What is a reverse hammer for auto body repair? Structure, principle of operation. How to make a homemade instrument. Do-it-yourself reverse hammer for a car body Straightening reverse hammer

Correcting car body defects is not complete without the use of special tools. In particular, a vacuum return hammer or modifications thereof are required. The types are different, some models are created. What it is and how to make a tool with your own hands is described in this article.

What is a straightening hammer and what is it used for?

Not all parts of the body can be repaired with outside. For sills, pillars and arches, a reverse hammer for a spotter - a welding machine - will come in handy. The device is a pistol-shaped design with a retractable electrode and an impact blank. Automation operates without the participation of the master’s hands, only operating the keys of the device.

A typical hand straightening hammer consists of a steel rod with a hook on one side and a steel washer on the other. The operating principle is simple:

The handle and weight - steel washer - are the moving elements of the hammer.
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 defect areas on auxiliary washers.
By sharply moving the weight towards the handle of the hammer and making strong blows, the dent is straightened.

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

Any body work requires detailed consideration, otherwise the use of a hammer will do a “disservice” by creating new dents. They use the tool independently only when they have the appropriate skill.

Types of straightening hammer

The locksmith industry offers several tool options. For example:

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

Accordingly, models and prices. It is easy to assume that the last option is the most expensive.

How to make a hammer model yourself

Simple kettlebell model available for self-assembly. Make a more modern reverse hammer for body repair with your own hands, it is quite possible if you purchase components. Let's consider one of the options, which will require the following materials:

Steel rod. With a cross-section of at least 2 cm. If you do not take this into account, the thin rod will not last long - enough for one straightening.
Rubber handle. It is specially machined from a single piece or an attachment from something is used.
Steel hook. A thread is cut at its end for screwing into the pin. It is needed not only for pulling the surface by the brackets, but also as a reverse hammer for removing injectors - it is convenient for them to pick up obsolete parts that need to be replaced.
Welding machine. For home needs.
Steel washers – 2 pieces. Diameter – 3 cm.
Weight. Use a regular headstock from a store scale, without corners or protrusions. Otherwise it is inconvenient to use. Section up to 6 cm and length up to 15 cm.

To make it more convenient to assemble a makeshift model, it is better to have on hand a drawing of a reverse hammer with applied standard sizes. This will certainly increase the build speed. It is made as follows:

The rod is brought into proper condition - soaked in an anti-corrosion solution, ground and degreased. It is important that the pin for the homemade reverse hammer remains level - either it is selected according to this, or it is straightened at the initial stage.
One of the washers is welded onto the end of the rod so that when struck, the weight does not fly off the rod and touch the surface of the car body. Immediately equip the reverse hammer with a grip with your own hands - weld or screw a hook to the end of the rod.
The weight is drilled into lathe all the way through so that movement along the steel pin becomes unhindered. Check this immediately by putting on the weighting material from the other end. If he walks slowly, then increase the diameter of the internal hole.
After putting on the weight, a second washer is fixed at the other end to prevent the heavy headstock from breaking the handle.
All you have to do is put on the rubber nozzle and the reverse hammer for the spotter is ready. The makeshift 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.

Rubber attachment on the end of a body repair tool

To make a reverse hammer with a vacuum suction cup, you will need the same components, only instead of a hook you use a plunger - a new one, the old one will be of no use. First, they “suck” the nozzle onto the iron and then begin work. The advantage is that you don’t 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 version of a straightening tool equipped with a motor. There is practically no effort required to straighten dents - the power of the engine allows you to pull out and strike the iron with a greater amplitude than a person can do.

Straightening technology

It’s not enough to make a reverse hammer with your own hands - it’s 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:

Removing large dents

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 will make the defect even more complex and rigid, and cannot be straightened in the usual way. Therefore, the work requires skill.

When the body profile is restored, the work cannot be considered finished - the view is not conducive. Next, direct forging occurs with the same tool, but with a smoothing attachment 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 attachments - this way the work will go well and even minor defects will be eliminated.

Eliminating bulges on the body

Dents are not without reverse effect– bulges appear on the area of the car. Their elimination is possible. This uses heat through welding to relieve the stress of the metal in the middle, thereby making the defect ready to be smoothed out. The work is carried out from the edge of the red-hot swelling to its center - it is felt by hand, where the spring is greatest. When the contours of the body are marked, the straightening area is shed cold water, which will further promote the retraction of metal.

The second way to fix bulges. It consists of cold straightening the metal to its contours using a support and a shovel-shaped attachment that is placed on a reverse hammer for body repair. And then the finished place is heated to smooth out the contours of the installation. After which 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.

Correcting dents with a pulling hammer

This is the standard procedure described above. Let's look at it in more detail: the area of the defect is thoroughly cleaned of paint and varnish material over a larger area than necessary, and the areas are thoroughly sanded. Auxiliary rings are welded to the dent, onto which the reverse hammer for straightening clings. They are then beaten off. Then, by hitting the load on the limiter on the handle, the force is transferred along the rod to the dent, and thus the tool will gradually pull out the defect.

