary wrench.

Fifth method: unscrew the pin with an extractor

It will also require a specialized tool specifically designed for unscrewing broken studs and bolts - an extractor.

Kern the center of the stud so that the drill does not run when drilling starts.

We drill a hole of the appropriate diameter for the extractor.

We insert the extractor into the hole and unscrew it with a key.

Sixth method: drill a chip

The method is to pick up a drill according to the lower diameter of the thread of the stud and drill it out. A very difficult method, requires skill.
First, we go through a drill of a smaller diameter.

Then we drill as close as possible.

We knock out the fragments and remnants of the stud with a flat screwdriver.

This method of removal does not always justify the effort, but it deserves your attention.

Seventh method: drill under a clean one and insert

The most time-consuming and costly method of all. But there are times when this is the only working option to get the node back up and running.
We drill the stud clean along with the thread.

We cut a new thread with a tap.

This can be finished if the design now allows you to pick up a thicker bolt or stud. If not, we buy an insert or order from a familiar locksmith.
Lubricate the outer thread with thread locker and screw in.

We sew flush.
What method did you use? Write in the comments, I think your experience will be interesting! All the best!

The node has been restored.

If you, by virtue of your profession or hobby, are engaged in the repair of equipment, you often face the question: - how to unscrew a broken bolt, part of which is in your hands, and the other remains in the thread?

In this article, we will make a brief overview of ways to solve this problem. The choice of the method is up to you, as the skills and "arsenal" at hand are different for everyone. Let's start?!

Consider how to pull a broken bolt out of a thread with an extractor

For those who don't know, there are external and internal extractors. If the bolt is broken in such a way that it cannot be "grabbed" to, then the internal extractor may be the only solution to the problem.

The internal extractor resembles a tap. The shank (non-working part) is made "under the square"" for tools.

According to the type of working part, the extractors are divided into wedge-shaped, rod and screw (spiral).

The working part of the wedge-shaped extractor has the form of a cone with faces, the section of the rod extractor is the same along the entire length.

The screw extractor is a cone with a left or right rotation thread.

The order of work is as follows:

When starting work directly on the car, make sure that the repair site is accessible for a drill, screwdriver, etc. Well, if the question is how to get a broken bolt out of a wheel hub, the repair area is open. But if you can’t “reach” the part, don’t be lazy and do the necessary disassembly, that is, the dismantling of everything superfluous in this case.

If you do not know how to unscrew a broken aluminum bolt, using an extractor will be the best solution.

It is better to buy extractors in ""extended"" sets, ie. complete with drills and guide sleeves for them.

But, unfortunately, such a tool is not always available at the moment or it cannot be used due to the design of a particular node.

If you have problems with broken edges, we recommend choosing the best quality fasteners: https://avselectro-msk.ru/catalog/4976-bolty - bolts of suitable quality that can be bought in any quantities.

Alternative ways to unscrew a bolt with torn edges

Welding a nut as a way to unscrew a bolt without edges

This old tried and tested method led many out of a dead end during repairs.

specific case. Broken front suspension arm bolt on an old Suzuki Ignis. Moreover, the distance between the lugs of the arm of the lever did not allow either to hammer or screw the extractor into the fragment. Welding in this case is the most effective way to unscrew the broken bolt.

The essence of the reception is as follows.

We select a nut of a suitable diameter, put it on a broken bolt and weld it. If the bolt broke flush with the surface of the part, we fix the nut as accurately as possible in the center of the bolt. We cook. Carefully, without jerking, we unscrew the broken bolt by the nut.

Disconnect the battery terminals! Ensure the safety of wiring, hoses, plastic products from melting and burning!

Let's say that the extractor and welding are not available to you. Then, if the bolt broke in the thread, we apply

Drilling - a great opportunity to turn a bolt without edges

First of all, we calculate the diameter of the drill. The formula for a standard thread is simple - subtract the thread pitch from the diameter of the bolt (threaded part).

The next important point is how to avoid pulling the drill to the side? To prevent such trouble, there are conductors. The conductor (simplified) is a plate with holes. Guide bushings (sleeves) corresponding to the diameter of the drill are perpendicularly fixed in the holes. The conductor is fixed on the part, the sleeves are aligned with the holes with broken bolts. You can drill! It is the sleeve that will prevent the drill from deflecting.

The jig is indispensable if you need to remove a broken bolt from an aluminum part. Especially if it is the engine cylinder head.

You can also combine drilling with knocking out the remains of a broken bolt with a punch.

This technique is used if the threaded holes are through. Starting with a drill of the smallest diameter, we drill a chip. When the ""wall"" of it is sufficiently weakened, we remove it with a punch. Then we clean the thread with a tap.

In this way, you can, for example, get rid of fragments of the studs for attaching the exhaust pipe to the exhaust manifold on the VAZ2114-15 without removing the latter from the engine.

Heating to unscrew a bolt with stripped edges

Consider this situation - there are no extractors, welding, a conductor and good drills. How to pull out a bolt if it is broken?

