Varieties of reverse hammer

Self-manufacturing

The reverse hammer is a hand tool designed to generate a pulling force. If a conventional hammer is used to hammer or deform the surface away from itself, then the reverse action device drags the metal towards itself. Such equipment is used in body repair, in particular when straightening, and it is also used if it is necessary to pull off the bearing when it is not possible to hit it from the back side. Backhammers are rare because they are designed to perform highly specialized tasks that the average car enthusiast or locksmith does not need. The tool can be found in automotive service centers, as well as those drivers who have encountered self-straightening of the body.

How a reverse hammer is arranged and works

The reverse action hammer is a metal pin about 50 cm long. Its diameter is 20 mm. There is a handle on the back of the tool. Directly on the pin itself, a freely movable weight is mounted, made in the form of a thick-walled tube, the length of which is adjusted to the size of the palm. The front end of the hammer is fixed in various ways to the surface to be pulled. To work, you need to take the kettlebell with your right hand, and the hammer handle with your left. To create a pulling force, you need to sharply move your right hand with a weight into the handle. In this case, a blow is created, from which the hammer pin will move in the opposite direction, dragging the deformed surface with it. Thus, almost the same effect is created if it were possible to hit with an ordinary hammer from the back of the dent.

Fixation of the working end of the hammer to the deformed metal is carried out using a vacuum suction cup, glued or welded attachment. If you need to work with the edges of the car body, then hooks and clamps are used. Each type of fastening has its own advantages and disadvantages, therefore, it can only be used in certain cases.

The classical device of the simplest hammer with a reverse action is described. There are more advanced models that are equipped with additional devices that facilitate the work. Most often, they have removable attachments for fixing to the surface to be treated, as well as a set of weights of different weights. This allows you to select components to ensure more efficient work. For example, if the installed weight is too heavy, and the metal of the body is thin, then instead of a straightened dent, you will get a hump that will have to be pressed back.

How to work with a hammer

It is worth noting that the reverse hammer is one of the tools with which you need to work very carefully. If you overdo it and hit too hard, then other defects can form when leveling the dents. Body repairers do not recommend using a reverse hammer on very large dents that are present on the roof of a car or trunk. These parts are relatively easy to access, so it is quite possible to remove the inner lining and apply pressure from the back to force the metal back into place. In the same case, if a dent has formed on the side of the car, and especially on the thresholds, then the use of a hammer will be more than justified.

To carry out a neat straightening of the dent, it is necessary to fix the pin of the tool at its beginning. It is unacceptable to immediately fix on the center of the defect, since when pulling back, the metal will collapse, and sharp corners will be obtained. Often, when using a hammer on dents without sharp bends, you can level the surface so that the previous defect will be completely invisible. It does not require putty and paint.

On significant defects, you need to work slowly and smoothly. First, the rim of the dent is pulled, as a result of which its diameter and depth will gradually decrease. At the final stage, the central part is pulled. In the event that the tool is attached to the body by welding, after each pulling it is necessary to cut off the fixation and grind the seam. It is unacceptable that the remnants of build-up remain on the metal, since it acts as an additional stiffener, which interferes with work at other fixation points. The use of a reverse hammer is a lengthy process that cannot be rushed.

When using a reverse hammer with fixation by electric welding, after each welding, the metal must be allowed to cool, since the heated area stretches much more easily and does not drag the cold part of the dent along with it. It is also worth considering that it is unacceptable to start work if there is dirt, chipped paint and other layers on the surface to be treated.

Types of hammers

Reverse hammers differ from each other in the way they are fixed to the surface to be treated. According to this criterion, they are divided into types:

• Vacuum.
• With glued suction cups.
• Welded.
• Mechanical.

Vacuum Reverse Hammer

The vacuum reverse hammer is the most expensive and at the same time very effective. The tip of this tool resembles an ordinary household plunger used to clear clogged sewer pipes. At the end of the hammer there is a rubber plate that is applied to the dent. The tool is connected to, pumping out air between the rubber plate and the car body. As a result, the suction cup is securely fixed to the metal. After that, the hand clamping the weight is sharply pulled back and a reverse thrust is created, pulling out the dent.

Usually in a set for a vacuum hammer there are 3 rubber pads of various diameters. The larger one is used for processing wide dents, and the smallest one is used for small defects. Such a hammer, when connected to the compressor, creates a rather large fixing power. The plate is applied not only to absolutely flat surfaces, but also to gently sloping ones, which is especially important for cars with a streamlined body. The vacuum type tool is quite light and often weighs no more than 1.5 kg. In this case, the only inconvenience is the hose from the compressor.

The main feature of the reverse hammer on the suction cup is that it can pull the dent without the need to remove the paint layer. If the car has received an insignificant defect, then it can be fixed at minimal cost without the need for puttying and applying a varnish layer.

Reverse hammer on a glued suction cup

There are also reverse hammers that come with rubber pads. Such suction cups are glued to the car body with glue. After hardening, a hammer pin is screwed into the thread on the overlay. Further, the usual alignment is carried out by a sharp movement of the weight. After the area is straightened, the hammer pin is unscrewed, and the glued suction cup warms up. When heated, the adhesive becomes viscous and the lining can be easily removed. After that, the surface is treated with a special solvent to remove adhesive residue.

The disadvantage of this tool is that the adhesive does not set at low temperatures. In this regard, it will not be possible to carry out editing in winter without a warm box. This method allows you to level dents even without removing the paint. Suction cups are glued directly on top of the varnish layer, while not corroding or damaging it. The formula of the glue differs from the composition of the paints, so the solvent does not take them, which eliminates the risk of color smearing when cleaning the surface from the remnants of the bonding agent.

Reverse hammer with welding fixation

The most common are hammers with fixation using a welding machine. A nut is welded onto the body, into which the tip of the hammer is twisted. After that, the dent is pulled out. This tool has a number of disadvantages. This is primarily due to the fact that its application requires the presence of. When working, you must first clean the surface for straightening. A layer of paint is removed to clean shiny metal. After that, spot welding of the nut and pulling is carried out. Further, with the help of a nut, it is cut off and the surface to be straightened is ground. At the end, the fixing element is digested to another point, and the action is repeated.