A pull-out reverse hammer is needed to vertical surfaces car - it is not suitable for the roof and bottom; an ordinary mallet or a standard iron tool will do the job.

Electropulling

It is better to pull out small dents with a special tool, since a hammer with a reverse blow can lead to large defects. Externally, 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. A nuance - you cannot burn through the metal, so welding takes no more than 0.3 seconds, using point movements. If you have the skill to make a reverse hammer for a spotter with your own hands, it is possible, but not without difficulties, using a welding machine and a drill body with a retractable mechanism.

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

Fine body straightening

After the principle of operation of the reverse hammer has been mastered in practice and the surface of the body has reached a usable condition, it is brought to its logical conclusion. This procedure is considered to be treating the damage with files, after eliminating big problem. Fine grinding will not do the job, so they select coarse ones, but there is a nuance in the work - they deform the surface if there is no skill.

Final processing of the body

After straightening, it is not possible to immediately apply a primer or paint coating - the defects will become visible in all their glory. The body needs to be finally put in order. It consists of grinding the treated body with six or heptagonal discs that do not leave steps or small defects on the surface. A specialist consultant at the relevant store will help you choose the correct grain size of the wheel or the number of revolutions of the machine.

WATCH VIDEO INSTRUCTIONS

In conclusion, it is important to say that it is not difficult to make a reverse hammer for your own needs and thereby restore your own car.

It is important to collect the available information and isolate the worthwhile nuances from it - then working with the tool will not become a burden, and the result will exceed expectations.

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

What is a reverse hammer

A body repair hammer is a tool designed to remove dents from the surface of a car. As a rule, these defects cannot be corrected with conventional tools, so a reverse hammer is often used for arches and racks vehicle. The instrument has a classic design and 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 tool body from vibrations resulting from striking.

The tool is used for straightening small-area damage.

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

Species

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

Tool with pneumatic mechanism.
Spotter.
Vacuum hammers.
With adhesive pads.

For spot-pointing a new car, it is recommended to use vacuum hammers. The way it works is as follows: using a suction cup, the tool is attached to the area to be restored, then the handle is pulled “towards you”, and as a result, due to air compression, the dent is leveled. The operating principle 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 powerful compressor, as a result, the mechanical impact on the damaged area increases. The device is attached to the car body using special hooks. Before using the device, if necessary, remove the paintwork from the damaged area.

A spotter is a welding machine that is used to weld additional element. This can be an iron rod or a special hook. Next, use a reverse hammer to cling to the protruding part and level the damaged area.

Before welding the part, the area to be restored is thoroughly washed, the paint coating is removed and degreased.

Tools with adhesive pads are attached without the use of a welding machine. Reliable fastening is ensured by a special adhesive composition; after eliminating the defect, the overlay is cut off and the damaged paintwork is restored.

The purpose of using a hammer is to smooth out dents. However, it can be used to dismantle some spare parts. So, to remove internal bearings, use a tool that has a special pin in its design.

Self-production

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

Metal steel rod (or pipe) 50 cm long and 2 cm thick.
Rubber or ebonite handle.
Stainless steel hook with a thickness of 4-5 mm.
Welding machine.
Two steel washers with a diameter of 2.5-3 cm.
A weight 6 cm thick and 16-17 cm long.

To make a reverse hammer you will need:

Clean and degrease the rod and polish the surface of the part using a grinding machine.
A hook is attached to one of the ends. In order not to waste time when creating threads for removable nozzles, the part is welded.
A small washer is put on the pin, which needs to be welded near the base of the hook. It is used to ensure that the weight does not come into contact with the working surface.
A hole with a diameter of 2.1 cm is made in the weight. Thanks to this, the part will move freely along the rod during operation. When making a 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 this the palm will not jump off the weight when straightening the body.
A weight is threaded from the free end. If the part moves slowly, then the diameter of the hole is increased by another half a centimeter.
At the end of the work, the handle is put on, but before that another washer is installed to prevent contact between the handle and the weight when using a hammer.

Used to straighten dents on a car body. different instruments, including a reverse hammer. In many cases, it is more advisable to make it yourself. Having spent 30-40 minutes of his time, the motorist receives a tool that is simple in design but effective.

A reverse hammer is an essential tool that can be used to repair dents in hard to reach places car body. These are parts of the car where it is impossible to squeeze out a dent from reverse side.

These mainly include the arches, sills and pillars of the car. Such equipment is used for minor damage to a specific area, which does not require replacement of the entire fragment.

This tool is not complex equipment and is not large in size. It is the reverse hammer that will be discussed in this article.

Classmates

What kind of device is this

If you are at least a little familiar with plumbing, then creating such a tool at home will be quite simple for you.

Making such a device yourself will not take much time, and will not even require special equipment or knowledge. For a more visual understanding, we present a primitive drawing that will not be superfluous.

As noted above, the design of such a hammer is very simple. A metal sleeve is mounted on a steel rod 50 cm long with a diameter of 10 to 20 mm, which should be easy to grip by hand.

