Angle grinder:, purpose, characteristics and the choice of the technical characteristics of the most popular models

Angle grinder, it is the common people, "Bulgarian", is known for everybody who has ever faced with construction and mechanical works. This power tool is indispensable in the cutting and polishing of virtually all of the radical used in building materials. But today's market is so saturated with this type of product, which at times to understand the choice is not so simple. Next I will try to help you with this.

Photo angle grinder

On the "grinder"

Incidentally, the term "Bulgarian" he appeared in the former Soviet Union due to the fact that the first angle grinders in the Soviet Union came from Bulgaria.

For those who still managed to still not faced with such a well-known tool, with a few lines of his appointment:

appointment

• Grinding
  That directly indicated in the title of the tool. the rotational speed of the Bulgarians working part is very high, it varies in the range of 10,000 revolutions per minute. So it turns out to cope with even the most major defects in the different types of surfaces;

Grinding the concrete surface using angle grinders with their hands

• polish. Install special soft polishing circle, and terrifying machine, "devouring" the stones turns into the machine takes care of your car;

Polishing "grinder" car

• trimming. We put a special nozzle in the form of metal brushes and remove any rust from metal or old paint from the concrete wall;

After using this tool even traces of paint will not remain

• cutting. Well, it is generally the most common method of operation of angle grinder. Metal, concrete, brick, plastic, glass, stone and even wood fall under the onslaught of "grinders". Only the main thing is the correct disk set for each material has its own consumables;

Cutting of the profile of the steel pipe using LBM

• Shtrobirovanie. In fact, this is a special type of concrete cutting, but it's worth a special mention, since it is very often used by electricians for installation of electrical wiring in a private home or apartment.

Creating Grooves in the concrete wall with the "Bulgarian"

This is not the full range of all the possibilities of the power, but it is already enough to feel the respect for the "grinder".

Device

All angle grinders have the same structure:

Scheme "grinder" device

1. First, if you count from the power feed point, there is a button, NO and NC contacts;

EXAMPLE trigger button

1. The next element of the most expensive and complex from the technical point of view. it engineConsisting of a rotor located inside the stator. It works on the principle of "thumb", that is, starts to rotate when power is applied to the two component parts. It was his size determines the power of "grinders";

The armature and the stator for a corner sander

1. Geared steam forming a reducer. Wherein one of the gears is put on the rotor shaft and the other on the shaft, facing outwardly. By the way, they come into contact at a right angle from the instrument and took the title the word "corner";

Two gears for "grinders" gear

1. And, finally, all converted from electrical to kinetic energy falls on shaft, Which is set and the disc.

Shaft for angle grinders

select the Features

How to choose the LBM for personal use?

Here it is necessary to take into account many different nuances:

1. The diameter of the circle directly determines the thickness of the product which is "bolgarka" can be cut in a single pass, and the size and weight of the tool itself. The fact that a large drive up to speed will only be able to promote a strong, that is, dimensional and heavy engine.

There are also the following embodiments:

• Diameter 115 mm - small apparatus for one-handed, which is convenient to get to the most remote places. But maybe he is very limited;

The smallest class angle sanders

• Diameter 125 mm is most common in everyday life. Such an apparatus is not much greater than in the above-described dimensions, but it has several large working surface and power, which is enough for most everyday issues associated with harsh and grinding. Also, they are characterized by low cost, which also welcomed handyman;

Grinding, cutting, cleaning, as well as small size and affordable price - all you need for a home

• Diameter of 150 mm is rare, since such "grinders" are already more expensive and weigh more above described, but this powerful "monsters" may not hold out. Therefore, this class is usually chosen for some specific activities where you need is a combination of functionality and size;

Transition class angle grinders

• disc diameter 180 mm, or rather uses his instrument very well suited for those who need cut many large pieces, but not easy to handle bulky grinder with a maximum range size;

Angle grinders with a circle with a diameter of 180 mm is not overtaxed hands

• Diameter of 230 mm can be used only real "monsters" angle grinders. These grinders have a huge size and weight to match the located inside the engine. Home buying such units rarely due to high prices and just the lack of the amount of work for which they are designed. But at work or a large construction site they belong;

Nothing resist "grinder" with a circle 230 mm in diameter

1. Power. This option comes from the diameter of the wheel unit, as we have seen. So that it make much sense to stop there. Except that, if preferred, of course, is to give a more powerful choice between "Bulgarians" of the same class will stand in front of you. The extra forces will not be denied;

I recommend before shopping in hands tested in the angle grinder the size that you want to buy, and get used to its weight. And if you will come across examples of much lighter, abandon them, for sure, they are lightweight rotors, which negatively affects cardinality indicator tool.