In fact, after the flaw is fixed, it is necessary to carry out puttying, priming, painting and varnishing so that the straightened part becomes homogeneous with the rest of the body surface. Such a tool is used in cases where there is a significant defect. Since the fixation is carried out with the help of a welded seam, such a reverse hammer can be used even in frost, in contrast to glued suction cups.

mechanical hammer

The mechanical slide hammer is almost the same design with welded tools. The only difference is that his attachments are hooks and clips. Such a tool will not be able to straighten the central part of the dent, since the hook can only be fixed by the edges of the body. Craftsmen, who have at their disposal only a mechanical tool with hooks, can cut a hole in the body and cling to them with a hook. After the defect is corrected, the formed slots are welded and polished. Since the hooks can be twisted, it is quite possible to pick up a regular nut and weld it to the dent. Thus, a mechanical hammer can be used as a welded hammer.

The main function of mechanical hammers is to remove bearings. They are usually used to repair the chassis of a car when there is no access to the back of the bearing to make a blow. Often, the kit comes with special clamps that allow you to grab the hinge cage at 2-3 points. Thanks to this, dismantling can be carried out without destroying the old bearing.

In detail: do-it-yourself reverse hammer for body repair drawings from a real master for a website website.

Reverse hammer is a tool for car body repair and you can do it yourself.

The product consists of several parts: a handle about 50 centimeters long, two lock nuts with washers, a weight and several hooks (other attachments, depending on the intended use).

The principle of operation is that a weight fixed on a metal rod with each subsequent movement hits the lock nuts, thus affecting the fixed hook, which pulls out dents or bends in the deformed metal.

A high-quality reverse hammer can be made in a garage without the use of serious equipment and with minimal material costs. The manufacturing process in the presence of all the necessary elements takes about 1 hour.

The main tools and materials for making a reverse hammer:

1. Steel bar 12 mm long about 50 cm;
2. Insulating tape, adhesive tape;
3. Steel bar 16 mm;
4. Two large steel washers with nuts;
5. Threading tool;
6. Electric welding;
7. Vice for fixing.

The manufacturing process of a reverse hammer begins with the preparation of the material. A metal rod 12 mm thick and 50 centimeters long will be used as a handle.

1. Making a movable "weight"

The weight for the reverse hammer is made of a rod with a diameter of 16 mm. The rod is cut into 5 even parts, the length of which is 12-16 centimeters. The rods are fixed on the main handle with electrical tape, and then they are welded together with a longitudinal welding seam. It is important to consider the absence of weld slag on the surface of the handle.

No video.

2. Threading the top of the reverse hammer handle

The thread is cut under a long nut by about 2-3 centimeters along the bar. This procedure should be carried out taking into account all angles, as it depends on how strong the reverse hammer for straightening will turn out.

3. Making bent hooks for reverse hammer

These hooks are needed to align parts in different planes. The production of elements is carried out individually, depending on the needs of the user. The bending procedure is carried out with a sledgehammer and an emphasis.

4. Threading metal hooks

The ready-made hooks for the reverse hammer are also threaded in order to connect the two elements necessary for the operation of this tool with a long nut. The cutting must take place at an even angle so that the two connected parts are not skewed, otherwise the hook may break off the thread during the work process.

5. Installing lock washers on the handle

To get a high-quality universal reverse hammer, it is necessary to make reliable lock washers. These elements take most of the load during impacts, so their installation must be carried out taking into account all angles. At the end of the handle, a thread is cut into which a nut with a washer is subsequently screwed. Before installing the washer, a rubber handle made of electrical tape or rubber hose is mounted.

6. Checking the performance of the reverse hammer assembly

The manufactured reverse hammer should work without jamming and any difficulties. All mechanisms move smoothly.

The threads on the hooks and the lock nut must always be lubricated to preserve the knot mechanism.

Video: how to make a reverse hammer with your own hands?

Many motorists restore the car body with their own hands. When performing this work, in order to eliminate defects, it is necessary to use special tools, including a reverse hammer. This device can be bought, however, if body repair is performed infrequently, then it will be much more profitable to design the tool yourself.

Reverse hammer for body repair - a tool designed to remove dents from the surface of the car. As a rule, these defects cannot be corrected with conventional tools, so a reverse hammer is often used to straighten dents on the thresholds, arches and pillars of the vehicle. The tool in the classic version, is a pin 50 centimeters long. The diameter of the steel rod is two centimeters. It contains two elements: a rubber bushing on one side, and a metal washer on the other. It holds the hammer in a stable position and protects the body of the tool from vibrations resulting from impacts.

The tool is used for straightening small damages.

The device for straightening defects is equipped with additional clamps and metal hooks, with the help of which, during the straightening process, brackets welded to the car body are captured.

The use of a reverse hammer largely depends on the location and complexity of the defect. There are several types of tools:

1. Pneumatic tool.
2. Spotter.
3. Vacuum hammers.
4. With adhesive pads.

For spot straightening of dents on the surface of the body of a new car, it is recommended to use vacuum hammers. The scheme of its work is as follows: with the help of a suction cup, the tool is attached to the area to be restored, then the handle is pulled “toward itself”, and as a result, due to air compression, the dent is leveled. The principle of operation of this type of device allows you to eliminate defects without damaging the paintwork of the car body.

The use of pneumatic tools is necessary to repair serious damage. The hammer is connected to a powerful compressor, as a result, the mechanical effect on the damaged area is enhanced. The device is attached to the car body with special hooks. Before using the device, if necessary, remove the paintwork from the damaged area.

Spotter - a welding machine with which an additional element is welded to the car body. It can be an iron rod or a special hook. Then, with a reverse hammer, they cling to the protruding part, and the damaged area is leveled.

Before welding the part, the repaired area is thoroughly washed, the paint and varnish coating is removed from it and degreased.

The tool with adhesive pads is attached without the use of a welding machine. Reliable fastening is provided by a special adhesive composition, after the defect is eliminated, the overlay is cut off, and the damaged paintwork is restored.

The purpose of using a hammer is to smooth out dents. However, with its help, some parts are dismantled. So, to remove the inner bearings, use a tool that has a special pin in its design.

The finished tool is not cheap, therefore, in order to save money, many motorists design the device with their own hands. For self-creation you will need:

• A metal steel bar (or pipe) 50 cm long and 2 cm thick.
• Rubber or ebonite handle.
• Hook made of stainless steel, having a thickness of 4-5 mm.
• Welding machine.
• Two steel washers with a diameter of 2.5-3 cm.
• A kettlebell having a thickness of 6 cm and a length of 16-17 cm.