The diameter of its hole should allow it to slide freely along the hammer rod without creating a large backlash. A handle is installed on the top to hold the tool by hand. An impact washer is tightly attached to the rod in front of the handle.

Another safety washer is attached at the bottom, which prevents the bushing from flying off the rod during operation, thereby causing additional damage to the leveled surface. And at the very tip of the tool there should be a hook for grabbing staples.

If you decide to make such a hammer yourself, rather than buy it in a store, where the price will be much higher, then it is advisable that the hook and bottom washer be removable. Because for convenience when working, it is better to have a set of hooks of different lengths, as well as several bushings of different weights.

How to use

The operating principle of the reverse hammer is as follows:

First of all, you should inspect the damaged area of the car, select the appropriate hook based on the location and main dimensions of the dent, in order to then correctly calculate the accuracy of the applied force.
Then the repaired area of the body surface must be thoroughly cleaned from excess paint layer and primer down to the metal.
Next, you need to weld on metal surface dents with special repair brackets (washers) using a welding machine. If the electric spotter comes complete with a reverse hammer, then during the leveling process you only need to change the attachment.
Then you need to hook the hook of the auto tool onto the brackets, and then begin to pull out the dent with gentle and light blows.
It is recommended to perform leveling until the damaged part of the body surface is completely eliminated.
To get rid of dents on your car, you first need to weld some brackets and push a hammer through their holes to remove the damage.
After that, the corrected surface defect should be treated with a primer and re-coated with paint to match the body.

Good to know: A body work reverse hammer is one of the most important tools designed to remove irregularities in hard-to-reach areas of the car.

However, it is worth paying attention to the fact that such a device has its drawbacks, due to which, along with the dent on the car body, a layer of paint that was not even damaged is completely removed. In addition, areas of extensive dents in the hood, roof and surface of the trunk of a car cannot be straightened with its help. Welding staples can greatly deform the metal, which will ultimately lead to a complete replacement of the part.

Vacuum device

I would like to add special kind The described device is a vacuum return hammer.

It is interesting to know that vacuum body straightening has characteristic feature, which makes it possible to repair a considerable area of the damaged surface of the car.

The advantage of such a reverse hammer is the vacuum suction cup, with the help of which you will not need to remove the thickness of the paintwork from the car before starting body repairs. When working with a reverse vacuum hammer, there is no need to drill or weld brackets onto the area of the body to be leveled.

In this case, caps of any shape and configuration are used. Using a vacuum suction cup, the material is held firmly while leveling out the dent. Working with such a tool reduces labor costs and production time.

Restoring the body using vacuum straightening occurs in several stages:

Cleaning the surface from grease and warming up the area for leveling.
Two specially selected glue pins are glued in the center and along the edges of the dent.
The piston is hooked with a vacuum hammer, gently acting on the leveled area.
Repeating the two previous steps until the surface takes the desired shape.
Thoroughly modify the leveled surface with a mini-lifter, which is sold in a set with pistons.

Take note: To level out unevenness in difficult places, hooks of the same shape and different lengths are used, allowing you to eliminate the defect in the most different parts car body surfaces.

However, vacuum extraction of dents is also not without its drawbacks, which is that it does not completely eliminate the defect. In addition, if the damaged areas of the car have cracks, then such straightening can damage it more. Therefore it is worth great attention consider the method of carrying out body repairs and the selection of appropriate tools.

However, when performing auto body repair work to remove dents in difficult places where there is no access from inside the car, only a reverse hammer will help you. Every car mechanic who repairs cars should have such a reliable tool for leveling dents.

How to make a reverse hammer from scrap materials, see next video:

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Auto repair shops that practice body repair always have a special set of tools and special equipment for repairing dents without straightening and painting the metal. And although damage of a serious nature, and even located over a large area, cannot be corrected without the use of powerful bench stands, it is quite possible to pull out dents in small areas with difficult access. To do this, you just need to use a special small-sized auto tool called a reverse hammer.

Using a reverse hammer

The reverse hammer can be called one of the the best tools for car body repairs. It is also often used to repair arches, sills or pillars where access from the inside of the part is impossible. The device is very simple, and operation does not require much skill.

There are the following types of hammers - pneumatic reverse instruments and reverse hammer spotters. There are also hammers with two and three weights, thanks to which you can adjust the force of impact. Besides standard version There is vacuum equipment that also removes dents. The advantage of this reverse hammer is that it has a suction cup. It acts as a grip on equipment and does not damage the paintwork of the body.

Carrying out straightening involves a number of tools, in addition to the basic ones - a straightening hammer, a file, a machine tool, a saw, a stand and spacers, an electric reverse hammer, a reverse hammer. Often a reverse hammer is used in conjunction with other tools to resistance welding. As a rule, the back hammer is included in the straightening kit, which is usually included with the welding machine.

