The angle grinder has become attached to the souls of professionals and amateur repairers due to its ease of use. It can be used to cut and grind materials of different strength, including concrete, artificial and natural stone. And if you are thinking about purchasing a grinder, then you need to know what criteria to choose this tool for it to help you effectively solve your problems.
Grinder design
The grinder has a fairly simple and technologically advanced design:
- the case is made of reinforced polymers, on which the power button with a lock is located;
- an electric motor powered by a battery. On grinders, drives are usually used that provide high shaft speeds, and a fan is present for the proper level of cooling of the elements;
- a spindle that consists of a threaded shaft, a washer, and a nut for attaching a disc and other accessories;
- removable handle;
- single-stage angle reducer made of aluminum or magnesium alloys;
- a protective cover that covers part of the disc, preventing sparks from flying in different directions.
How the grinder works
In order for the grinder to start working, you just need to turn on a button or switch on the case (this depends on the specific model). But the power of such a construction tool can be carried out both from the mains and from the built-in removable battery, as in the Greenworks G24AG angle grinder.
The Grinder is equipped with a high-resistance collector motor. This significantly reduces the operating currents. Next, the motor shaft is unwound, driving the gear drive in the gearbox. It rotates the driven gear itself, transmitting the voltage directly to the spindle. On expensive models, sometimes a release coupling is also installed, which is installed between the gearbox and the engine. The clutch allows you to prevent a reverse impact in the event of an unexpected stop of the disc, if it suddenly jams.
According to what criteria and characteristics to choose a grinder
It is unlikely that the convenience of the handle or the low weight of the construction tool itself will be a sufficient reason for the purchase. The main characteristics to consider when choosing a grinder are power, rotation speed, and disc diameter.
Power output
Depending on the model, the power of the grinder starts from 650 W and goes up to 2700 W. It largely depends on the diameter of the disk itself. Also, the diameter of the disc determines how powerful the grinder drive is.
Snap-in diameter
When choosing a grinder, pay attention to the diameter of the circle: it depends on what the depth of the cut will be. For example, models with a disc diameter of 125 mm can safely take a depth of 30 mm to 35 mm. If you need to cut deeper materials, choose a grinder with a disc diameter of at least 230 mm. For small work around the house, the Greenworks G24AG cordless angle grinder with a disc diameter of the same size is quite suitable for you. It contains lithium-ion batteries, which have managed to prove themselves well in the construction market. It is especially convenient that such a grinder can be operated almost in the field, where there is no access to electricity.
Advantages of battery-powered grinders
We have already talked about portability and the ability to work without connecting to the power grid. In addition to cutting off metal parts and various structures with the help of a battery-powered grinder, you can remove paint, dirt, and rust from various parts and structures. This tool is useful when laying electrics, installing plumbing and other construction work.
Battery-powered grinders are more convenient to use than their network counterparts, due to their light weight, for example, the weight of the Greenworks G24AG grinder does not exceed 2 kg. The engine cooling system protects them from the possibility of overheating. The small power of such a construction tool will allow it not to jump right out of your hands, and the low noise level, which varies from 35 to 65 dB, will provide a mode of operation without harm to your hearing. For comparison, the volume level of a conventional network grinder connected to a 220 V network ranges from 81 to 101 dB. This is about 3 times more than its battery-powered counterpart and corresponds to the noise level that an airplane makes when flying over the plain.
Surely you also have this useful tool. We are interested in which grinder you use: the one that runs on the mains, or the battery? Do you have enough of its functionality in terms of performance characteristics?
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