Low-speed drill: choosing a powerful power drill for drilling a bar

Choosing a low-speed drill for drilling a bar

The power plant (in other words, the motor) of the drill with which the tree is drilled must be powerful enough. This allows you to work by creating holes of large diameter and noticeable depth. This is an objective fact: it is very difficult to explain correctly why a high-speed drill is not suitable for the same job. This would require a brief summary of a whole section of physics here.

Another thing is more important: in order to pierce a pine board or panel with a twist drill with a diameter of 2.5 cm, it must be inserted into a 0.8 kW drill. Preference should be given to a tool capable of operating at multiple speeds. For a full-fledged construction of a house from scratch, a 1.3 kW drill is suitable. Experts recommend choosing a model with a three-stage gearbox. When it is planned to work in winter, it is advisable to use a drill with the thickest cord possible - it is the most reliable.

Information on the period of continuous work will help to determine whether a particular tool belongs to the professional class or not. Experienced builders need the drill to run continuously for at least 1 hour. In addition, unlike the household segment, such equipment performs only a narrow range of tasks.

In the next video, you will find an overview of the Rebir IE-1305A-16 / 1700R low-speed drill mixer with reverse.

Tool features

Obviously, the main feature of such a tool is a solid power reserve, thanks to which the operator will be able to make large holes in a solid material. But, as such, an increase in power without improving other parameters does not really matter. So, modern powerful electric drills are characterized by the presence of a special function of impact action, which, together with a power load, just allows you to solve complex problems of machining. Structurally, such models are distinguished by a specific configuration of the location of the chuck with a gearbox through a rotating shaft. The gears of the mechanism do not move simultaneously, which ensures the forward movement of the chuck. In other words, a powerful impact drill, in addition to direct drilling, provides a vibration effect, which allows intensive destruction of the work material.

For a powerful tool, the characteristic of endurance is also important. The device supports the workflow under high load for 40-50 minutes without stopping. In order for the structure to in principle be able to withstand such loads at maximum speed, engineers use high-strength metal alloys. While powerful percussion models are believed to be pro-grade only, this is not the case. There are many exceptions, in which manufacturers strive to combine high power at the level of professional technology and ergonomics inherent in the household class.

How Do I Pick a Good Drill?

It should be based on the tasks that will face the tool. High power can be required for a variety of purposes, from making holes for fixing fixtures in the ceiling to creating large-format niches in concrete foundation blocks. In addition to the basic indicators of power and torque, the features of the technical device and design are taken into account. For example, a powerful low speed pile drill should have a reinforced drill holder and mains power. While being part of the battery-powered construction site segment is often a key selection factor, mission-critical solid-state power operations are desirable with the high energy support that only corded tools provide today.

If the power requirements are not so high, then the emphasis in the choice can be shifted to functionality.The same 18-volt cordless version will provide ample power, and a range of high-tech options will make the tool work more accurately and accurately. At the very least, you should turn to powerful drills with a multi-speed type gearbox. This will make it possible, with individual drilling settings, to perform tasks of varying degrees of complexity. Further, the presence of such functions as soft start, maintaining a constant (maximum) speed, reverse motion (reverse rotation), indication of brush wear, LED backlight, etc. is taken into account.

The presence of security systems should not be ignored either. It is advisable that the electric drill is provided with a spindle lock, which will insure against accidental start-up. Also, the latest models, almost without exception, are equipped with systems to prevent overheating and overloads. For this, an electronics unit is being introduced that monitors the readings of the temperature sensor on the motor winding. When critical values are fixed, the device automatically stops working.

How to choose a low speed drill

First of all, you should pay attention to how serious work is planned. Lightweight mechanisms, with a capacity of 0.7 to 1 kW, have everything you need to carry out minor finishing work

But if major repairs are planned, especially construction from scratch, drills with a capacity of up to 1.5 kW will be required. A mixer drill stands out in a special group. It is capable of simultaneously drilling and mixing solutions. A drill mixer is not just a powerful drilling machine. It must have a modern microelectronic system. Depends on this system:

comfort at work;
safety of workers;
flexibility of adjustment for a specific task;
tool life.

In addition to the drilling machine itself, attention must also be paid to the selection of nozzles. Almost all drills sold now have standardized thread spindles

Most of the leading manufacturers have appreciated its merits and do not try to invent their fastening methods from scratch.

No. 9. What else to consider when choosing a drill?