A back hammer is often included in bearing removal kits. They are intended for use in automotive workshops for the purpose of removing various parts by gripping their internal location using a reverse hammer. Grips of a special design fit tightly to the bearings, allowing you to remove the bearings without damage and evenly, as well as turning the handle clockwise. Thus, the purpose of the hammer may be different, but the price of the reverse hammer remains the same.

Reverse Hammer Design

The design of this tool is very simple - it has a steel rod with a diameter of 20 millimeters and a length of 500 millimeters (base) and weights mounted on it that are loosely mounted on it, as well as a hook and a washer. On the base there is a weight or several weights, which may differ in weight. On one side of the rod there is a hook, and on the other there is a washer, which prevents the weight from flying out and transfers the force of the impact of the reverse hammer to the rod.

A modern tool is equipped with several types of grips, which allow it to be used for leveling damaged areas, in particular dents, in various areas of the body. At successful combination There is quite a lot of weight and length that can be knocked out - from the crumpled sills to the crumpled double metal that is in the rear fender. During repairs, reverse hammers are often used in conjunction with a spotter.

Working with a reverse hammer

Before you start working with this tool, you need to become familiar with the damaged area of the car body (or other object). Places that are subject to pulling should be thoroughly cleaned down to the metal, degreased, and a primer and subsequent painting should be applied to them. Next, you need to drill a small hole and weld special repair washers. Often, such reverse hammers, no matter how much you would like to carry out painting work later, are the only solution for body repair. After these steps, a hammer is attached to the damaged area.

Use the hook of the tool to hook onto the washer and pull out the dent with gentle, light blows. This action should be repeated until the dent is completely leveled and removed. After a series of procedures, part of the body is subject to mandatory painting. To remove long dents and edges, you should weld several washers and insert a metal rod through the holes.

It is very important to remember that a standard hammer cannot be used to repair areas that are too large, such as the center of the roof, hood and trunk lid. In these places, the metal can be pulled out too much by welding washers, so the part will simply have to be thrown away.

The use of a reverse hammer requires the creation of a paint coating on the surface. But there are hammers that are equipped with pneumatic suction cups, for the use of which there is no need to make holes in the metal and thereby save the machine from unnecessary painting work. This option is recommended for repairing large areas. To create pneumatic fixation to the surface, it is necessary to supply compressed air, so during operation the vacuum hammer is connected to a special compressor.

Making a reverse hammer with your own hands

The technology for creating a reverse hammer at home is quite simple. Before you start, you need to be well prepared. You must carefully plan and think through your work in advance. You should prepare a steel or stainless steel rod, the diameter of which is 20 millimeters and the length is 500 millimeters. You will also need a steel weight and a hook. A standard reverse hammer is very quick to make - you will only spend thirty minutes creating it.

Let's look at a drawing of a reverse hammer, where you can use available tools. Let's say you have a very thick pipe, e.g. ski pole and a weight with a hole in the middle for attaching to this pipe. At one end of the pipe you need to make a limiting area for the load that will knock on it, and attach a hook or another version of the hook to the other side.

Instead of a hook, you can use a hairpin that has a long thread. In this case, the pin must be pulled into the hole in the body, and a temporary fixing nut must be screwed on the back side through the washer.

Many people have a question: how to attach replaceable attachments? The answer is very simple. The pipe should only end with a threaded rod. Likewise, the nozzle should have the same pin at the end. To connect them, you can screw about 10 nuts onto one stud and weld them together.

When the hook catches on the metal of the body, you should use the weight of the load on the pipe, that is, you must accelerate the load in your direction. It will hit a limiting platform, which can be a large washer welded to the pipe. A strong shock will appear, which will be transmitted to the pulled metal. Builders recommend using a load weighing at least three kilograms.

You can make a hook from sheet metal, the thickness of which is about four millimeters. If you want to make a vacuum reverse hammer with your own hands, you should use a suction cup from a plunger instead of a hook. The beauty of vacuum blowback hammers is that they do not disturb the exterior paint of the vehicle.

When creating a reverse hammer, experts advise processing each part with a file. It is also necessary to remove all nicks and burrs. Remember that the reverse hammer is hand tools, so try to make it as comfortable and pleasant for your hands as possible.

Body straightening at home

A car with smooth and even shapes involuntarily attracts the gaze of passers-by. Nobody wants to drive with dents on the body and asymmetry. Motorists know that damaging the body is easy. This is caused by branches, fencing, small traffic accidents, accidentally fallen objects, etc. To restore the car to its former beauty, it is necessary to carry out straightening, which will return your car to its original attractive appearance.

Straightening involves restoring the deformed shape and individual body parts. This problem You can fix it at home yourself, so as not to overpay for the services of specialists. A homemade reverse hammer is ideal for these purposes.

So, you need to extend or straighten the concave areas. If a car part is severely damaged, it is better to simply replace it with a new one and not waste extra time on repairs that may not work. desired result. Before starting work, the paint is removed and putty and grout are performed. Some experts heat the metal to a reddish hue before tapping, but it is important not to overheat or melt it.

