How to choose a grinder?

Angle grinder is a special tool designed to work with different materials. It can be used to cut, grind and polish the metal surface, stone, wood, etc. It is used at home, at work and in the construction, as it has a very broad scope. Manufacturers now offer angle grinders with different performance characteristics and a wide range of functions. In this article we will look at his instrument device types and the main technical parameters, which is necessary to look, so you know how to choose a grinder, to make it safe and practical working tool for construction and repair.

Design Features angle grinders

The classic grinder design includes such elements:

• The housing;
• The spindle;
• Reducer;
• The electric motor;
• Additional handle;
• The protective cover.

Also included for angle grinders always includes key for replacing equipment, and user manual. Some models may have included a variety of tooling, spare carbon brushes, or the case.

Household and professional grinders

Grinders, depending on the purpose and ability to cope with different load capacity can be divided into household and professional use.

• Home — these models are irregular and not a long job (an average of about 30-40 minutes per day), this grinder is not able to withstand high loads. When working with such an instrument would have to take a break periodically to the engine is cold and there was no congestion.
• Professional — these models are much more powerful, can withstand continuous operation over an entire work shift. Also worth noting is their resistance to high loads and excellent performance.

For Home LBM suitable home with a circle with a diameter from 125 mm to 150 mm, it will be enough to solve almost any problems that may arise. For the professional it is not necessary to overpay. If you need a powerful tool for active use, it is best to consider the high-power professional model with a circle of 180 mm and above.

Grinding machine with different types of handles

When choosing a grinder should look at the comfort of work with the tool, the number of arms they are:

• One-Handed — They are designed to work with small circles with a diameter of 115 mm and 125 mm. There have to keep for housing and additional handle, even though there are, but it is used rarely, only when performing complex work.
• Two-Handed — these models are more convenient to work, can be a community of any size. And thanks to the fact that the tool is held with two hands, increasing safety. Master can better control the sander.

It should also be said about a special anti-vibration handle. It usually has expensive professional-grade tools. It allows you to significantly reduce the level of vibration transmitted to the operator's hands. With such grinding machines work more convenient, significantly increases the accuracy and quality of work.

Power, speed and diameter of the snap

The main characteristics of which depend on the work grinders are: the diameter of the disk capacity and the maximum number of engine revolutions. All of which are closely related to each other.

For example, it is impossible to find the angle grinders with high turnover, more than 10,000, working with a circle diameter of 230 mm or more. Therefore, when choosing carefully look at both of these options to match your goals.

Motor Power also has a relationship with the diameter of the disc. Obviously, the larger the drive, the more powerful the engine is required to handle the load. For an instrument designed for 125 mm circle, optimally suitable motor 750 W, and to operate with a circle 230 mm in diameter it is recommended to have a more powerful unit-not less than 2200 W

.

Additional features

In order to increase comfort and safety while working with grinder manufacturers equip their tools with various additional functions. Including:

• Support the engine speed — This feature allows you to maintain a constant speed during operation of the motor, regardless of the degree of stress. This is due to the constant drag compensation electronic circuit.
• Inrush current limiting system — may still be called soft start, avoiding sharp pin grinders at startup which occurs because the maximum engine load at startup. The availability of this function not only prolongs the service life of the motor, but also increases operational safety, as well as contribute to a more precise work.
• Adjust the speed — extend the use of grinders, as the master can customize the tool to perform cutting, stripping, polishing and other work.
• Block rec losing — an important option, which guarantees the safety of the master. This system just will not give grinders spontaneously engage with re-energizing the motor.
• Automatic balancing disk — protects the spindle from the blows. The presence of this function reduces gear wear and increase the life of the device. Most often, this option is available only in powerful professional grinder.
• Anti-kickback — to avoid jamming the disc in the material, it is obligatory for professional tools.
• Dust protection — a very useful option if you often have to work with stone or concrete. The dust, which in large quantities occurs during cutting, may damage the engine, reducing the term of its operation. Availability of protection will avoid many problems and to provide a long service life of the tool.
• Motor overload protection — This feature also contributes to the durability of the grinders, but does not affect its performance and security. The system only provides automatic disconnection device at peak load, protecting the motor from overload.

Features battery grinders 

This type of angle grinders is a standalone tool that does not require ongoing access to the electricity network. Cordless models grinders are rarely used in everyday life, while their work is quite limited and constantly have to monitor the battery charge and time to change it, or wait for it to be recharged. But this is an excellent choice for repair or construction work, when you have to do something urgently, in the absence of power supply. Typically, these devices are characterized by high power and good performance.

If you want to buy a battery grinder, make sure you look at the capacity of the battery. What it will be higher the longer the tool will be able to work continuously. In addition, it is better to take care of the purchase of a spare power supply, so the work will not be unnecessary interruptions. While one battery is working, and the second will be charged.

How to choose the right tooling for the grinders?

It is important to remember one very important rule: Do not use discs a larger diameter than the one on which this tool has been designed.

Since the scope of the angle grinder is very extensive, but also different accessories can be used for it. Depending on the destination the drives are:

Cutting

Used to cut a variety of materials. In turn, they, too, are divided into 2 types:

Abrasives — used for cutting work, thus it is necessary to look at their label, on which the appointment of a specific range depends where:

• is the first letter of the circle grain material ("A"-alumina, "AS"-fused, "C"-silicon carbide) for example, A 24 S.
• figures show graininess circle-grits are used for hard metals, fine-for soft.
• at the end of the letter-said about the hardness range fraction ligament, the closer it is to the end of the alphabet, the ligament is stronger and less wear and tear.

Diamond — this type has a more narrow specialization and is divided into 4 types, depending on the material with which they work:

• "Asphalt"-is designed to work with the materials, which include many abrasive elements.
• "Concrete"-is designed for cutting all types of concrete.
• "Building material"-is used for cutting ceramic or silicate materials.
• "Granite"-suitable for use with very hard and durable materials, such as granite.

Grinding wheels

They also come in several types, depending on the purpose: to the end of work, for both internal and burnishing operations. They can also be abrasive or diamond. Mainly used 4 basic types of grinding wheels:

• Belleville.
• Cupules.
• Flap end.
• Abrasive mop.

Debarring Brushes

This is a special kind of equipment for an angle grinder, which is typically used for removing rust from metal surfaces. The working part they have a special wire brush, which is made of brass or metal wire. Brushes can be cup-shaped and disc. When selecting necessary to look at the parameters such as diameter, bore size, material, thickness and length of the pile, as well as brush stiffness.

Online Store 130.com.ua offers a range of grinders. You can buy grinders in Kiev, Odessa and Kharkov, as well as other power tools at an attractive price with delivery in Ukraine.

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