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

One of the most successful tools for body repair is a reverse hammer. Reverse hammer successfully used during the repair of thresholds, arches, pillars, where there is no access from the inside. The design of the reverse hammer is very simple; the base is a steel rod with a diameter of 20 mm. and 500 mm long, a weight (bushing) is put on it; on one side, the rod is made in the form of a hook, and on the other, a washer is welded so that the bushing does not fly out, and the impact force of the return hammer is transferred to the rod.

Principle of operation; Before starting work, you must familiarize yourself with the repair area of ​​the car body; the areas to be pulled out should be cleaned down to metal and repair washers should be welded. Next, use the hook of a reverse hammer to cling to the washer and pull out the dent with light blows, repeat this operation until the dent is completely removed. To remove oblong dents and edges, a metal rod is welded through the holes by inserting several washers.

Important: Under no circumstances should you use a reverse hammer to repair large areas of the body, these are the central parts of the roof, hood and trunk lid, since as a result of welding the washers, the metal can be greatly pulled out, the result will be a disastrous part in a landfill. There are also reverse hammers with two or three weights, which allows you to adjust the impact force.

DIY reverse hammer

To make a reverse hammer, you will need a steel or stainless steel rod with a diameter of 20 millimeters and a length of 500 millimeters, a steel weight (bushing), an ebonite handle and a hook. You can make your own hook from sheet metal 4 mm thick. It should be noted that to make a vacuum reverse hammer, instead of a hook you will have to use a plunger suction cup, no matter how funny it sounds.

Important: All parts of the reverse hammer must be filed and all burrs and serrations removed. Don't forget the back hammer is a hand tool, make it comfortable to hold.

Vacuum return hammer

For body repairs without painting, vacuum reverse hammers are used, since they do not damage exterior painting car body. In addition, they can be used when repairing large areas of the body.

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 garage conditions without the use of serious equipment and with minimal material costs. Manufacturing process with all necessary elements takes about 1 hour.

Basic tools and materials for making a reverse hammer:

1. Steel rod 12 mm, about 50 cm long;
2. Electrical tape, adhesive tape;
3. Steel rod 16 mm;
4. Two large steel washers with nuts;
5. Thread cutting tool;
6. Electric welding;
7. 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. Tapping 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 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, 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.

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:

1. Tool with pneumatic mechanism.
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 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 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 using 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.

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

• Metal steel rod (or pipe) 50 cm long and 2 cm thick.
• Rubber or ebonite handle.
• Hook out of stainless steel, having 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:

1. Clean and degrease the rod and polish the surface of the part using a grinding machine.
2. 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.
3. 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.
4. 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. Weld to both ends of the element round sheets made of steel, thanks to this the palm will not jump off the weight when straightening the body.
5. 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.
6. 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 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:

1. Cleaning the damaged area down to bare metal, usually used for this grinder and sandpaper.
2. 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.
3. The staples are hooked with a reverse hammer hook.
4. 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.
5. We remove the staples by cutting or unscrewing.
6. 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 devices: 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:

1. We grind and clean the metal rod from rust and burrs.
2. We will weld a threaded fastener to the hook, and also grind a thread on the stubble on one side to create a removable connection. As an analogue, you can permanently secure the hook using welding.
3. 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.
4. 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 vacuum version 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 reverse hammer is used to remove small dents on metal parts car body, which either cannot be directly accessed or must be aligned with 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 paintwork. 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 is no complex mechanisms, it can be done 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. Clean if necessary metal pin from rust by grinding and treat the perfectly flat surface with 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 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 all the 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 action 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 metal surface 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 the 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 requiring straightening, and in in the right direction the hammer itself moves in the form of a washer, which applies force at the fixation point 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 for removing constant velocity joints from vehicle 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;
• life time;
• 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:

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

Minuses:
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.

Characteristics:

• 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.