After this, the straightening process is carried out. To tighten the metal, you need to get a blowtorch or torch. When the bulge warms up, the borders should be covered with a wet rag. The metal will contract due to temperature changes. Carefully inspect all dents, be sure to evaluate their complexity and size. The large dent is aligned along the edges, and the small one in the middle.

Along with dents, cracks may also appear on the car, so you need to get a welding machine. To carry out quality work You'll probably need a spotter, a sharp-faced hammer, and a scoring block. Perhaps you should acquire some more tools that are necessary only for your case.

Many people prefer vacuum body straightening at home, which can remove dents without painting, and in a matter of seconds. It works using special vacuum suction cups and can be used even on large, flat dents. The disadvantage of vacuum straightening is that it cannot completely get rid of the defect. Additionally, if the damaged surface has cracks, vacuum straightening can further damage it.

Therefore, you should carefully consider the method of straightening and the choice of tools. After using the reverse hammer, it is necessary to fill the holes or weld them. Then the repaired part should be rubbed down and paint applied to it. Deep and small dents that have strong stretching, in addition to standard work by pulling and tapping, require pulling off excess metal.

In some cases, it is necessary to cut off stretched areas and apply patches using a spotter (welding machine). Tapping is done using a reverse hammer. Usually the deformed body element is removed, but if this is not possible, the dent can be squeezed out with a special spoon. This technique is often used if it is possible to get close to the concavity through the skin. But if this option is no longer available, you have to drill holes on the damaged part and select through them, using special tools.

A back hammer is one of the most important tools for car body repairs. In cases where access from inside absent - it is simply irreplaceable. Any craftsman knows how to make a reverse hammer at home in about an hour. If you carefully select parts and strictly follow all stages of assembly, you can make a reliable tool that will complement your home collection.

Details: do-it-yourself reverse hammer for body repair, drawings from a real master for the website website.

A reverse hammer is a tool for auto body repair and you can make 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 attached to a metal rod hits the locking nuts with each subsequent movement, thus exerting an impact on 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 costs on the material. The manufacturing process, if all the necessary elements are available, takes about 1 hour.

Basic tools and materials for making a reverse hammer:

Steel rod 12 mm, about 50 cm long;
Electrical tape, adhesive tape;
Steel rod 16 mm;
Two large steel washers with nuts;
Thread cutting tool;
Electric welding;
Vise for fixation.

The process of manufacturing 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 pieces, the length of which is 12-16 centimeters. The rods are secured to the main handle using electrical tape, and then they are welded together longitudinally 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 recoil hammer handle

The thread is cut for a long nut about 2-3 centimeters along the rod. This procedure should be carried out taking into account all angles, as this determines how strong the reverse straightening hammer will be.

3. Making bent hooks for a reverse hammer

These hooks are necessary for aligning 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 using a sledgehammer and a stop.

4. Threading metal hooks

The threads are also cut on the finished hooks for the reverse hammer in order to use a long nut to connect the two elements necessary for the operation of this tool. Cutting should take place under at an even angle so that the two connected parts are without distortions, otherwise the hook may break off the thread during the working process.

5. Installing lock washers on the handle

To obtain a high-quality universal return 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. A thread is cut at the end of the handle onto which a nut and washer are then screwed. Before installing the washer, a rubber handle made of electrical tape or rubber hose is mounted.

6. Checking the functionality of the reverse hammer assembly

The completed return hammer should work without jamming or any difficulties. All mechanisms move smoothly.

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

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

A body repair hammer is a tool designed to remove dents from the surface of a car. As a rule, these defects cannot be straightened with conventional tools, so a reverse hammer is often used to straighten dents on the sills, arches and pillars of a vehicle. The instrument has a classic design and 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 tool body from vibrations resulting from striking.

The tool is used for straightening small-area damage.

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

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

Tool with pneumatic mechanism.
Spotter.
Vacuum hammers.
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 way it works is as follows: using a suction cup, the tool is attached to the area to be restored, then the handle is pulled “towards you”, and as a result, due to air compression, the dent is leveled. The operating principle 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, which increases the mechanical impact on the damaged area. The device is attached to the car body using special hooks. Before using the device, if necessary, remove the paintwork from the damaged area.

A spotter is a welding machine with which an additional element is welded to the car body. This can be an iron rod or a special hook. Next, use a reverse hammer to cling to the protruding part and level the damaged area.

Before welding the part, the area to be restored is thoroughly washed, the paint coating is removed and degreased.

The purpose of using a hammer is to smooth out dents. However, it can be used to dismantle some spare parts. So, to remove internal bearings, use a tool that has a special pin in its design.

The finished tool is not cheap, so in order to save money, many motorists construct the device with their own hands. To create it yourself you will need:

Metal steel rod (or pipe) 50 cm long and 2 cm thick.
Rubber or ebonite handle.
Stainless steel hook with a thickness of 4-5 mm.
Welding machine.
Two steel washers with a diameter of 2.5-3 cm.
A weight 6 cm thick and 16-17 cm long.