When going to the store to buy a drill, do not forget to pay attention to the following points:

ergonomics. The drill should have a design that is comfortable for you, hold well in your hand, not cause discomfort, otherwise it will be impossible to do the job with its help, and even quite accurately it will be impossible. The tool handle may differ in diameter - here it is more convenient for someone. Non-slip and grooved pads will increase safety and comfort during work, as they practically eliminate the possibility of accidental slipping of the drill from your hands. You can also try pushing buttons to make sure the drill is comfortable;
the function of fixing the "start" button allows you to reduce the stress on the hand, since there will be no need to constantly hold the button down during operation;
reverse allows you to change the direction of rotation of the drill by pressing a button. Necessary when the drill is used as a screwdriver or when the drill gets stuck in the material. Almost all modern models have a similar function;
anti-lock clutch is available in many models and protects the tool from burnout when it jams or collides with the reinforcement, and also protects the user from kickback when the drill stops like this;
drilling depth stop - an element on the drill body that allows you to make holes of a precisely required depth. It is convenient when the wall is thin and when drilling it is necessary to make a non-continuous hole;
The motor brake allows the drill to stop quickly at the push of a button. After stopping work, the drill can still rotate for about 10 seconds, and sometimes more, while the drill must be kept suspended. The forced brake function makes the job a little easier, but not so necessary;
an anti-vibration system is, as a rule, only in expensive professional models, which can significantly reduce the vibration of the tool during operation;
additional handle can be attached to the body, be removable or rotatable, makes it easier to drill dense materials due to the additional stop;
a spotlight lamp allows you to highlight hard-to-reach places, is built into the drill body;
the dust collector collects part of the dust that forms when working with concrete and stone;
equipment. Some manufacturers sell a spare chuck, a metal drill depth gauge, as well as bits and some other elements along with the drill. If you really need all this, then it is better to take a drill with an extensive set - it will come out cheaper;
specific drill bits are purchased separately. There are stops, mini-drills, circular cutters, attachments for grinding and polishing, screwdriving, mixer attachments and even attachments for a bird pick;
the name of the manufacturer is a guarantee that for your money you will get a really high-quality and durable tool. The topic of drill manufacturers deserves separate consideration, but note that the leaders in this regard are Metabo, DWT, DeWalt, AEG, HILTI, Black & Decker, Bosch, STERN, Makita, Hitachi, Skill, Sparky, Interskol, Einhell, Zenith.

Only a clear definition of the purposes of use and an understanding that a good thing cannot be cheap will allow you to choose a really high-quality drill.

Drilling a hole for a dowel in the crowns of a log house

For drilling a hole for a dowel in my bath, drills with a diameter of 30 mm are provided. But, Nagel is a square oak. The drilling turned out to be much more difficult than I imagined. Therefore, I will share some experience of using a large-caliber drill. As always, I began my preparation by studying articles on the Internet and horror gripped me when I read the following on the construction forum ... I will give quotes without changes (do not consider it plagiarism). Several questions and answers:

Question: "How to make sure that the tow is not wound on the drill for the dowel?"

Answer: “And I would lay the tow, but when drilling, I would burn the tow with a rod heated over the fire. In my opinion, it is more technologically advanced. "
Answer: I did it with the following sequence: I put the bar, drilled the holes, put a mark on the side of the bar where the hole was, disassembled, put the tow, assembled, found the holes with the crank, hammered the dowel. At first glance, it is laborious, but it is more difficult to pull out the drill with the wound tow;
Answer: I put moss between the crowns. It doesn't wrap, but there is another problem. I drill with a 24 mm twist drill

In practice, I drilled two logs through and through at once. Half of the holes were made by an automated line. When drilling holes with modern large diameter drills with a wrench at the end, the most difficult task is to prevent the drill from going deep into the log. The collar pulls it down so that you don't need to press! The strength with which I held the drill in my hands was not enough to prevent the drill from pulling me into the hole. I am not talking about the force of the turn, but the force with which the drill itself digs into the tree! I barely pulled the drill with shavings. Worst of all, when the drill did jump out of the hole, I could tip over from a height. To prevent this from happening, I deliberately blunt the sharp edges on the drill bit so that it would not pull the drill with such force into the hole for the dowel. And it became easy to pull out the drill. An important feature of working with large diameter drills is that it is necessary to constantly pull it out of the hole for the dowel and remove the chips. The drill can jam when plunging deep into the crown of the log house. This is time-consuming, especially when working at height!