You can solve the problem (and sometimes very successfully) by heating the parts red-hot. After cooling, they will become more pliable and may well be unscrewed with a chisel, center punch, etc. The described methods of unscrewing broken bolts are not an exhaustive, universal answer to problems of this kind. For clarity, watch the material in the video.

Thank you for your attention!

Almost all equipment is assembled using fasteners, where bolts or other products are used. But when it becomes necessary to unscrew them, they can turn out to be rusted and already unusable.

These elements often turn out to have torn edges, threads, or their head breaks off. Buthow to unscrew a bolt with stripped edgesso as not to spoil the whole structure?

In contact with

Why fasteners are needed

Fasteners are the most important elements of mechanical engineering, which are used almost everywhere. The most common fasteners that are threaded are:

• screws;
• bolts;
• nuts.

A bolt, like a screw, is a rod with a head that has one threaded end. Screws are usually classified into two types:

1. Adjusting, which fix the parts mutually.
2. Fasteners, which are used to connect a detachable character.

The screw heads can be cross recessed or single slotted.

As a rule, this element is necessary if you want to mount an additional element. Often a machine screw with a countersunk head is used instead of bolts, since the protruding head interferes with some mechanisms.

Most often, screws are used when it becomes necessary to fix parts that have been mounted on shafts or axles.

As for the bolts, they form a connection with a threaded hole and a nut.Hex bolthas a head on one side and a screw thread on the other. They are intended for fastening such parts that have a small thickness, or if you want to often separate the elements. That's why it's so important to know how to unscrew the stuck bolt.

Nuts are a fastener with a threaded type hole designed to transmit torque. Nuts are available in various shapes, depending on the conditions of use.

Reasons for the failure of fasteners

As a rule, the reasons why a bolt becomes unusable can be the following:

• sticking;
• displacement of parts that are fastened with the participation of bolts;
• excessive overtightening during installation;
• use of inappropriate keys;
• uneven forces during unscrewing.

Preparatory work

Depending on the reason why the bolt is not loosened, various preparatory measures may be required.

For example:

1. Open the bolt joint using a penetrating fluid that is designed to reduce friction. You can use substances such as kerosene, brake fluid or WD-40 for this purpose. To do this, you will need to apply the substance to the connection and leave for about an hour. Only after this time has passed, you can start unscrewing.
2. Some people use a hammer to knock on the bolt, but only so that the existing thread is not damaged.
3. You can try to slightly heat the element that has boiled with a burner. This procedure causes the resulting dirt and rust to burn off, after which the bolt metal becomes more pliable.

Experts answering the questionhow to unscrew a screw with torn edges, they say that this is done in exactly the same way.

How to unscrew a bolt with torn edges

Once all the preparation procedures are completed, you can proceed with the extraction, buthow to unscrew a bolt with torn edges? First of all, for this you need to purchase all the necessary tools. In order to carry out your plan, you can use the following methods:

1. Take a gas key, but it's only good if space allows. It is possible to use a gas wrench not only on bolts that have a surface with edges, but also on cylindrical ones, when the thread is completely torn off.
2. A damaged bolt can also be removed with ring wrenches, where there are different heads for torn edges. In this case, you will need to select the proper head size, otherwise it will not work.

Important! The longer the key, the easier it will be to unscrew the fastener.

If using the methods described above does not work, then you can resort to using other methods.

Prices for gas keys

gas key

How to unscrew a bolt under a screwdriver

Often the situation with bolts and screws confuses the owner, because not everyone knowshow to unscrew the bolt if it does not get out.

When there is practically no access, you can make a notch with a chisel or grinder. After the manipulation, unscrewing the bolt with a screwdriver will be quite simple.

Although in some cases this does not give the desired result, then you can take the same screwdriver, placing it at an angle, and tap it lightly. But this must be done so that the bolt begins to rotate.

To the question how to unscrew a hexagon with torn edges, experts say that this fastener can be removed by the following methods:

1. Using a needle file, which will help to get the size for the hexagon.
2. Using a TORX sprocket, but it is important that it is of the proper size.
3. A screwdriver that can be used if you first make an even notch.
4. Using an extractor that screws into the hex hole.

Bolt for internal sprocket or hex

It can be unscrewed by the following methods:

1. A flat screwdriver, but in this case you will need to make a notch with a grinder or a hacksaw. This must be done in such a way that the cut is with clear vertical walls, otherwise the screwdriver will jump off.
2. An asterisk TORX, which should not pass into the hole with slots, but should not be larger than this size. She must cut through the hat and fit tightly into it. Next, you should unscrew the bolt jerkily, because otherwise the slot may break.
3. With a drill, drill and extractors. To carry out the unscrewing procedure, you will need to drill a hole in the center and hammer an extractor of the desired size there. After that, using pliers, unscrew the element. It is very simple to carry out the unscrewing procedure using an extractor, since it has a thread that is opposite to the thread.
4. A drill with a left-hand rotation or reverse drill, the diameter of which is smaller than the deformed bolt. To carry out this procedure, you will need to drill a small hole with a thin drill and only then insert a left-hand drill. Naturally, now the drill will need to be put on the intensive rotation mode.

