Vacuum cleaner attachment for dust-free drilling. Nozzle for a construction vacuum cleaner for removing dust when drilling holes
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Modern building tools have a lot of additional functions. It is they who allow them to stand out from their own kind and attract buyers. In addition to the fact that modern rotary hammers combine the functions of both a jackhammer and a drill, they also allow you to quickly change cartridge nozzles, select an operating mode, and control the quantitative indicators of rotations and impacts.
In addition to these, among the additional functions you can often find the presence of a built-in vacuum cleaner. This feature deserves closer attention.
What is it for?
Many do not even think - why do you need a vacuum cleaner function in a puncher.
It's no secret that dust appears during the operation of the perforator. Its quantity and composition depends on the material with which the work is carried out. Someone will consider the presence of dust not so much an inconvenience, but you should not underestimate it either.
- There are also very small particles in the dust that settle on the skin and clothes of a person. If they are constantly inhaled, respiratory diseases, as well as allergic reactions, may occur. In addition to the vacuum cleaner, be sure to use a respirator and protective clothing.
- This affects the comfort of the person. Working in dust is not very pleasant, and it is simply impossible to hold a regular vacuum cleaner and work with a rotary hammer at the same time. For people whose daily work is connected with this tool, the presence of a dust collector in it will greatly facilitate the work.
- Small particles of dust adversely affect the work of the construction tools themselves. For example, the anther on the cartridge may fail.
- After any work performed by a conventional puncher, a thorough cleaning is needed.
Even if you only need to drill a couple of holes, then you will have to wipe off the dust not only on the floor, but also on other surfaces. To minimize this step, choose a model with a dust collector.
To make working with tools comfortable, do not neglect the function of the built-in vacuum cleaner. It will not be superfluous even with minor modifications, and for professionals it is simply necessary.
Kinds
All perforators with different types dust collection systems can be divided into professional and amateur (for home use). Professional due to the high power and weight are designed for certain types of work. Tools for regular use often combine several modes, they are less powerful, and they are light in weight. Naturally, the cost of the former is many times higher.
Only a person who uses a puncher regularly, on a professional basis, can afford to buy them. With the help of the latter, it is quite possible to make simple repairs with your own hands or periodically make several holes for household needs. Devices for collecting dust and small debris can be of different designs.
- Special dust extraction system to which you can connect construction vacuum cleaner. Their main advantage is high power and the ability to absorb a large amount of debris. Portable construction vacuum cleaners do not greatly affect mobility and convenience. More bulky industrial models of vacuum cleaners often have sockets for power tools, which is also convenient. In this case, each device works autonomously.
- Built-in vacuum cleaner, the work of which is directly related to the engine of the puncher. It can be completely removable or only part of the container (bag) for collecting garbage. Such a dust collector partially conceals the power of the perforator and affects its wear resistance. This system is suitable for tools with light to medium characteristics.
- dust collectors. The essence of the action of which is that they do not allow small particles to scatter in different directions and detain them inside the chamber. Usually these are plastic nozzles in the form of a cone (they are also called dust caps) or a cylinder. They come in solid or ribbed cuffs that can compress slightly to provide a snug fit. Some of them still have an entrance to which you can connect the hose of a conventional household or construction vacuum cleaner. The choice of such dust collectors depends on the type of cartridge, tool model and the maximum possible hole parameters (depth and diameter).
In addition to the above positions, there are universal devices suitable for both a hammer drill and a drill and a screwdriver. They are attached to the wall in the manner of a suction cup, and a construction vacuum cleaner creates a draft for dust.
Popular Models
To make the advantages and disadvantages of rotary hammers with vacuum cleaners more clear, we will consider several popular models.
- Bosch GBH 2-23 REA proved to be exceptionally good. The design of the vacuum cleaner can be easily removed. Inside you can see a filter and a container for collecting small construction debris, which is quite easy to clean. Without a filter, the tool works like a regular hammer drill with two modes. It copes well with the declared functions, holds more than 90% of dust and is convenient for transportation.
The only complaints were that in the connected state such a unit is quite heavy and it is not as convenient to hold it as without additional parts. And yes, it's a bit overpriced.
- MAKITA HR2432 impresses with reliability and good performance. The dust collector can be detached - then you get just a good puncher. The bag is very roomy, even with intensive work it can be emptied once every two days. Unlike other analogues, the garbage does not spill out when the unit is turned over. Particularly noted is the convenience when working with the ceiling - dust does not fly into the eyes and cleaning is practically not needed.
Complaints are caused by the fact that it captures only small particles. Large pieces will have to be removed manually.
The storage container is large enough to store the drill fully assembled.
These two models with dust extraction are not the only ones, there are not many of them on the market, but there is a choice.
However, the choice of tool depends on the planned work.. To hang several pictures, you can take the first model. For larger actions, the second one is better suited.
How to do it yourself?
The choice of a dust collector largely depends on its cost. It is not always possible to make an expensive purchase. And when buying it is difficult to take into account all the nuances.