Characteristics:
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 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 anyone who does body repairs themselves - using a reverse hammer with a replaceable attachment, 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 front side the plates need to be notched for better adhesion with the adhesive.

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 a complex operation that requires certain knowledge, special tools and equipment. 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. 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;
• 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 hitting the load on 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 pulled relatively large plot metal, you can weld several washers on one line and thread a 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 which is welded to the fixture and pulled back along with the metal, aligning it to the desired state. When using this method, you should be careful, since welding a large number of 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 with 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:

1. The handle and weight - 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 defect areas on auxiliary washers.
3. 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.

Simple kettlebell model 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:

1. 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.
2. Rubber handle. It is specially machined from whole piece or use a nozzle for something.
3. 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.
4. Welding machine. An inverter is suitable for home needs.
5. Steel washers – 2 pieces. Diameter – 3 cm.
6. 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 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.

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:

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 - so the work will pass in the best possible way and even minor defects will be eliminated.

Dents do not have the opposite effect - bulges appear on the surface of the car. Their elimination is possible. For this purpose it is used thermal effect by 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.

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.

A cold straightening tool may come in handy

This is the standard procedure described above. Let's take a closer look: the defect site is thoroughly cleaned of paint and varnish material over a larger area than necessary and the areas are carefully 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.

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. 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 a 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.

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.

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The reverse hammer is necessary tool, with which you can fix dents in hard-to-reach places on the car body. These are parts of the car where it is impossible to squeeze out a dent from the back 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 does not represent complex equipment and is not large in size. It is the reverse hammer that will be discussed in this article.

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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. Since for convenience when working it is better to have a set of hooks different lengths, as well as several bushings of different weights.

How to use

The operating principle of the reverse hammer is as follows:

1. 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.
2. Then the repaired area of ​​the body surface must be thoroughly cleaned from excess paint layer and primer down to the metal.
3. Next, you need to weld special repair brackets (washers) onto the metal surface of the dent 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 nozzle.
4. 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.
5. It is recommended to perform leveling until the damaged part of the body surface is completely eliminated.
6. 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.
7. After which the corrected surface defect should be treated with a primer and again coated with paint to match the body.

Good to know: body work reverse hammer is one of the essential 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 a special type of device being described - 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 in reverse vacuum hammer There is no need to drill or weld brackets onto the area of ​​the body to be leveled.

IN in this case Pistons 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:

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

Take note: for leveling out unevenness in difficult places hooks of the same shape and different lengths are used to eliminate defects in the most different parts car body surfaces.

However, vacuum extraction of dents is also not without its drawbacks, namely 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 paying great attention to 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. Such reliable tool To level out dents, every car mechanic who repairs cars should have one.

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

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This kind car repair As a body repair, the operation is quite complex. You will need a number special knowledge, as well as fixtures and tools. The reverse hammer plays an important role in body repair. This tool is quite simple and can be made independently without any problems. Moreover, there are many recommendations and videos on this topic, as well as drawings.

Today you will learn how to make a reverse hammer with your own hands and how to properly use it for its intended purpose.

Action

This device is used to level minor areas on deformed cars after minor accidents.

There are areas of the body that can be leveled using a simple rubber hammer, performing reverse blows. However, such access to most surfaces does not exist. This is why you need a reverse hammer. The tip of the hammer is attached to the deformation site. Using a weight at the opposite end, a jerky pulling force is applied to the surface.

Before you start making a reverse hammer for body repair with your own hands, you will need to understand how this tool works and what types of it exist. It is also recommended to make a drawing. And only after that you need to start working.

Varieties

Despite the fact that the design of the reverse hammer is quite simple, over time even it has had several modifications. One or another option is used in different cases - it all depends on skill, as well as the type of deformation. But in general, the design is always the same, the operating principle is the same. The differences lie only in the method of attaching such a tool to the body.