To make a reverse hammer you will need:

Clean and degrease the rod and polish the surface of the part using a grinding machine.
A hook is attached to one of the ends. In order not to waste time when creating threads for removable nozzles, the part is welded.
A small washer is put on the pin, which needs to be welded near the base of the hook. It is used to ensure that the weight does not come into contact with the working surface.
A hole with a diameter of 2.1 cm is made in the weight. Thanks to this, the part will move freely along the rod during operation. When making a 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 this the palm will not jump off the weight when straightening the body.
A weight is threaded from the free end. If the part moves slowly, then the diameter of the hole is increased by another half a centimeter.
At the end of the work, the handle is put on, but before that another washer is installed to prevent contact between the handle and the weight when using a hammer.

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

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

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

In fact, the structure of a reverse hammer for body repair is quite simple. It consists of a metal rod with a diameter of 10–20 mm and a length of about 50 cm. A steel weight (bushing) is placed on this rod, due to the weight and impacts of which the damaged area of the part is gradually leveled.

On one side, a hook is attached or welded to the rod, with which you can hook onto the mounting loops welded to the body. On the other side, a washer is welded, which prevents the weight from flying off, and serves as a bumper, hitting which the force is transferred to the rod and then the metal surface is leveled under this pressure. If you buy a factory reverse hammer, it usually comes with several replacement hooks for grabbing staples. various shapes. There are modifications of such hammers with two and three bushings, which allows you to control the impact force when leveling out dents.

There is another type on the market - a vacuum reverse hammer for body repair. With the help of such devices, large areas of dents are repaired, and the previous design is suitable for minor damage. Here, suction cups are used as a hook, which eliminates the issue of first removing the old paint layer from the part.

The technology for working with a reverse hammer is as follows:

Cleaning the damaged area down to bare metal, usually used for this grinder and sandpaper.
Using a spotter, staples are welded to the body in various places of damage so that they can gradually be pulled out, restoring the shape of the body part.
The staples are hooked with a reverse hammer hook.
Using gentle, not strong movements of the weight, we begin to slowly level the surface, making blows. The main thing here is not to overtighten, so as not to drive the bulge back in later. Using these gradual procedures we pull out the entire area of the damaged part.
We remove the staples by cutting or unscrewing.
We clean and degrease the part and you can start applying putty.

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

Video example of leveling a dent with a reverse hammer.

You can buy such equipment in almost any auto store, and often such a hammer comes complete with other equipment, the same spotter. But due to the simplicity of the design, it will not be difficult to make a reverse hammer with your own hands.

To get started you will need:

metal rod 50 cm long and about 20 mm in diameter.
a washer or handle that will serve as a bump stop.
welding machine and protective equipment: glasses, 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 from these components is as follows:

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

At this point, the stage of independent development of a reverse hammer for auto body repair is completed. If desired, you can also make a vacuum version of the tool. But here, instead of hooks and welded staples, 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 the work they carry out? Thanks in advance for your answer, it will help newbies a lot.

Design 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 self-production reverse hammer

Many drivers, when faced with the concept of “reverse hammer,” do not understand what it is. Although, if you have never had to do body repair yourself, there is a high probability that you have never seen such a tool. But if you still have to repair the body, you cannot do without a reverse hammer. In this regard, the purpose of the article below is to tell not only what a reverse hammer is, but also how to make a reverse hammer for body repair with your own hands.

In the process of working with a car body, the hardest and most important 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 classic version a reverse hammer is a pin made of metal and 50 centimeters long. The diameter of this pin is only 2 centimeters. There are only two elements on the pin: on one side there is a rubber bushing, and on the other there is a small metal washer. The task of the latter is to hold the bushing and prevent vibrations from impacts from transferring to the hammer body.

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

Often, a back hammer is used to remove small dents on metal parts of a car body that either cannot be accessed directly or need to be leveled from the reverse side. Using a reverse hammer is very convenient for working with car sills, wheel arches and pillars.

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

With weights(two and three are used).

Reverse hammers operating thanks to a pneumatic mechanism.

The specificity of straightening work depends on the type of reverse hammer. To level the surface of the body of a new car, it is better to use a vacuum return hammer, since only it allows such difficult work without first removing the paintwork. In the same case, if you are going to use one of the remaining types of hammers, the part of the body where the dent is located will first need to be thoroughly cleaned using sandpaper. Otherwise, the paintwork will still be damaged by the reverse hammer.

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 contaminants, and be sure to treat the entire surface with a degreaser.

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

3. Weld round repair washers to the area with the dent.

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

5. Hook the hook onto the washer.

6. While holding the tool by the handle with one hand, grab the weight 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 of your movements with the weight, the reverse dent is leveled. At the same time, the harder you hit the weights, the faster the process of straightening the car body will go.

You must be extremely careful when working with a reverse hammer. Do not rush under any circumstances 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 remove 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 body work can be made with your own hands.

Today, reverse hammers can be purchased at any auto store. It is worth noting that they can be sold either as a separate unit or 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 made at home.