Construction (architectural) section of a wall with a wiring diagram for installing dowels, sequential numbering of log parts

What kind of drills and drills to drill a hole for a dowel?

Slow-speed drills - old-style drills without a breakout mechanism - the torque is so high that it can turn the driller. It is better to use a drill with two handles - it is easier to hold it in two hands and it is more convenient to pull it out of the bar.

Unfortunately, I drilled holes with an ordinary drill with one side handle. Difficult, but there was no other. Experience comes with time. and as it turned out. you can make drilling easier by changing the shape of the drill itself.

Use beam drills with a centering drill (blunted as described in the first part of the article) if you do not want to spend all your efforts on pulling the drill out of the grip of the bar. Personally, it helped me a lot when drilling a spruce bar (soft wood)

The holes for the dowel are drilled vertically so that the crowns can settle on them.

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Choosing the right drill

Some drills will even drill through the rebar. If you need to drill a hole in a reinforced concrete surface, do not stint and buy a special drill designed for drilling concrete even through a metal mesh and reinforcement rods.

For about $ 50, you can buy an impact drill that can drill shallow holes in most types of masonry, but spending a little more on a hammer drill gives you two benefits in return: the ability to drill deep holes and, just as important, a higher drilling speed. which is especially important when you have to drill many holes at once. Drill impact power is measured by BPM (beats per minute)

But this is far from the only important indicator of the performance of a hammer drill: the amperage of its motor and how comfortable this tool is in your hands are much more important. Solid metal chucks are more durable than plastic chucks. Quick-release chucks are undoubtedly more convenient for everyday work, but they are not suitable for drilling masonry, as they lack the strength to hold the drill.

Drill power is measured by BPM (beats per minute). But this is far from the only important indicator of the performance of a hammer drill: the amperage of its motor and how comfortable this tool is in your hands are much more important. Solid metal chucks are more durable than plastic chucks. Quick-release chucks are undoubtedly more convenient for everyday work, but they are not suitable for drilling masonry, since they lack the strength to hold the drill.

Varieties of powerful drills

It's worth starting with the fundamental difference between mains and battery models. Traditional corded drills are characterized by high power and low weight, which improves ergonomics when working with them. But tethering to an outlet limits their scope. Actually, this is the main advantage of models with batteries - they are autonomous and can be used at a distance from power supply sources. On the other hand, even powerful cordless drills are equipped with gearboxes with a small gear ratio, which also leads to a limited number of supported speeds (2-3). The disadvantages of battery modifications include the enlargement of dimensions due to the integrated unit with a battery. At the very least, it adds weight, but, as already mentioned, it is in relation to a powerful tool that balanced mass is a plus.

Also, drills differ in design. Manufacturers produce models with angled, straight and pistol-shaped bodies. The choice of this or that design is determined by the operating conditions of the instrument, but the classic apparatus in the form of a pistol is considered universal. A separate category is a powerful two-speed drill designed for mixing liquid and bulk building materials.These models have a reinforced gearbox and increased speed. Two speeds make it possible to stir both viscous and flowable solutions with optimal torque

But most importantly, the handle design is specifically geared towards vertical support perpendicular to the floor. The operator holds the drill mixer by two handles, directing the specially shaped nozzle downward

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There are many types of electric drills on the market today

Drills differ from each other primarily in the design of the gearbox and purpose.

The main types of tool data are:

Conventional drills. They are distinguished by their compactness and lightness. These devices can be used for drilling materials such as wood, metal or plastic. Typically, conventional drills have RPM and receiver settings.
Impact drills. Their distinctive feature is the presence of a modified gearbox with two additional gears. Due to the rotation of the engine, not only the transfer of revolutions to the chuck takes place. The device can carry out reciprocating movements. This creates a chisel effect.
Mixing drills. Such devices are distinguished by an enlarged gearbox. Despite the significant strength of these devices, they have very low rotation speeds. This is facilitated, among other things, by the mass of such drills. They are mainly intended for mixing mortars.
Drill screw type. They can be used not only for drilling, but also for tightening or unscrewing screws. The main feature of such devices is a significant range of rotational speed settings.

Expert opinion
Vasily Kuznetsov

All of the above drills are in demand. They differ among themselves not only in technical characteristics, but also in operational capabilities.