To make a reverse hammer you will need:

1. Clean and degrease the rod, use a grinder to polish the surface of the part.
2. A hook is attached to one end. In order not to waste time when creating a thread for removable nozzles, the part is welded.
3. A small washer is put on the pin, which must be welded near the base of the hook. It is used to ensure that the weight does not come into contact with the work surface.
4. A hole with a diameter of 2.1 cm is made in the weight. Due to this, the part will move freely along the rod during operation. In the manufacture of the tool, it is taken into account that the shape of the part must be without protrusions and corners. Round sheets of steel are welded to both ends of the element, thanks to which the palm will not jump off the weight when straightening the body.
5. A weight is inserted from the free end. If the part moves tightly, then the diameter of the hole is increased by another half a centimeter.
6. At the end of the work, the handle is put on, but before that, another washer is mounted to prevent the handle and weight from touching when using a hammer.

To straighten dents on the car body, various tools are used, including a reverse hammer. In many cases, it is more expedient to make it yourself. Having spent 30-40 minutes of his time, the motorist receives a tool that is simple in design but effective in straightening the car body.

What is a reverse hammer for auto body repair? Structure, principle of work. How to make a homemade tool.

When carrying out body repairs, one of the most popular tools is a reverse hammer. This device is designed to level small dents on thresholds, pillars, arches, in those places where there is no access from inside the cabin. This is one of the main tools for straightening and every bodybuilder should be able to work with it.

On the one hand, a hook is attached or welded to the rod, with which you can make a hook for the mounting loops welded to the body. On the other side, a washer is welded, which does not allow the weight to fly off, and serves as a striker, hitting which the force is transferred to the rod and then the metal surface is leveled under this pressure. If you buy a factory-made reverse hammer, then it usually comes with several interchangeable hooks for grabbing staples of various shapes. There are modifications of such hammers with two and three bushings, which allows you to control the force of impact when leveling dents.

There is another variety on the market - this is a vacuum reverse hammer for body repair. Large areas of dents are repaired with such devices, and the previous design is suitable for minor damage. Here, suction cups are used as a hook, which removes the issue of preliminary removal of the old paint layer from the part.

1. Cleaning the damaged area down to metal, usually using a grinder and sandpaper.
2. With the help of a spotter, brackets are welded to the body, in various places of damage, so that it can be gradually pulled out, restoring the shape of the body part.
3. The brackets are hooked with a reverse hammer hook.
4. With gentle, not strong movements of the kettlebell, we begin to slowly level the surface, making blows. The main thing here is not to overtighten, so as not to hammer the bulge back later. With such gradual procedures, we draw out the entire area of ​​\u200b\u200bthe damaged part.
5. We remove the staples by cutting or twisting.
6. We clean and degrease the part and you can start applying putty.

Of the main disadvantages of using a classic reverse hammer is the need to remove the old paintwork, even if it was not badly damaged. In addition, as mentioned above, this method is only suitable for small dents.

Video example of leveling a dent with a reverse hammer.

To get started you will need:

• a metal rod 50 cm long and about 20 mm in diameter.
• washer, or handle, which will serve as a chipper.
• welding machine and protective equipment: goggles, mask, overalls.
• steel hook.
• weight.
• steel washers, 2 - 3 pcs. with a diameter of 2.5 - 3 mm.

The method for assembling a reverse hammer with these components is as follows:

1. We grind and clean the metal rod from rust and burrs.
2. We weld a fastener with a thread to the hook, and on the stubble on one side we also grind the thread to make a removable connection. As an analogue, you can permanently fix the hook by welding.
3. We make a hole inside the weight 1 mm larger than the diameter of the rod so that it can freely walk along it. Next, we put it on the rod.
4. We weld the handle with a washer, against which the weight will hit, transferring thrust to the rod itself.

At this stage, the independent development of a reverse hammer for auto body repair is completed. Also, if desired, you can make a vacuum version of the tool. But here, instead of hooks and welded brackets, a suction cup will be used, which is attached to a wide dent and slowly pulled out.

Please write in the comments with a reverse hammer, which manufacturer do you use, and are you satisfied with the quality of their work? Thanks in advance for your answer, it will help a lot for newbies.

• The device and use of a reverse hammer, making a tool with your own hands
• What is a reverse hammer for body repair
• Purpose and types of reverse hammers
• How to use a reverse hammer
• We are engaged in the independent manufacture of a reverse hammer

In the process of working with a car body, the most difficult and critical part is straightening, that is, leveling the surface of the body. To perform this task, even specialists need to have professional equipment on hand, which includes a reverse hammer.

In addition to this, many reverse hammers also have hooks with which the device can grab the brackets welded to the body, and thereby hold it securely on it during straightening.

Often, a reverse hammer is used to remove small dents in metal parts of an automobile body that either cannot be directly accessed or need to be leveled from the back. With the help of a reverse hammer, it is very convenient to work with car sills, wheel arches and pillars.

There is a classification of reverse hammers for body repair, which includes:

With kettlebells(two and three are used).

Reverse hammers, working thanks to a pneumatic mechanism.

The entire process of straightening dents on a car body using a reverse hammer should be performed in the following order:

1. Rinse the entire work surface with water to remove all dirt, and be sure to treat the entire surface with a degreaser.

2. If necessary, remove the paintwork from the work surface. To do this, it is more practical to use a grinding machine.

3. Weld round repair washers to the dented area.

4. Attach a special hook to the opposite end of the hammer, which should come with the tool.

5. Attach the hook to the puck.

6. Holding the tool with one hand on the handle, grab the kettlebell with the other hand and point it towards the handle. In this case, your movement should be as sharp as possible.

Due to the fact that the reverse hammer is tightly coupled to the body surface, with each movement of the weight, the reverse dent is leveled. At the same time, the stronger you strike with a weight, the faster the process of straightening the car body will go.

When working with a reverse hammer, you must be extremely careful. In no case do not rush and after each blow evaluate how the dent has changed. This will help you avoid creating new dents at the edge of an existing defect. But if you work slowly and follow all the instructions correctly, you can fix a small dent in just a few minutes.

It is often impossible to repair a car body without a reverse hammer, although each time it is necessary to soberly assess the situation, and if the work area is too large, resort to using other tools. As for the reverse hammer, fortunately, such a tool for bodywork can be made by hand.

Reverse hammers can be bought at any auto shop today. It is worth noting that they can be sold both as a separate unit and as part of a set of tools specifically designed for body repair. But since there are no complicated mechanisms in the reverse hammer, it can be done at home.

A pin made of durable steel, 50 cm long and 2 cm in diameter.

A handle or nozzle that can be put on a steel pin. The handle should be made of ebonite or rubber.

Welding machine and protective devices for it (gloves, mask).

Steel hook no more than 0.5 mm thick.

16 cm kettlebell about 6 cm thick.