To make your own body repair tool, you will need to prepare some materials:

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

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

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

Steel hook no more than 0.5 mm thick.

A 16cm weight is about 6cm thick.

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

We recommend doing all other work on making 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 it perfectly flat surface any degreaser.

2. A hook must be attached to one end of the pin. If the hook has a thread 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. It is necessary to place a washer at the base of the hook, which will prevent the weight from moving to the working surface and accidentally damaging it.

4. To put a weight on a metal pin, you need 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 weight 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 on top of it they are attached steel sheets, which will allow you to grab it as securely as possible to strike the body. It is also worth putting and welding another washer on top of it 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, so if possible it should be welded to the base of the pin.

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

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

The most important part in car body repair is leveling its surface. To straighten the body you need to have everything necessary tools. This includes a reverse hammer.

A reverse hammer for body repair is 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 bushing and prevents vibrations from impacts from transferring to the hammer body.

Some reverse hammers may have hooks. With their help, the hammer grabs the staples welded to the body, holding on to it while leveling the surface of the car.

Removing dents on parts of the car body that are difficult to access, or leveling is required from the back side, is carried out with a small-sized reverse hammer. The value of this type of reverse hammer lies in the presence of a vacuum suction cup, thanks to which there is no need to remove the paintwork from the car before starting repairs.

A reverse hammer with a suction cup is needed to grip the metal surface of the body. Thanks to it, there is no need to dismantle parts of the car that require repairs. The vacuum return hammer operates from compressed air, which is produced by a compressor.

Some complex dents on the 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 using a reverse hammer.

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

Mechanical return hammer - small hand tool for straightening a car, which consists of a rod and loosely mounted weights with the same or different masses.

On one side of the reverse hammer there is a hook, on the other there is a lock washer, which prevents the weights from falling from the rod, thereby transferring the impact force to the surface requiring alignment.

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 equal joints. angular velocities from car drives. At the end of the puller there is a tubular nut that must be screwed onto the CV joint threads and pulled out of the drive with a reverse hammer.

To straighten a car body, you need to choose the right hammer.

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

maximum effort;
structural strength;
service life;
model.

When buying a reverse hammer, it is not at all necessary to pay attention to its color. The operation of this tool does not depend on this.

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

Pros:
Advantages of the Ligota ATG-6258 kit:

light weight;
three sizes of suction cups;
runs on a compressor;
long service life;
robust design.

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

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

X model characteristics:

length – 43.5 cm;
width – 12.5 cm;
height – 6 cm;
weight – 2 kg;
used for pulling out washer welded on the body.

compact dimensions;
robust design;
long service life;
used in car repair.

Used only with welding machine.

The mechanical reverse action hammer SOROKIN 6.121 is one of the best.

Specifications:

weight – 9.8 kg;
there are attachments for a mechanical reverse hammer;
Sold in a set of eleven pieces.

Pros:
The advantages of the SOROKIN 6.121 hammer include:

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

Judging by the reviews, there are no downsides to the mechanical reverse hammer model SOROKIN 6.121.

One of the best models of a reverse hammer for bearings is considered MASTAK 100-31005C.

Specifications:
Using the MASTAK 100-31005C kit, car chassis can be 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 bearing puller legs.

The entire set is collected in a convenient plastic case.

compact size and weight;
high wear resistance;
durability of tools;
long service life;
ease of use.

the difficulty of carrying out work in hard-to-reach places of the chassis.

Before you start repairing and straightening a car with your own hands, you need to acquire all the right 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 everyone who independently carries out body repairs - using a reverse hammer with 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 sills). And you can make such an indispensable tool in the garage from scrap materials.

As the basis for this homemade product, an old steering rod will be used, which has already “rewinded” its service life. If necessary, clean the surface of the part from rust and dirt using 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. On the front side of the plate you need to make notches for better adhesion with adhesive composition.

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

For a detailed process of making a reverse hammer and its practical application, watch the video on our website.

Body repair is complex operation, which requires certain knowledge, special tools and devices. One such device is a reverse hammer. This is a simple tool that is easy to make with your own hands. There are many photos and videos for this 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 an area 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 regular rubber hammer, using blows from the reverse side. However, most surfaces do not have such access. In such cases, a reverse hammer is necessary. Its tip is fixed at the point of deformation, and with the help of a load located at the other end of the device, a pulling jerk force is transmitted to the surface.

Before making a reverse hammer, it is necessary to describe the types of this tool. This will be needed 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 outline The design of this device is the same, as is its operating principle. The only differences are in the method of attaching the tool to the body.

The most common reverse hammer is a metal rod with a hook at one end and a weight with a stop at the other. The hook hooks onto a washer welded to the deformation site. By applying impact forces to the load, the deformation is stretched to the desired point.

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

The most complex type of this device has a vacuum device at the end, which is fixed to the surface of the deformed part using rarefied air. The suction cup can be driven either by a compressor or by the usual method. This type of device allows the straightener to correct simple damage to the body, and at the same time preserve 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 clearer understanding, you can watch a video on the Internet. 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;
a load that has an internal opening;
thread cutting tool (optional);
welding machine;
Bulgarian.