1. disk rotation speed - a very important parameter for your life. The fact that, for example, small angle grinders perform up to 11,000 revolutions per minute, while large - only to 6600 revolutions per minute. And if you suddenly put a big drive on the device, which are smaller circles, he smashed, smashing everything around and causing terrible injuries sometimes incompatible with life. In no case do not do it!

Shard have scattered disc

What should we look for when buying on this item? The presence speed controller, which significantly extends the functionality of the tool. It is not at all the work you need the full power of the angle grinder;

Here is the power regulator, if disassemble the unit

1. The presence of smooth start. It concerns only large "Bulgarians" capacity of two kilowatts, although there are models with a circle with a diameter of 180 mm, and is equipped with a data device. What is he doing?

Following:

• It reduces the load on the power grid, eliminating the strong differences of electricity;
• Runs LBM without breakthrough, which is very noticeable when such power;
• Reduces the wear of the tool components;

Here is the dull box and is responsible for the smooth start-up of powerful angle grinders

1. Form the main handle. And this is concerned, on the contrary, very little "Bulgarians".

There are two possibilities, and you need to decide which one you preferred:

• The rear edge is rounded, and the handle is used as the tool body. Power key at the same time is located near the gear. Due to this "focus" LBM becomes shorter and thus more compact;

Corpus knobs and buttons in the gearbox

• There is the usual pull back the handle to the standard button;

The usual long handle with a button

1. power cord shell. Buy tool with rubberized soft-touch cable, this will be fine in any weather. Wire as a solid shiny insulation break in the cold;
2. The principle of operation of the trigger mechanism. Certainly, many have pointed out that in addition to the primary key on the handle side there is another small button.

So it can have different functions:

• Fixing the position. That is, if you run the angle grinder and squeezed it, the main button will remain in the ON position, even if you remove the arm. This is especially useful when from the "Bulgarian" is a stationary machine or necessary in the course of work often enough for me;
• Allow start command. In this case, angle grinders will not start until you zazhmote both keys. Such an embodiment eliminates the accidental activation of the unit, increases the safety of its operation.

Scheme trigger angle grinders

1. Availability of service centers. The information you must provide full instructions supplied with the instrument. Note that the "Bulgarian", which does not have service in your area, after the first failure will go to the dump;
2. Securing protection. The protective cover can be fixed either clamp or plate. In any case, remember that only the reliability of fixing it will save you from flying debris disk.

A few words about the maintenance

If your angle grinding machine broke down, it is strongly recommended to carry it to a service workshop and do not try to fix yourself. In most cases this leads only to an increase in the cost of repairs.

But a couple of operations prodelyvat still possible and even necessary, if you want to delay the campaign to the master:

1. Periodically, do not be lazy to unscrew the four bolts that hold the gear cover, and remove it add grease. So gear last longer;

The addition of lubricant in the gearbox to increase the duration of "life" of a gear pair

1. If the tool no longer included, unscrew the cover on the sides of the body, covering the brush. Take them out and examine. They are in the process deleted and can no longer get to the anchor collector. In this case put a new set of.

Here is the replacement of brushes

current offers

As I wrote above, on the shelves of specialty stores, angle grinders are presented in a huge range.

And some of them, I will present to you here:

• «MAKITA 9555 HN" model:

«MAKITA 9555 HN" model sample

• "The caliber of the LNA-125" model:

Sample Model "Caliber LNA-125"

• «Rebir LSM-125" model:

Sample model «Rebir LSM-125"

• "Interskol LBM-125" model:

The sample model "Interskol LBM-125"

• «Makita 9069" model:

«Makita 9069" model sample

• «AEG WS 2200" model:

Sample «AEG WS 2200" model

• «BOSCH GWS 20-230 H Professional» Model:

Sample model «BOSCH GWS 20-230 H Professional»

• "Interskol LBM-115" model:

The sample model "Interskol LBM-115"

• Model "Zubr ZUSHM-180-1800P":

The sample model "Zubr ZUSHM-180-1800P"

• «Makita 9566 CV» Model:

Sample model «Makita 9566 CV»

conclusion

You are familiar with what is an angle grinder. We learn the intricacies of choosing the most suitable model for their needs and examined the technical characteristics of the most relevant samples. I will be glad to answer your questions in the comments.

"Bulgarka" during metal machining

Videos in this article contains a number of additional information. Yet questions have arisen on the subject can ask in the comments.