Steel washers in the amount of 2 pieces (diameter 2.5-3 mm is suitable).

We recommend that you carry out all other work on the manufacture of a reverse hammer for body repair with your own hands in the following sequence:

1. If necessary, we clean the metal pin from rust by grinding and process a perfectly flat surface with any degreasing agent.

2. A hook must be attached to one end of the pin. If the hook is threaded on one side, it can also be threaded on the pin, creating a removable connection. Otherwise, you will have to use welding to attach the hook.

3. At the base of the hook, it is imperative to place a washer, which will prevent the kettlebell from moving to the working surface and accidentally damaging it.

4. To put a weight on a metal pin, it is necessary to make a hole in it, the diameter of which should be 1 millimeter larger than the diameter of the pin. Thanks to this, the kettlebell will be able to move freely, and you will be able to give it any possible acceleration.

5. The weight is put on the pin, and steel sheets are attached on top of it, which will allow it to be gripped as reliably as possible to strike the body. On top of it, it is also worth putting on and welding another washer so that the weight does not hit the handle.

6. Proceed to fix the handle. Please note that it should sit on the pin as securely as possible, therefore, if possible, it must be welded to the base of the pin.

This completes the manufacturing process of the reverse hammer. As you can see, if you prepare materials and tools in advance, all the work will take no more than 40 minutes. With your own hands, you can even make a reverse hammer with a vacuum suction cup, which will greatly simplify the repair work on the body. To do this, instead of the hook with which the tool is attached to the work surface, it is necessary to use special suction cups that can provide the same fastening reliability.

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Every driver who has repaired his car at least once knows what a reverse hammer is. For those who hear this name for the first time, we will describe this tool in detail in this article.

The most critical part in the repair of a car body is the alignment of its surface. To straighten the body, you need to have all the necessary tools. This includes the reverse hammer.

Reverse hammer for body repair - a metal pin measuring 50 cm in length and 2 cm in diameter. There are two elements on it: a rubber bushing and a metal washer. The washer holds the sleeve and does not allow the vibrations from impacts to pass to the hammer body.

Some slide hammers may have hooks. With the help of them, the hammer captures the brackets welded to the body, holding on to it while leveling the surface of the car.

A reverse hammer with a suction cup is needed to grab the metal surface of the body. Thanks to him, it is not necessary to dismantle the parts of the car that require repair. The vacuum reverse hammer is powered by compressed air, which is produced by the compressor.

Some complex dents on a car body are straightened using one-sided spot welding. This device is called a spotter. The device instantly welds metal fasteners to the body in the damaged area and pulls out the deformed surface with a reverse hammer.

It is fixed on the surface that requires straightening, and the hammer itself moves in the right direction in the form of a washer, which applies force at the fixation point and pulls out the deformation.

A mechanical reverse hammer is a small hand-held device for straightening a car, which consists of a bar and freely attached weights with the same or different mass.

On one side of the reverse hammer there is a hook, on the other - a lock washer that prevents the weights from falling off the rod, thereby transferring the impact force to the surface that needs to be leveled.

You can remove the inner and outer bearings using a special reverse hammer. This tool performs work that requires effort from the inside.

There are also CV joint pullers with a reverse hammer, which are designed to remove constant velocity joints from vehicle drives. At the end of the puller there is a tubular nut, which must be screwed onto the thread of the CV joint and pulled out of the drive with a reverse hammer.

To do the straightening of the car body, you need to choose the right reverse hammer.

When choosing a reverse hammer, you need to pay attention to:

• maximum effort;
• structural strength;
• life time;
• model.

When buying a reverse hammer, it is not at all necessary to pay attention to its color. This does not affect the operation of this tool.

One of the best models of reverse vacuum hammer is considered Ligota ATG-6258 with a striker weight of 1.36 kg, powered by a compressor. Suitable for leveling flat surfaces. Sold in a set with three suction cups with a diameter of 50, 120, 150 mm.

Pros:
Advantages of the Ligota ATG-6258 kit:

• a light weight;
• three sizes of suction cups;
• powered by a compressor
• long service life;
• durable construction.

Minuses:
The disadvantages of the Ligota ATG-6258 reverse hammer include:

Model JTC 2503 reverse hammer for spot straightening is the best.

X model specs:

• length - 43.5 cm;
• width - 12.5 cm;
• height - 6 cm;
• weight - 2 kg;
• it is used to extract the washer welded on the body.

• compact dimensions;
• durable construction;
• long service life;
• used in auto repair.

• used only with welding machine.

Mechanical reverse hammer SOROKIN 6.121 is one of the best.

Specifications:

• weight - 9.8 kg;
• there are nozzles for a mechanical reverse hammer;
• Sold in a set of eleven pieces.

Pros:
The advantages of the SOROKIN 6.121 hammer include:

• wear resistance;
• tool strength;
• the components of the set will not be lost during transportation thanks to the case;
• long service life.

The mechanical reverse hammer of the SOROKIN 6.121 model, judging by the reviews, has no cons.

Specifications:
Using the MASTAK 100-31005C kit, the undercarriage of cars is repaired.

• reverse hammer weighing 2.5 kg;
• three-legged bearing pullers ranging in size from 15 to 80 mm;
• a ring that regulates the divergence of the legs of the bearing puller.

The whole set is assembled in a convenient plastic case.

• compact dimensions and weight;
• high wear resistance;
• tool strength;
• long service life;
• ease of use.

• the complexity of carrying out work in hard-to-reach places of the undercarriage.

Before you start repairing and straightening a car with your own hands, you need to acquire all the necessary tools. If you have neither the time nor the desire, you can simply drive your favorite car to a service station.

This device will be useful to anyone who is independently engaged in body repair - with the help of a reverse hammer with a replaceable nozzle, you can easily and quickly remove small dents in those places of the car body that are difficult to access directly (for example, arches, pillars or thresholds). And you can make such an indispensable tool in the garage from improvised materials.

As a basis for this homemade product, an old tie rod will be used, which has already “rewound” its service life. If necessary, clean the surface of the part from rust and dirt with sandpaper or a grinding wheel.

Additionally, you will need to use part of the steering tip and a steel plate with dimensions of 70x30 mm, which can be cut from the fortieth corner. Notches must be made on the front side of the plate for better adhesion with the adhesive.

We put a piece of scrap on the steering rod axis, to the upper part of which it is necessary to weld a “plug” so that the part is not removable. A part of the steering tip and a steel plate cut from a corner must be welded together perpendicular to each other.

For a detailed process of manufacturing a reverse hammer and its application in practice, see the video on our website.