If you decide to make a reverse hammer with a hook type of fastening, then a hook is made at the end of the pin. This can be done using a vice or pliers. Or use a welding machine to weld a ready-made hook from another device.

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

After making the tip, a weight is put on the pin, which is limited on the back side of the tool. This can be done by welding, or using a threaded stop. The second method is more advantageous, since it will allow you to use weights of different weights depending on the required force at the end of the reverse hammer.

Again, to clearly 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 a deformed area of the body;
by striking the load towards itself, the part is leveled to the desired position;
if the effort is not enough, then the load is changed to a heavier one.

When pulling out a relatively large section of metal, you can weld several washers on one line and thread the pin through them. To do this correctly, it is advisable to watch a video on this topic. This pin is then hooked onto a hook that is welded to the fixture and pulled back along with the metal, aligning it to the desired position. Be careful when using this method, as welding large number washers can excessively pull the metal and damage the body part.

Correcting car body defects is not complete without the use of special tools. In particular, a vacuum return hammer or modifications thereof are required. The types are different, some models are created by hand. What it is and how to make a tool for body repair with your own hands is described in this article.

Straightening tool (hammer with additional parts)

Not all parts of the car body can be repaired from the outside. To straighten dents on sills, pillars and arches, a reverse hammer for a spotter - a welding machine - is useful. The device is a pistol-shaped design with a retractable electrode and an impact blank. Automation operates without the participation of the master’s hands, only operating the keys of the device.

A typical hand straightening hammer consists of a steel rod with a hook on one side and a steel washer on the other. The operating principle is simple:

The handle and weight - steel washer - are the moving elements of the hammer.
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 defect areas on auxiliary washers.
By sharply moving the weight towards the handle of the hammer and making strong blows, the dent is straightened.

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

Any body work requires detailed consideration, otherwise using a hammer will do a disservice by creating new dents. They use the tool independently only when they have the appropriate skill.

The locksmith industry offers several tool options. For example:

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

Vacuum tool– very convenient and practical to use

Accordingly, models and prices. It is easy to assume that the last option is the most expensive.

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 components. Let's consider one of the options, which will require the following materials:

Steel rod. With a cross-section of at least 2 cm. If you do not take this into account, the thin rod will not last long - enough for one straightening.
Rubber handle. It is specially machined from a single piece or an attachment from something is used.
Steel hook. A thread is cut at its end for screwing into the pin. It is needed not only for pulling the surface by the brackets, but also as a reverse hammer for removing injectors - it is convenient for them to pick up obsolete parts that need to be replaced.
Welding machine. An inverter is suitable for home needs.
Steel washers – 2 pieces. Diameter – 3 cm.
Weight. Use a regular headstock from a store scale, without corners or protrusions. Otherwise it is inconvenient to use. Section up to 6 cm and length up to 15 cm.

To make it more convenient to assemble a makeshift model, it is better to have a drawing of a reverse hammer with standard dimensions on hand. This will certainly increase the build speed. It is made as follows:

The rod is brought into proper condition - soaked in an anti-corrosion solution, ground and degreased. It is important that the pin for the homemade reverse hammer remains level - either it is selected according to this, or it is straightened at the initial stage.
One of the washers is welded onto the end of the rod so that when struck, the weight does not fly off the rod and touch the surface of the car body. Immediately equip the reverse hammer with a grip with your own hands - 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 material from the other end. If he walks slowly, then increase the diameter of the internal hole.
After putting on the weight, a second washer is fixed at the other end to prevent the heavy headstock from breaking the handle.
All you have to do is put on the rubber nozzle and the reverse hammer for the spotter is ready. The makeshift 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.

Rubber attachment on the end of a body repair tool

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, while the sides will remain concave, which will make the defect even more complex and rigid, and cannot be corrected in the usual way. Therefore, the work requires skill.

Dents do not have the opposite effect - bulges appear on the surface of the car. Their elimination is possible. This uses heat through welding to relieve the stress of the metal in the middle, thereby making the defect ready to be smoothed out. The work is carried out from the edge of the red-hot swelling to its center - it is felt by hand, where the spring is greatest. When the contours of the body are marked, the straightening area is spilled with cold water, which will further facilitate the retraction of the metal.

A cold straightening tool may come in handy

A pull-out reverse hammer is needed for vertical surfaces of a car - it is not suitable for the roof and bottom; a regular mallet or a standard iron tool will do the job.

The complexity of the work lies in the diagram - the drawing of the reverse hammer for the spotter is not its most important part. The main element of such a tool is the electrical filling, which includes a transformer, stabilizer, thyristor and capacitor. If these words mean anything 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 reached a usable condition, it is brought to its logical conclusion. This procedure is considered to be treating the damage with files after eliminating the major problem. Fine grinding will not do the job, so they select coarse ones, but there is a nuance in the work - they deform the surface if there is no skill.

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