Do-it-yourself sandblasting nozzle for Karcher

Operating principle of the nozzle

Whatever the sandblasting machine, the principle of its operation is as follows: as a result of the operation of the compressor, the air flow is under high pressure, due to which abrasive (usually sand) enters the nozzle of the device. The latter is fed through the outlet hole in a thin but strong stream directly onto the object being processed, as a result of which the top layer is removed.

Sandblasting for Karcher is a device that can make a high-pressure washer suitable for work like a sandblasting gun. This attachment will not replace professional equipment, but it is perfect for cleaning small surfaces. Instead of air, the charge of kinetic energy will be given to each portion of sand by water, but otherwise the principle of operation of the device will remain the same:

under the influence of the high pressure created by the compressor, water passes through the intake hole of the hose, the other end of which is placed in a container with sand;
a vacuum is created in the intake hose, which helps the abrasive move into the main hose;
After mixing sand and water, the flow is supplied through the outlet to the surface of the product.

To reduce sand consumption and increase processing efficiency, dispensers and taps can be introduced into the specified design. Typically, a sandblasting nozzle for Karcher consumes 30 kg of sand for every 0.8-1 square meter of surface.

Nozzle manufacturing process

A homemade nozzle for Karcher can turn a washing unit into a functional sandblasting unit for home use. You will need the following set of consumables:

a hose that can withstand high water pressure;
trigger hook;
dispenser to save abrasive consumption;
a nozzle into which a mixture of water and sand will come out.

Advice: if you plan to regularly use a sandblasting attachment for a Karcher, it is best to give preference to ceramics. This is due to the fact that the abrasive acts on the metal nozzle more aggressively and its service life is much shorter than that of its ceramic counterpart. The productivity of the device will depend on the quality of the nozzle.

Do not experiment with making a homemade nozzle if you are not a professional in this matter. It is necessary to accurately drill a hole with the required diameter . The market is saturated with ready-made parts and consumables of decent quality at reasonable prices, so it’s better to purchase them. In addition, the finished parts already have a trigger mechanism in the kit - a hook.

The hose you will use must be at least two meters long, durable and reinforced. A stream of high pressure water will pass through it , which will be created by the compressor. Strength is also important because the unit will work with abrasives, so a product of dubious quality will not last long.

Algorithm of actions

Using a thread, the tip is fixed to the nozzle.
A dispenser is also attached to the nozzle, which regulates the supply of sand-water mixture.
The container with sand is connected via a hose; for this, a suitable clamp and fitting are used.

Please note: the Karcher compressor creates high pressure, which will affect all elements in your structure. Therefore, they must be secured and installed securely and correctly. All parts and connections must be ensured with maximum tightness. For any connections, it is best to use sealing tape.

To save the most sand, you should prepare a special container with a grate. Above it, you need to carry out the necessary cleaning of the surface using a sandblasting nozzle . The water-sand mixture will accumulate in this container. This mixture can be used again if a reinforced intake hose is lowered into it. The grate covering the container is needed to keep waste from being cleaned so that it does not contaminate the sand and water mixture.

Application areas of the nozzle

Due to the high power of the jet, using the Karcher nozzle you can process various surfaces:

clean wood and concrete from plaster, old paint, varnishes, building mixtures;
remove rust and scale from metal;
clean various products before processing, applying protective and finishing coatings;
get rid of stubborn stains;
remove stains and drips of glue and polyurethane foam.

Making a homemade nozzle

A special nozzle for a high-pressure washer turns the latter into a good sandblasting unit; it is only important to purchase high-quality components. You will need:

reliable hose with the ability to work under pressure;
dispenser to save abrasive;
nozzle for throwing sand and water;
trigger hook;
clamp and fitting.

The quality of the nozzle will determine the durability of the nozzle and the final result, so it is better not to skimp on it. Ceramic devices fail faster than those made from tungsten and cobalt alloys. However, metal nozzles can be susceptible to rust due to the presence of water in the sink, so sooner or later any nozzle can deteriorate. For more expensive devices, the trigger is included, otherwise you will have to buy it separately.