Body repair is a complex operation that requires certain knowledge, special tools and fixtures. One such device is the reverse hammer. This is a simple tool that is easy to make with your own hands. For this, there are many photos and videos on the Internet. You can also download a drawing of the simplest version of the device.

This tool is a device that allows you to apply a certain force to a section of metal with limited access. A device is used to level small areas of a deformed car that have suffered from minor accidents.

Some areas of the car body can be leveled with a conventional rubber mallet, applying blows from the back side. However, most surfaces do not have such access. In such cases, a reverse hammer is needed. Its tip is fixed at the place of deformation, and with the help of the load, which is located at the other end of the device, a retracting jerky force is transmitted to the surface.

Before you make a reverse hammer, you need to describe the varieties of this tool. You will need this to make a drawing of the device you need, and then make it.

Despite its simplicity, this device has acquired several versions over time. Each option is used in individual cases, which depend on the type of damage and the skill of the specialist. In general terms, the design of this device is the same, as is its principle of operation. The differences are only in the method of attaching the tool to the body.

The most common reverse hammer is a metal rod, at one end of which there is a hook, and at the other end there is a load with a stop. The hook is hooked onto a washer welded to the place of deformation by welding. Applying shock forces to the load, the deformation is extended to the desired moment.

The second, equally simple version of the reverse hammer differs from the previous one in that at the end, instead of a hook, there is a regular thread. To level the surface with such a device, it is necessary to make a hole in the center of deformation, insert the threaded end into it, and fasten the washer and nut on it from the reverse side.

The most complex type of this device has a vacuum device at the end, which is fixed on the surface of the deformed part with the help of rarefied air. The suction cup can be actuated either by a compressor or by a conventional method. This type of fixture allows the leveler to repair minor damage to the bodywork, while preserving the paintwork of the area, if it is not damaged.

Making a reverse hammer at home with your own hands is quite simple. It does not take much time, and does not require special materials and tools. For a better understanding, you can watch a video on the Internet. A primitive drawing will also not be superfluous.

To make this tool with your own hands, you will need the following:

• metal pin about 50 cm and 20 mm in diameter;
• cargo that has an internal hole;
• threading tool (optional)
• welding machine;
• Bulgarian.

If it is decided to make a reverse hammer with a hook type of fastening, then a hook is made at the end of the pin. You can do it with a vise or pliers. Or weld a ready-made hook from another device with a welding machine.

If the tool is made with a threaded grip, then a thread is cut at the end of the pin with an appropriate tool. You should not cut a lot of threads, since the metal of the body is quite thin.

After the tip is made, a load is put on the pin, which is limited to the back of the tool. This can be done by welding, or using a threaded stop. The second method is preferable, as it will allow the use of loads of different weights depending on the required force at the end of the reverse hammer.

Again, to visually understand how this happens, the easiest way is to watch the video. If this is not possible, then the procedure for working with this device is approximately as follows:

• the tip is fixed on the deformed section of the body;
• by hitting the load on itself, the part is aligned to the desired position;
• if the effort is not enough, then the load changes to a heavier one.

When pulling a relatively large piece of metal, you can weld several washers in line and thread a pin through them. To do this correctly, it is advisable to watch a video on this topic. Then this pin is hooked with a hook, which is welded to the fixture and pulled along with the metal, aligning it to the desired state. When using this method, be careful, as welding a large number of washers can pull the metal excessively and ruin the body part.

Correction of defects in the car body is not complete without the use of special tools. In particular, a vacuum hammer or its modifications is required. The types are different, some models are created by hand. What it is, and how to make a do-it-yourself body repair tool is described in this article.

Not all body parts on a car are subject to correction from the outside. To straighten dents on thresholds, racks and arches, a reverse hammer for a spotter - a welding machine - is useful. It is a design device in the form of a pistol with a retractable electrode and an impact blank. Automation operates without the participation of the hands of the master, who only controls the keys of the device.

A conventional manual straightening hammer consists of a steel rod with a hook on one side and a steel washer on the other. The principle of operation is simple:

1. The handle and the weight - a steel washer - are the moving elements of the hammer.
2. The place for straightening and repair is initially prepared for the procedure. The hook at the end of the hammer is firmly installed in the place of the defect on the auxiliary washers.
3. By sharply moving the weight to the handle of the hammer and making strong blows, they straighten the dent.

Using models of hammers, they straighten not only dents, but also use them as a puller. For example, if you have to separate lapped parts, a reverse hammer for bearings is indispensable.

Any body work requires detailed consideration, otherwise the use of a hammer will do a disservice, forming new dents. Independently use the tool, only when there is an appropriate skill.

The locksmith industry offers several tool options. For instance:

• Reverse hammer with pneumatics. The mechanism increases the impact force, which makes the result satisfactory without long work.
• Spotter. As described above, this is a welding machine necessary for cauterizing the metal and relieving stress from it. The reverse action hammer with it does the job.
• Complete set of 2–3 weights. A large number of weights contributes to the accuracy and force of impact. Advantage in fast straightening. A homemade reverse hammer for straightening is created according to this principle and improved.
• Vacuum. Hammer, the most gentle car paintwork - it does not need to be removed from damaged areas. It is a reverse hammer with a suction cup. Repairs dents with strong air compression.

According to the model and cost. It is easy to assume that the last option is the most weighty in price.

A simple kettlebell model is available for self-assembly. It is quite possible to make a more modern reverse hammer for body repair with your own hands if you purchase accessories. Consider one of the options, which will require the following materials:

1. Steel rod. With a cross section of at least 2 cm. If this is not taken into account, then a thin rod will not last long - enough for one straightening.
2. Rubber handle. It is specially machined from a single piece or a nozzle is used from something.
3. Steel hook. At its end, a thread is cut for screwing into the pin. It is needed not only for pulling the surface out of the brackets, but also as a reverse hammer for removing nozzles - it is convenient for them to pick up obsolete parts to be replaced.
4. Welding machine. For home needs, an inverter is suitable.
5. Steel washers - 2 pieces. Diameter - 3 cm.
6. Weight. They use an ordinary headstock from a store scale, without corners and protrusions. Otherwise, it is inconvenient to use. Cross section up to 6 cm and length up to 15 cm.