The simplest version of the hammer:

1. This is a metal rod, at one end of which there is a hook, and at the other - a load and a stop;
2. A hook is attached to the washer, and the washer is welded to the place of deformation by welding;
3. Provided impact forces are applied to the load, the deformation is extended to the desired moment.

But the second option (also quite simple) will differ somewhat from the first. At the end, instead of a hook, there is simple thread. In order to level the surface using such a device, a hole is made in the center of the deformation, into which the threaded end is inserted, and a nut and washer are attached to it on the reverse side.

A vacuum hammer is the most complex version of its implementation. He attached to the surface of the deformed area through rarefied air. The suction cup begins to work both in the usual way and with the help of a compressor.

Thanks to vacuum device You can repair minor body damage and keep the paintwork intact.

Manufacturing

Making such a device yourself is not that difficult. No special tools or materials are required. And it won’t take much time for this. To have a clear idea of ​​the work, you can watch a training video and also make a rough drawing.

If we talk about tools, then for work you will need the following:

1. Metal pin 50 cm long and 20 mm in diameter;
2. Weight with internal hole;
3. It is advisable to have a thread cutting tool;
4. Welding apparatus;
5. Bulgarian.

If you want to make a hammer with a hook type of fastening, then make a hook at the end of the pin. It can be made from pliers or a vice. Another option is to weld a ready-made hook from another tool.

If the tool grip is threaded, then cut the thread on the end of the pin with a special tool. There is no need to cut it much, since the metal of the body is quite thin.

When the tip is ready, a weight is placed on the pin, limited on the back side of the tool. This can be done using a threaded stop or by welding. A threaded stop is a more acceptable option, since weights can be used different weights depending on how much force is needed at the end of the tool.

Application

This tool has the following operating principle:

However, along with the advantages, such a hammer also has a number of disadvantages. Because of them, it is possible, together with the existing dent on the body remove the previously intact layer of paint. In addition, this tool is not suitable for repairing large dents on the hood, roof or trunk surface of a car. And welding staples can damage the metal, which means the part will need to be completely replaced.

Vacuum return hammer

Eat separate species device is a vacuum hammer. Vacuum straightening of a car body has its own peculiarity, thanks to which it is possible to put in order a fairly large damaged surface of the car.

Its advantage is that it has a vacuum suction cup, thanks to which there is no need to remove a thick layer of paintwork before starting body repairs. Even compared to ordinary tool no need to drill or weld staples in the area subject to repair. In this case, caps of different configurations and shapes are used. Using a vacuum suction cup, the material is well held when leveling the dent. Working with a vacuum tool will reduce work time and labor costs.

Vacuum straightening of the body is carried out as follows:

1. First, the area to be leveled is cleared of fat and warmed up;
2. The dent in the center and edges is glued with glue pens the right size. The pistons are engaged with a vacuum hammer, and the impact on the surface is quite accurate;
3. Repeat the previous two steps in turn until the surface of the body takes on its normal shape;
4. At the end, after leveling, it is well worked out using a mini-lifter, which comes complete with pistons.

Despite the obvious advantages of vacuum extraction over conventional leveling, this method of body straightening also has its disadvantages. It is not possible to completely remove the defect. Moreover, if there were cracks in the damaged area, then you risk damaging it even more. Accordingly, you need to be careful when choosing a straightening method, as well as choose the right tools for the job.

As you can see, a reverse hammer is indispensable tool for carrying out body straightening work. It has many disadvantages, which we discussed above. But despite this, only with its help can you get rid of dents in hard-to-reach places. Therefore, it must be present in the arsenal of tools of every automobile mechanic.

The reverse hammer is a metal pin 50 cm long. On one side it has an ebonite handle attached to which is attached a small steel washer. On the other hand, there is a thread for screwing in the pull-out hooks. A hammer is used to level the car body.

When carrying out repair work, a welding machine – a spotter – is required. IN modern models welding device Comes complete with a reverse hammer, which simplifies the work of leveling metal surfaces.