Attention! You can not use an asterisk that has a hole in the center, so when clogging they break.

How to loosen a hex bolt

This fastener can be easily unscrewed in the following ways:

1. With the above asterisk.
2. Using a needle file that makes the proper size for a hexagon.
3. A screwdriver, but before that, just like in the previous versions, you will need to make an even notch.
4. Extractor, the method of use of which has already been described.

How to unscrew an asterisk bolt with broken edges

To accomplish what you want to do, you need to knowhow to unscrew the sprocket bolt. After all, unscrewing such a fastener is possible in the same ways as those indicated above:

1. After making a cut, simply unscrew the bolt with a flat screwdriver.
2. Using an adjustable wrench, which is used to compress the part.
3. Using an extractor.

How to unscrew a bolt with special equipment

The bolts are unscrewed using a variety of devices, and this will allow drill out the bolt without damaging the thread, For example:

• keys;
• screwdriver;
• pneumatic wrench;
• ratchet.

But often it is not possible to solve the problem with the methods listed above, and then others will come to the rescue.tools for removing broken bolts:

1. Thin open-end wrenches, but they are categorically not suitable in the case of rusty or stuck bolts, as this breaks the edges.
2. Impact wrench.
3. Ring wrenches, which are more applicable, as they cover the head of the product more tightly.
4. Welding equipment.
5. A hex wrench that is less likely to cause edge stripping.
6. Impact wrench.
7. A multiplier that allows you to apply more force to a stuck bolt.
8. Screwdriver with a large handle.
9. Clamping tool.
10. Extractor set.
11. A hairpin, which is perfect for products that have a high hat.

Prices for wrenches

wrench

Working with a set of extractors

Initially, you will need to outline the center, for which you need a center punch and a hammer. A pilot hole is then drilled to be used by the extractor.

Attention!In this case, it is important that the axis is not displaced, and the depth of this hole should not exceed three diameters of the drill used.

The extractor will need to be inserted into the hole and slightly knocked out so that the fixation is more reliable. Only then can a tap be used to screw in the extractor. Working with it is quite simple, because after the extractor enters the product until it stops, the product will begin to turn out.

Working with welding equipment

If abroken bolt, how to unscrewit without damaging the equipment itself? The fastest way is to use welding.

To do this, take a nut of a suitable size and weld it to the broken part, but only from the inside. After that, the product can simply unscrew the fastener with a wrench.

Welding equipment makes it possible to unscrew a screw or bolt that has a broken head or edges that have been torn off.

In a situation where the head is torn off, a small amount of metal must be deposited on the remaining part, after which a regular nut should be put on and welded.

Unscrewing with a wrench

Unfortunately, this tool cannot be used if the head of the fastener has been torn off.How to unscrew a licked bolt, described in another paragraph. To unscrew it with a wrench, you need to put a suitable nozzle on it. The twisting process itself occurs due to the impact mechanism of the wrench.

The wrench itself is a device that facilitates the process of assembling and disassembling bolt-nut connections. It is very convenient if the wrench cannot be used.

As soon as the wrench is started, power is supplied to the motor, which transfers energy to the gearbox, which leads to the functioning of the chuck. Almost all devices that are designed for loosening nuts have a special spring that allows the cartridge to rotate back. This fact allows the use of a wrench not only in mechanical engineering, but also in many other areas of activity.

Often the situation arises thatbolt won't loosen what to doin that case, if there are no special skills? There are a few simple tips that make it easier to unscrew the fastener:

1. In order to carry out this procedure faster, you should preheat the element.
2. How to remove a stripped bolt? In this case, you can use a hex wrench.
3. During operation, you can use acetone or oil for lubrication.
4. The use of a drill with a reverse thread can greatly facilitate the process.
5. If there are no special tools at hand, then a core and a hammer can be used. To do this, the first one should be placed at an angle of forty-five degrees and beat on it with a hammer, but only counterclockwise.
6. If it is not possible to unscrew the element, then you will need to drill a larger hole and cut the thread again.

How to unscrew a broken nut

In order to accomplish what you want to do, you need to knowhow to unscrew a nut with torn edges. Although it is not easy, you can use a few tips from experts:

1. You will need a metal brush, which is used to clean the jammed connection. In this place, you should drop a small amount of kerosene or diesel fuel and wait twenty minutes. After that, using the spanner wrench, you should unscrew the nut.
2. You can tap the nut, but don't use too much force.
3. Using a gas wrench, as it has a stronger clamp and even round objects can be unscrewed with it.
4. The grinder, which cuts new edges, will perfectly cope with this problem.
5. At home, they often use a chisel and a hammer, with which they cut a non-working nut and then unscrew it.

All the methods described above for removing a rusted, deformed or stuck bolt will be within the power of any owner. And the listed tools and equipment can be purchased at any hardware store. It is important that too much effort is not applied during disassembly, it is better to deal with the cause of the problem and eliminate it.