To make it more convenient to assemble a handicraft model, it is better to have a drawing of a reverse hammer on hand with typical dimensions applied. So the assembly speed will surely increase. It is made as follows:

• The rod is brought into proper condition - soaked in an anti-corrosion solution, polished and degreased. It is important that the pin for the homemade reverse hammer remains level - either choose it according to this, or straighten it at the initial stage.
• One of the washers is welded onto the end of the rod so that during impacts, the weight does not fly off the rod and does not touch the surface of the car body. They immediately equip the reverse hammer with their own hands with a grip - they weld or screw a hook to the end of the rod.
• The weight is drilled through on a lathe so that the movement along the steel pin becomes unhindered. Check this immediately by putting on the weighting agent from the other end. If he walks tight, then increase the diameter of the inner hole.
• After putting on the weight, a second washer is fixed at the other end to prevent the heavy headstock from breaking the handle.
• It remains to put on the rubber nozzle and the reverse hammer for the spotter is ready. A handicraft model is tested in action on an old, unnecessary piece of iron and the shortcomings are eliminated, otherwise additional defects will appear on the car body.

To make a reverse hammer with a vacuum suction cup, you will need the same components, only a plunger is used instead of a hook - a new one, there will be no sense from the old one. First, the nozzle is “sucked” to the iron and then work begins. The advantage is that you do not have to weld additional brackets to the body, and then remove them, thereby spoiling the already ugly surface.

The model, which is a reverse electric hammer, is a variant of a straightening tool equipped with an engine. Efforts to straighten dents are practically not required - the power of the engine allows you to stretch and strike the iron with a greater amplitude than a person does.

It is not enough to make a reverse hammer with your own hands - it is important to know how to work with it in order to get a decent result, or at least not do the worst. There are several options for straightening the body, depending on the problem:

Typically, a reverse hammer is used to remove dents. It starts in a spiral - from the edges to the center. If you do the opposite, then only the center will shift, and the sides will remain concave, which makes the defect even more complex and tough, not amenable to straightening in the usual way. Therefore, skill is required in the work.

When the body profile is restored, the work cannot be considered finished - the view is not inviting. Further, direct forging takes place with the same tool, but with a smoothing nozzle in the form of a spatula and a counter support. To carry out the work, you will need a reverse hammer with a set of nozzles - this will work in the best way and even minor defects will be eliminated.

Dents do not do without the opposite effect - bulges appear on the area of ​​\u200b\u200bthe car. Their elimination is possible. To do this, thermal action is used by welding to relieve the stress of the metal in the middle, thereby making the defect ready for smoothing. The work is carried out from the edge of the red-hot swelling to its center - it is groped by hand, there it springs the most. When the contours of the body are marked, the straightening place is spilled with cold water, which will further contribute to the retraction of the metal.

The second way to fix swelling. It consists in cold straightening of the metal to the contours with the help of a support and a spade-shaped nozzle, which is put on a reverse hammer for body repair. And then the finished place is heated to smooth the contours of the installation. After that, the defect is spilled with cold water. However, this method has a significant drawback - if the metal is thin, then the temperature difference will lead to rupture and cracks.

This is the standard procedure described above. Let's consider in more detail: the place of the defect is thoroughly cleaned of the paintwork material over a larger area than necessary and the places are carefully polished. Auxiliary rings are welded to the dent, for which a reverse hammer clings for straightening. They are then beaten off. Further, by hitting the load on the limiter on the handle, they achieve the transfer of force along the rod to the dent, and thus, the tool will gradually pull out the defect.

A pulling reverse hammer is needed for vertical surfaces of a car - it is not suitable for the roof and bottom, an ordinary mallet or a standard iron tool can do it there.

Small dents are best removed with a special tool, as a hammer with a reverse blow can lead to large defects. Outwardly, the device resembles a short drill, where an electrode is inserted instead of a drill. As a result of the work, metal deposits are obtained in the center of the dent, which are then pulled out by pressing the reverse button of the device. Nuance - you can not burn the metal, so welding takes no more than 0.3 seconds, with point movements. With the skill to make a reverse hammer for a spotter with your own hands, it is possible, but not without difficulty, using a welding machine and a drill body with a retractable mechanism for this.

The complexity of the work lies in the scheme - the drawing of the reverse hammer for the spotter is not the most important part of it. The main element of such a tool is the electrical filling, which includes a transformer, stabilizer, thyristor and capacitor. If these words mean something to a home-grown master, then he can safely get to work - the diagram is attached.

After the principle of operation of the reverse hammer has been mastered in practice and the surface of the body has come into good condition, it is brought to its logical end. Such a procedure is considered to be the treatment of damage with files, after eliminating a large problem. It can’t do the job with fine grinding, so they pick up rough ones, but there is a nuance in the work - the surface is deformed by them in the absence of skills.

After straightening, it is not possible to immediately apply a primer or paintwork - defects will become visible in all their glory. Requires final body alignment. It consists in grinding the machined body with six or heptagonal discs that do not leave steps and small defects on the surface. To choose the correct grain size of the wheel or the number of revolutions of the machine, a specialist consultant of the corresponding store will help.

Reverse hammer for body repair is used when straightening cars. This design allows you to pull out dents in the work with the body before painting the car. In this material, in addition to information, photos of the assembly of the reverse hammer are presented, which independently allow you to weld it. Please note that this hammer is designed to straighten dents by welding, not suction cups!

To make a do-it-yourself reverse hammer, we need some metal. Below is a drawing with dimensions; diameters and lengths are given for this particular slide hammer. You can apply your sizes, use your pipes - the main thing is that it works!

By design, the reverse hammer should have a rod with a hook, a striker, an emphasis and a handle: with our right hand we hold the handle, with our left hand we bring the striker into translational motion, hitting the stop.

So, we will need: pieces of two pipes of different diameters (we will call them a small and a large pipe), while taking a small pipe a little longer than a large one; a piece of rod; a pair of pieces of iron from sheet iron and one of iron is thicker and another handle. I don’t indicate diameters and lengths in the text, they can be any at your discretion, but mine, see the figure above.

We cut out a round nickel from sheet iron of such a diameter as the diameter of a large pipe (the diameter is shown by the red circle in the photo above). We drill a hole in a piece of iron with such a diameter as the diameter of a small pipe. We weld a small pipe (photo above). clarification. I first cut a square a little more, drilled a hole, welded a pipe, and then made a circle out of the square - I cut it out with a grinder along the red circle.

And you can immediately cut out a circle, drill and weld it - as you wish (in the photo below there is another option for starting work).

What we got, we insert inside a large pipe and boil in a circle (in the photo above and below, shown from different sides).

We make another penny, the same as at the beginning. I did this: I cut out a larger square, drilled a hole, put it on a small pipe (see photo above), marked the diameter along the large pipe with a marker - the cut line and cut it off with a grinder. What came out is below in the photo.