Types of tools

There are several types of reverse hammers:

• with pneumatic mechanism;
• spotter;
• with 2 and 3 weights for better regulation of impact force;
• vacuum return hammer.

To use the first three types of devices, the surface of the car is ground to zero, that is, complete removal of the paintwork. In the latter version, the hammer has a tip not in the form of a hook, but in the form of a suction cup.

The vacuum tool is used directly on the painted surface without disturbing the integrity of the coating or creating defects. The suction cup is attached to metal sheet, securely gripping uneven surfaces. It is very convenient to use at home, without wasting time and effort on preparing the car for repair and subsequent painting.

Principle of operation

Reverse hammer for body repairserves useful tool, removing irregularities in difficult areas of the car. These include: thresholds, arches, pillars. The equipment is used only for small, insignificant dents, but with a powerful violation of the geometry of the body, a hammer alone cannot be used.

In such cases, slipways are used. Repair using a reverse hammer is carried out as follows:

1. The area to be leveled must be cleaned and degreased.
2. Then using grinding machine remove paintwork.
3. Weld repair round washers into the cleaned area. A welding machine is used for these purposes. If a reverse hammer is included with the spotter, then the process is simplified only by changing the nozzle.
4. You need to screw a metal hook onto the end of the hammer, which is always supplied with the tool.
5. Having hooked the hook onto the washer, you need to firmly grasp the metal weight with one hand and the handle with the other. Direct the weight towards the handle with sharp movements, thereby leveling the surface of the car. The stronger the blows, the faster the defect will be eliminated.

Car body straightening

A reverse straightening hammer restores deformed surfaces to their original appearance. If there are strong body errors, internal stress arises, which subsequently forms compression and tension. Important role plays the character of the dent. For example, if irregularities form in the center of the body, new defects will begin to form during stretching.

“During straightening, it is necessary to monitor changes in the dent. To prevent the formation of new compressions, straightening should be carried out from the edges to the middle of the unevenness, moving in a circle.”

If straightening is carried out correctly, stress due to deformation will be eliminated, and the body shape will return to its original even appearance. After leveling the surface, you need to carry out the direct forging procedure.

This means that those dents that the hammer did not level due to their small size must also be smoothed out. To do this you will need a counter support and an aluminum hammer.

Do it yourself

In order to make your own tool, you will need drawings of a reverse hammer.

They indicate the optimal parameters of the device, details of connecting parts and their quantity. How to make a reverse hammer with your own hands using available materials? For this process you will need the following items:

• steel rod 2 cm thick (thinner is possible, but its service life will be shorter), 50 cm long;
• handle made of rubber or ebonite (an ordinary nozzle will do);
• stainless steel hook 4-5 mm thick;\
• welding machine;
• 2 steel washers with a diameter of 2.5-3 cm;
• weight approximately 16-17 cm long, 6 cm thick.

Tool making time is 30-40 minutes. The process is simple, so there should be no questions about how to make a reverse hammer yourself. With these items on hand, you need to do the following:

1. Clean and degrease the steel rod and, if necessary, sand the surface to a perfectly smooth surface.
2. You need to attach a hook to one end. It is best to do this using a welding machine so as not to waste time creating threads for twisting individual nozzles. After this, you need to thread one small (2.5-3 cm) washer and weld it near the base of the hook. This is necessary so that the weight does not fly to the surface being treated during operation.
3. It is necessary to make a hole in the weight with a diameter of 2.1 cm so that the part can move freely along the rod during operation. The shape of the weight should not have corners or protrusions, otherwise it will be inconvenient for the master to move it during repairs. It is advisable to weld round steel sheets to both ends so that the palm does not slip off the weight.
4. You need to insert a weight from the free end of the pin. If the movement is tight, increase the diameter by another 0.5 cm.
5. Before putting on the ebonite handle, you need to fix another washer, which will also prevent the weight from moving close to the handle. After this, you can attach the hammer handle itself.

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