The nozzle on a Karcher for sandblasting must include a reinforced hose at least two meters long. You should not purchase hoses without additional reinforcement of the frame - they are not capable of operating under pressure of several atmospheres. A product of dubious quality will tear quite quickly.

Algorithm of actions

To make a nozzle with your own hands, you need to proceed as follows:

fix the nozzle tip with the thread;
attach a dispenser to regulate the supply of water with abrasive to the nozzle;
combine the container with sand and the main device using a hose, clamp, or fitting of the required size.

All structural elements must be screwed tightly and correctly, because they will be influenced by the pressure created by the compressor. The joints must be completely sealed, and FUM tape can be used to strengthen them. To save money, it is better to carry out all work over a container with a grid on which the product being processed is conveniently placed. Afterwards, the water and sand can be collected and reused by lowering a hose into it to collect the solution.

Sandblasting nozzle

In order to make an attachment for a Karcher sink with your own hands, you need to have the following elements:

nozzle;
trigger;
reinforced hose;
dispenser

Sandblasting nozzle for Karcher
You should also purchase a special ceramic nozzle if you plan to use it constantly. Due to frequent use of abrasive material, a metal analogue can quickly become unusable. The ceramic option will last much longer.

Now, regarding the nozzle. This is, in fact, the basis of the nozzle for any type of sandblasting, not only when using a Karcher washing unit. Making a nozzle with your own hands is quite difficult, but still possible. To do this, you need to select a metal rod with a diameter of at least 15 mm and saw it from the middle. But since this is quite problematic, it is better to just buy a good nozzle. The operation of the entire nozzle depends on the quality of this component.

The hose must be at least 2 meters long and must be reinforced. This is due to the fact that the abrasive material, in this case sand, will quickly render an ordinary hose unusable.

As for the dispenser, it is needed for economical use of abrasive material. It should be noted that some nozzle models are sold with a trigger.

You can assemble the nozzle by following this algorithm:

a ceramic or metal nozzle is attached to the nozzle via a thread;
on the other side of the nozzle, a hose is installed using a clamp and fitting;
A dispenser is attached to the end of the ceramic nozzle.

Please note that all joints between parts must be sealed. You can seal them using a special fum tape.

Sandblasting nozzle diagram

To save sand, you can use a tank with a grate. To do this you will need a reinforced hose. Its beginning should be attached to a container with water and abrasive material. The end should go into a tray to collect waste sand. Thus, you can significantly save sand consumption.

The cleaning process is carried out using high water pressure. As a consequence of this, the sand is supplied under strong kinetic energy and simply “beats off” particles of dirt, paint, corrosion and other things.

With the help of such a simple device, you can thoroughly and quickly clean almost any surface, even after severe rust damage.

Nozzle for sandblasting machine

Recommendations for safe use of the nozzle

In order not to harm yourself, it is necessary to work with the high-pressure washer and the nozzle in compliance with safety precautions, otherwise the water-sand mixture can cause injury. The advantage of such a device over a conventional sandblasting gun is the absence of dust settling in the lungs, so there is no need for a respirator. But you need to follow these tips:

wear durable protective clothing;
wear comfortable closed shoes;
Clean products outdoors rather than indoors.

If you have a Karcher sink or its equivalent, it is not difficult to build a sandblasting unit yourself. This will save money and allow for high-quality surface treatment for every need that arises.

Sandblasting nozzle for a Karcher: do-it-yourself sandblasting from a sink

To quickly and efficiently clean surfaces from dirt, old paint and rust, it is best to use sandblasting.

This type of cleaning is carried out using special equipment - cameras, guns.

If you have a high-pressure washer, you can save on the purchase: the sandblasting nozzle on the Karcher will help in everyday life and repairs, and you can make it yourself.

Operating principle of the nozzle

Sandblasting for Karcher is a device that can make a high-pressure washer suitable for work like a sandblasting gun.

This attachment will not replace professional equipment, but it is perfect for cleaning small surfaces.

Instead of air, the charge of kinetic energy will be given to each portion of sand by water, but otherwise the principle of operation of the device will remain the same:

under the influence of the high pressure created by the compressor, water passes through the intake hole of the hose, the other end of which is placed in a container with sand;
a vacuum is created in the intake hose, which helps the abrasive move into the main hose;
After mixing sand and water, the flow is supplied through the outlet to the surface of the product.

To reduce sand consumption and increase processing efficiency, dispensers and taps can be introduced into the specified design. Typically, a sandblasting nozzle for Karcher consumes 30 kg of sand for every 0.8-1 square meter of surface.

Application areas of the nozzle

Due to the high power of the jet, using the Karcher nozzle you can process various surfaces:

clean wood and concrete from plaster, old paint, varnishes, building mixtures;
remove rust and scale from metal;
clean various products before processing, applying protective and finishing coatings;
get rid of stubborn stains;
remove stains and drips of glue and polyurethane foam.

Making a homemade nozzle

A special nozzle for a high-pressure washer turns the latter into a good sandblasting unit; it is only important to purchase high-quality components. You will need:

reliable hose with the ability to work under pressure;
dispenser to save abrasive;
nozzle for throwing sand and water;
trigger hook;
clamp and fitting.

However, metal nozzles can be susceptible to rust due to the presence of water in the sink, so sooner or later any nozzle can deteriorate.

For more expensive devices, the trigger is included, otherwise you will have to buy it separately.

The nozzle on a Karcher for sandblasting must include a reinforced hose at least two meters long. You should not purchase hoses without additional reinforcement of the frame - they are not capable of operating under pressure of several atmospheres. A product of dubious quality will tear quite quickly.

Algorithm of actions

To make a nozzle with your own hands, you need to proceed as follows:

fix the nozzle tip with the thread;
attach a dispenser to regulate the supply of water with abrasive to the nozzle;
combine the container with sand and the main device using a hose, clamp, or fitting of the required size.

To save money, it is better to carry out all work over a container with a grid on which the product being processed is conveniently placed. Afterwards, the water and sand can be collected and reused by lowering a hose into it to collect the solution.

Recommendations for safe use of the nozzle

wear durable protective clothing;
wear comfortable closed shoes;
Clean products outdoors rather than indoors.

Source: https://kraska.guru/specmaterialy/korroziya/peskostruj-iz-mojki-karcher.html

Nissan Patrol QD32 › Logbook › Sandblasting from Karcher and eliminating bugs

The patrol is a good car. But it is highly susceptible to corrosion. I wanted to treat the hidden cavities with a liquid rast-stop, and from the bottom outside with a thick one. Rust-stop is a good thing, but if it somehow stays in cracks and hidden cavities, then in open, level places it is quickly washed away, especially by reagents and petroleum products that somehow get on the asphalt (everyone has noticed that on the highway, “windshield wipers” smear on an oily film on the glass?). Therefore, I couldn’t smear it, I had to eliminate the bugs at least in open areas and paint it. This is what the frame and side members looked like before work began:

These are the worst places. At the same time, I feel the frame and side members inside with my finger through the technological holes - everything is smooth there, i.e. The paint is still in place. It’s strange, on Padzherik it was the other way around.

I was puzzled as to how to clean off the rust. It’s not realistic to use your hands; you can’t get anywhere with a drill or an angle grinder with a carriage brush. The ideal option is sandblasting. But I need a powerful compressor, which I don’t have. And then on the internet I came across a sandblasting attachment for a Karcher. This is what she looks like:

I immediately ordered it on ozone and the next day I held it in my hands. Of course, the money they ask for it (4200 rubles) is probably not worth it as a product (like all Karcher products have an inflated price tag). But looking ahead, I will say that I have never regretted the purchase, because... it saved me a lot of time and effort. All that remained was to find sand. There are no instructions for the attachment, only pictures on the box. The picture shows a bucket of abrasive and its number according to the original catalog. Having punched the number, I found out that the original abrasive comes with a fraction of 0.2-0.8mm. I started looking for fractional sand.

In our village this is a hopeless occupation. But a friend helped me by fitting an open bag from his work. This bag was enough... um... just to start