We cut off a small pipe, leaving a margin of a couple of millimeters for welding - an approximate cut line in the photo below.

We fill the pipe with sand. We take dry sand. We tamp it like this: we just knock on the floor, the sand “sits down”9, add sand and tamp again.

We hammer the sand to the top and cover with a nickel (photo above). We scald everything: along the inner diameter to a small pipe and along the outer diameter to a large one.

Here's what happened (photo below), it's a striker.

At this stage of manufacturing a reverse hammer, we need a bar, a piece of iron for emphasis and a handle (photo below).

Bar. When cutting off the bar, do not forget to leave a tolerance for the bend of the hook.

Emphasis. It can be from a piece of flat iron, for example 4 mm. The emphasis should hold the impact of the striker and not bend. Nuance: I came across a piece of iron 2 mm thick - not very thick, but in the form of a bracket (Fig. Blue below).

Pen. It could be from anything. From an old grinder, from old kitchen utensils. In extreme cases, you can even weld a piece of the same small tube.

We bend the hook from the rod. About we put a striker on a bar. We insert the other end of the rod into the stop hole and weld it from the back of the stop (picture above). Then we attach the handle and also scald on the same side. Thus, all welding is carried out from the side of the hammer handle, but not from the side of the striker.

So, here's what happened, the assembled reverse hammer is ready with your own hands.

For work, you can buy cheap washers of large diameter and weld them - here in the photo below we draw out the middle rack: we welded the washers and are going to straighten the body element with a reverse hammer.

What do you need to make a reverse hammer with your own hands?

Body repair is a complex operation that requires certain knowledge, special tools and fixtures. One such device is the reverse hammer. This is a simple tool that is easy to make with your own hands. For this, there are many photos and videos on the Internet. You can also download a drawing of the simplest version of the device.

What is a reverse hammer and what is it for?

This tool is a device that allows you to apply a certain force to a section of metal with limited access. A device is used to level small areas of a deformed car that have suffered from minor accidents.

Some areas of the car body can be leveled with a conventional rubber mallet, applying blows from the back side. However, most surfaces do not have such access. In such cases, a reverse hammer is needed. Its tip is fixed at the place of deformation, and with the help of the load, which is located at the other end of the device, a retracting jerky force is transmitted to the surface.

Before you make a reverse hammer, you need to describe the varieties of this tool. You will need this to make a drawing of the device you need, and then make it.

Varieties of reverse hammer

Despite its simplicity, this device has acquired several versions over time. Each option is used in individual cases, which depend on the type of damage and the skill of the specialist. In general terms, the design of this device is the same, as is its principle of operation. The differences are only in the method of attaching the tool to the body.

The most common reverse hammer is a metal rod, at one end of which there is a hook, and at the other end there is a load with a stop. The hook is hooked onto a washer welded to the place of deformation by welding. Applying shock forces to the load, the deformation is extended to the desired moment.

The second, equally simple version of the reverse hammer differs from the previous one in that at the end, instead of a hook, there is a regular thread. To level the surface with such a device, it is necessary to make a hole in the center of deformation, insert the threaded end into it, and fasten the washer and nut on it from the reverse side.

The most complex type of this device has a vacuum device at the end, which is fixed on the surface of the deformed part with the help of rarefied air. The suction cup can be actuated either by a compressor or by a conventional method. This type of fixture allows the leveler to repair minor damage to the bodywork, while preserving the paintwork of the area, if it is not damaged.

Self-manufacturing

Making a reverse hammer at home with your own hands is quite simple. It does not take much time, and does not require special materials and tools. For a better understanding, you can watch a video on the Internet. A primitive drawing will also not be superfluous.

To make this tool with your own hands, you will need the following:

• metal pin about 50 cm and 20 mm in diameter;
• cargo that has an internal hole;
• threading tool (optional)
• welding machine;
• Bulgarian.

If it is decided to make a reverse hammer with a hook type of fastening, then a hook is made at the end of the pin. You can do it with a vise or pliers. Or weld a ready-made hook from another device with a welding machine.

If the tool is made with a threaded grip, then a thread is cut at the end of the pin with an appropriate tool. You should not cut a lot of threads, since the metal of the body is quite thin.

After the tip is made, a load is put on the pin, which is limited to the back of the tool. This can be done by welding, or using a threaded stop. The second method is preferable, as it will allow the use of loads of different weights depending on the required force at the end of the reverse hammer.

Again, to visually understand how this happens, the easiest way is to watch the video. If this is not possible, then the procedure for working with this device is approximately as follows:

• the tip is fixed on the deformed section of the body;
• by hitting the load on itself, the part is aligned to the desired position;
• if the effort is not enough, then the load changes to a heavier one.

When pulling a relatively large piece of metal, you can weld several washers in line and thread a pin through them. To do this correctly, it is advisable to watch a video on this topic. Then this pin is hooked with a hook, which is welded to the fixture and pulled along with the metal, aligning it to the desired state. When using this method, be careful, as welding a large number of washers can pull the metal excessively and ruin the body part.

Sgdubrovsky › Blog › Reverse hammer. The dream came true.

Hello everyone.
For a long time I wanted to make myself a reverse hammer, but there was no way.

Yesterday I freaked out and rushed to the base for metal.
Bought:
1. Round rod d=10mm

1.5 meters;
2. Round rod d=16mm

1.8 meters;
3. Nut M10 - things 4;
4. Nut M10 long - 2 pcs;
5. Nut M12 - a couple of things;
6. Washer for 10 - 2 pcs;
7. Washer for 12 - 2 pcs;
8. M10 plate, step 1.5.

Not all nuts and washers came in handy ...,

“By eye” we choose the length of the bar by 10 - it will be the base of our hammer and we saw it mercilessly.

Then at the end of the rod we cut the thread with a die.

I cut it, attached it to the main rod, tightened it around with masking tape and grabbed it with welding. Then he took it off, boiled it tightly.

After we put the moving part in place, we screw the nut onto the thread by 10 and scald it - we get the upper limiter.

How to use a reverse hammer for straightening a car

One of the indispensable tools for straightening a car is a reverse hammer for body repair. Its purpose is to correct small dents on the pillars, sills, arches, i.e., in areas where there is no access from inside the body. This device will be discussed in this article. First, let's talk about how this device looks like.

What does he represent?

By design, the reverse hammer is quite simple. Its base is a metal rod with a diameter of 10-20 mm and a length of about 50 cm. A steel bushing (weight) is put on the rod.