If you have a hammer drill without a vacuum cleaner, you can purchase a dust collector separately. Or make it yourself without spending effort and money.
The easiest option with the horizontal position of the puncher is to make a pocket in place of the future hole. Plain paper and masking tape work well for it.
With the vertical position of the perforator, when debris flies from above, this method is not suitable. Here you can use any plastic utensils - be it a glass or a cut bottle. In the bottom you need to make a hole equal to the diameter of the drill. During operation, if the length of the drill is insufficient, the cup is crushed, but keeps the bulk of the debris inside.
A hammer drill is very often used to process materials that produce a huge amount of dust when drilling or chiselling. These conditions contribute to the wear of the tool, its aggregate parts. It is in order to reduce the negative impact on the perforator that the dust collector was created. If we talk about factory devices, then they are active and passive. Active ones have their own drive, but the cost of the tool increases, and significantly. Passive ones take power from the engine.
Everyone decides for himself whether to install dust collectors or not. Some use a vacuum cleaner, but this is not always convenient, you have to hold the punch with one hand. There are many others homemade devices, which we will discuss below.
Homemade dust collectors
For a long time, paper and tape were considered the simplest dust collector - simpler design it simply doesn't and never will. From these materials, you can make a simple envelope that is glued in place of the future hole. Dust settles inside the envelope, but if drilling is carried out vertically, then you can use a glass of paper. The disadvantages include the fact that part of the dust will still fly out under the influence of air. The advantages include simplicity and low cost.
Often use the cut bottom of a plastic bottle.
If we look at the device of the perforator, we will pay attention to the fact that its engine is equipped with a fan for cooling during operation. This device can be used to make a dust collector on a puncher. To do this, you can take a hose and a plastic polypropylene corner for a 20 mm pipe and drill a hole in it for a drill. Then you need to take the container under the dust and make a hole in it for the suction device of the perforator. Dust goes into the box when drilling.
Factory type dust extractor
The factory-type dust extraction system can be included in the kit or sold separately - it all depends on the wishes of the buyer. The undoubted advantages include replaceable filters, the ability not to violate the integrity of the tool, ease of use. There is only one significant drawback - the device is powered by the main engine of the puncher.
Do-it-yourself dust extractor
A vacuum cleaner hose can be attributed to independent means, albeit primitive. It is quite easy to use and does not require any financial costs. The hose can be placed next to the hole. But there are drawbacks to this method. For drilling with heavy hammers, help will be required, and some of the dust will still enter the room.
Important! Recently, so-called vacuum dust collectors have appeared. They are made of durable housing and last a long time.
Conclusion
To summarize, it is better to stop the choice, of course, on factory dust collectors, since they are convenient, compact and do not require additional work for manufacturing and installation. This is an option for those who prefer not to skimp on technical means. For those who prefer to apply their engineering skills in practice, you can use homemade options. True, they will not get rid of dust 100%, but this is a less expensive method, although more laborious.
Repair, repair, repair. How many new ideas he gives birth to. In general, the time has come to hang a shelf in an already clean room, where cement and plaster dust is highly undesirable. You need a vacuum cleaner attachment that will make the process of drilling holes in the wall a dust-free operation. I run for the laptop, quickly sketch the model, start printing on the SkyOne 3D printer, an hour later we are already using:
After the first shelf, I was almost satisfied with the nozzle. Why almost? Because it is inconvenient to hold with one hand and drill with the other. The nozzle should itself be fixed on the wall, for this you need to increase the area of \u200b\u200bthe “suction cup”. I calculated approximately what it should be: my vacuum cleaner, which I use for construction works, can create a vacuum of 16 kPa according to the passport, but this is at zero air flow, but we will only partially limit the flow by making a suction hole with a diameter of 20 mm. I think that with such a decrease, one can count on 6 kPa. Let's translate into more convenient kg/cm2 (1 Pa = 0.0000102 kg/cm2) and get 0.0612 kg/cm2. I think that the suction force of 2 kg will be enough to fix the nozzle well on the wall, but not tear off the wallpaper. As a result, it is necessary to provide a suction cup area of at least 32 cm2. Yes, the calculation is estimated, inaccurate, but then I will run the model through the flow calculation program, it is much faster than calculating manually.
Back to modeling. I tried to make the model so that it prints without supports.
I run it through the calculation, it is interesting to know the flow rate in the suction and rarefaction zone above and inside the nozzle.
The average flow speed in the drilling zone turned out to be about 70 km / h, I think this will be enough to capture dust from the drilling zone.
The average pressure above the nozzle turned out to be 101.1 kPa, under the nozzle - 95.4 kPa. The pressure difference is 5.7 kPa, lower than desired, given the area of 32.7 cm2, 1.9 kgf of suction is obtained. Considering the wear of the filter in the vacuum cleaner and air leaks on the sides, we will get 1-1.5 kgf, I hope this is enough.