At one end, the rod has the shape of a hook, at the other, a washer is welded so that the weight does not fly off, and the impact force of the device is transferred to the rod. Often, in the configuration of industrial hammers, there are several different-shaped hooks that are needed to capture staples welded to the repaired area. There are also reverse hammers on sale with two or three bushings. This makes it possible to adjust the impact force when leveling dents.

How to use a reverse hammer?

1. First you need to inspect the repaired section of the car in order to select a hook according to the shape of the dent and calculate the degree of application of force.
2. After that, the area of ​​the body surface that needs to be repaired must be cleaned from paint and primer to metal.
3. Next, special repair washers (brackets) must be welded to the dent.
4. Then the hook of the tool is hooked onto the staples.
5. Then, with light and gentle blows, you need to start pulling out the dent.
6. This process must be continued until the damage is repaired.
7. In order to remove the elongated edges and dents, it is necessary to weld several brackets, and then, by inserting a hammer rod through their holes, remove the defect.
8. After that, the straightened area can be primed and re-coated with paint matching the body color.

Among the disadvantages of this device, it should be noted that the paint has to be removed from the dent, even if it has not been damaged. In addition, large damage with its help can not be repaired.

Conventional slide hammers are highly discouraged for large dents when repairing the central sections of the hood and roof, as well as the trunk lid of a car. The result of welding staples can be a strong deformation of the metal and its stretching. As a result, the part will have to be replaced completely.

There is a special kind of the device described - a vacuum-type reverse hammer. Its distinctive feature is that with its help it is possible to repair a vast area of ​​the car body. In addition, before working with it, you do not need to remove the paint.

How to make a fixture yourself?

1. To make this device with your own hands, you will need an iron, or even better, a steel (stainless) rod 50 centimeters long and a cross section of 10-20 millimeters, as well as a steel sleeve (weight), a hook and an ebonite handle.
2. You can either purchase a ready-made hook-grab or make it yourself from steel with a thickness of 4 millimeters.
3. To make a vacuum version of a reverse hammer, you can use a suction cup from some tool, such as a conventional plunger, instead of gripping.
4. After you assemble the fixture, carefully process all its elements, first with a file, and then with an emery cloth in order to remove all notches and burrs.
5. After that, try out the new tool on some unwanted car parts.

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Reverse hammer for straightening metal - how to do it yourself and how to use it for its intended purpose

The contact of the tool with a crumpled body is a couple of millimeters, but this is enough to level the dent

No car service or body repair shop is complete without reverse hammers or similar devices. I will talk about what a reverse hammer is, how to work with it and how to assemble it with your own hands. I am sure that such a tool will take its rightful place on the shelf in your garage and will be useful for body repair.

Everything you need to know about the tool

To straighten such a dent, you need to remove the entire bumper, and this is long and difficult - it is much faster and more convenient to pull the plastic towards you

If a dent appears on the car body, then it's time to purchase a reverse hammer or make it yourself. After all, it is this tool that will help level the metal surface to its original state.

This tool is a type of hammer that strikes not like a jackhammer, but from the surface, pulling it towards itself. The device of the tool is extremely simple - a weight freely walks along the rod, and the rod is equipped with a handle.

The drawing shows the main elements in the design of the straightening hammer - the blue arrow indicates the movement of the load

The rod is made of a metal rod or a metal thick-walled tube with a diameter of 2 cm and a length of 50-80 cm. A kettlebell is a cylinder 15-20 cm long and weighing 300-500 grams. A through hole passes through the cylinder, through which the rod moves freely.

• A handle is rigidly fixed at one end of the rod. The handle is made of metal or a metal guard is provided on it, which accounts for the impact;
• At the end opposite the handle is a suction cup or point for spot welding. Despite the simplicity of the tool, the price of the fixture starts at 2 thousand rubles (prices are current for the spring of 2017).

Why is not an ordinary impact hammer used for straightening body parts, but a reverse one? Given the nature of the damage in a dent, it is possible to eliminate the defect by exerting a mechanical load on the metal in the right direction. It is impossible to get behind the damaged body element in order to knock it out in the opposite direction.

By choosing an impact tool, the damaged metal on the body element can be pulled out easily and quickly. Moreover, the body element does not even have to be removed, since all the work can be done directly on the machine.

Disassembling the drum brake assembly is not an easy task until you try to use a reverse hammer on the spotter.

An alternative way to use the tool is to remove brake drums from soured studs. There is no other tool to approach here, and by welding a reverse-action hammer or screwing it with a bolt, dismantling can be done simply and quickly.

Varieties of the tool according to the method of attachment to the surface

Types and their description

Surface preparation. The damaged surface of the body is treated with a wire brush on a grinder, until the paint is completely removed. After rough removal, the metal is skinned with coarse sandpaper.

Before you start working as a spotter on the body, be sure to remove the negative terminal from the battery!

Pull out the metal. The tip of the tool is set at the beginning of the dent, that is, where the metal is just beginning to bend. Here you need to put a mark and grab the limit switch with spot welding.

We give the metal to cool, then with a weight we strike the handle with force. Repeat the blows until the metal bends.

We break off or cut off the welded limit switch and weld it again 1-2 cm further along the dent, and continue to pull it out.

metal cleaning. After the entire dent is pulled out, we clean the protrusions from spot welding with a grinder. We regularly apply a wide spatula or ruler and, if necessary, additionally remove the protrusions.

Application of a spotter hammer. Everything is simpler here - an electric limit switch is applied to the metal, a button is pressed on the handle and you can strike.

At the end of the metal drawing, the body element also needs to be cleaned from the welding relief.

The reverse hammer is an indispensable tool for straightening metal. It is often used in auto repair shops to smooth out dents in car bodies. For example, such body parts as fenders, sills, car doors simply cannot be tapped with an ordinary hammer, since there is no access to them from the inside. For such purposes, the reverse hammer serves.

The principle of its operation boils down to the fact that the working side of the hammer is fixed to a dent in the body (it is simply welded or hooked to special brackets). Then the weight, located on the axis of the hammer, hits the base of the handle on its opposite side, thus directing the force of impact in the right direction and leveling the dent.

To make a hammer you will need:
- Kettlebell, weighing 2 kilograms;
- Metal rod;
- Pen;
(can be used from a broken power tool: drills, grinders, etc.)
- Drill, with a drill for the diameter of the rod;
- Welding machine.

To begin with, a piece of rod of the desired length is cut off. The surface of the rod must be smooth, without rust and bumps, so that the weight can move freely along it.

Then a washer is welded to one end. It will serve as an emphasis for the pen: