Diamond discs for the grinder: purpose, models, rules of use

Diamond blades for the grinder are highly efficient, strong and durable. On sale you can find various modifications that are used to solve various household and professional tasks.

A diamond disc is a circle made of a metal alloy, in the design of which diamond plates are installed on the edge. The following nozzle is used for work:

• for metal;
• by tile;
• on porcelain stoneware;
• for concrete;
• stone;
• on wood;
• for metal tiles;
• for cutting glass.

The scope of application of such attachments is very large, hence the demand for products that are manufactured in accordance with the task at hand. At the same time, they have the appropriate markings, by which it is possible to understand what exactly the circle is intended for. There are even models on sale that can cut glass. Glass cutting discs usually do not have a large diameter and coarse abrasive on the surface, which allows you to increase the accuracy and accuracy of cutting the material.

The plate is attached using laser welding or soldering. The latter method involves the use of silver or a special powder. After that, the disc is sharpened, and it is released for sale, ready for use.

Discs can differ in:

• type of edge;
• the composition of the binder;
• the amount of abrasive per square centimeter;
• indicators that diamonds have.

All diamond discs that are on the modern market for grinder attachments can be divided into two large groups:

• for cutting material;
• for grinding various surfaces.

Cut-off wheels also differ from each other primarily in the type of material relative to which they can be used. The determining factor when choosing attachments for angle grinders is their performance and service life. For example, the blades must cut material easily, providing high efficiency with minimal operator effort.

For cutting or grinding metal, discs are usually made of reinforced abrasive material.

Most of the modern models for natural stone processing are designed in accordance with the latest consumer requirements and the use of advanced technologies. For stone cutting, a diamond cutting disc is used. This rather expensive tool outperforms conventional abrasive discs - cutting is much cleaner and faster, and discs last much longer than abrasive discs. Ultimately, the diamond cutting disc is the best choice for working with stone. The diamond cutting disc should not be used to cut metal as it will be quickly destroyed.

Discs are available in the following sizes:

• 4 ½ "- 115 mm;
• 5 inches - 125 mm;
• 6 inches - 150 mm;
• 7 inches - 180 mm;
• 9 inches - 230 mm.

Small discs can be used at higher speeds, large discs only at minimum rpm, while there is a relationship between the diameter and the number of revolutions per minute. The larger the disc, the lower the number of revolutions it should work.For example, a 115 mm accessory can be fitted to a tool that can rotate up to 11,000 revolutions, while a 230 mm accessory only fits 6,000 revolutions.

Cutting discs can also be classified as:

• segment;
• whole;
• for reinforced concrete;
• turbo segment.

The first ones on the list are suitable for dry cutting of concrete. Their peculiarity is that the diamond edge is set in a segmented manner. Since during operation such a nozzle heats up faster and stronger, the slots allow the disc to cool faster.

In contrast, solid discs have no gaps, but holes are provided in the design to reduce stress. Coolant is supplied during operation.

The segmented design is present on discs used for reinforced concrete, however, more diamonds are applied to the teeth, since more strength is required. Such nozzles have a greater thickness, however, it will not be possible to cut material with a thickness of more than 100 mm in one go.

Turbo-segmented have a wavy surface, due to which rapid cooling occurs. They cost much more, but the price is compensated by great opportunities.

The thickness of such a nozzle is clearly spelled out in GOST 10110-87, where it is indicated that the thickness of the diamond layer can be from 5 to 10 mm. The height of the nozzle body is from 0.15 to 2.4 mm. The size of the landing diameter can vary from 12 to 76 mm. The outer diameter should have an indicator from 5 to 50 cm.

Depending on the hardness of the bonding material used, this type of disc can be soft or hard. The former are used for processing concrete, since, despite their small resource, they cut the material much faster. Solid can be used when cutting on asphalt, marble, clinker.

Grinding models are used for processing concrete surfaces. In their design, diamond powder is fixed to the surface by means of a special binder, which can be:

• organic;
• metal;
• ceramic.

The substance described is responsible for maintaining the diamond coating, which takes on the centrifugal force at the moment of rotation. Diffuse sintering is used to bond the body and the diamond layer.

Diamond blades for a grinder have their advantages:

• they can be used with almost any material;
• any task is performed faster, better, without additional efforts from the operator;
• if compared with abrasive wheels, then diamond wheels are safer, since no sparks arise at the time of operation;
• when working with such a nozzle, the noise level is much lower;
• precision is one of the main advantages of diamond discs, resulting in a high-quality cut.

Despite such a number of advantages, the attachments have their disadvantages. They cannot be used for processing metal, regardless of the alloy, however, as well as wood.

Diamond grinding bowls can be either 125 mm or 230 mm in diameter. In professional circles, they are also called "turtles". Such a disc for concrete processing is supplied on sale with a special coating, all models differ in shape and are designed to work in special conditions.

• Segments in one row. Such a disk is lightweight, but demonstrates great performance. Of the shortcomings, the complexity of the work can be noted, since in order to hold such a nozzle, it will take a lot of effort from the user.
• Segments arranged in two rows. It is used for roughing, as it quickly and effectively removes any irregularities not only from a concrete surface, but also from a stone one.With it, you will additionally need to use a fine finishing nozzle.

• Product of the "Square" type. Necessary for rough surface treatment, chipping effect can be observed, thanks to which the desired result can be quickly achieved. Such a nozzle wears out for a long time, after which a roughness is observed on the surface.
• Typhoon model. Essential for stripping off super-dense material. It is characterized by high strength and long service life. The shape was specially thought out in such a way that the spent particles are quickly removed to the side and do not interfere.

• Segmented Turbo. Has a solid diamond surface, thanks to which the grinding is carried out accurately. Such a disk is used when special care is required. Most often they are used to create marble and granite monuments, since you can easily process corners and create smooth lines.
• Boomerang nozzle. Fine finishing product with fine diamond inclusions. It treats the surface gently and is highly resistant during work.

When a user needs to purchase a universal diamond blade, there are many factors to consider.

• Manufacturing material. The segment disc is used for processing dry concrete, which becomes the root cause of the rapid wear of the packing. This is why experts advise buying nozzles with the maximum thickness if it is new concrete, and of moderate thickness if it is old.

• Special focus on cutting technologyto be used while working on concrete. Solid discs require a coolant supply, so the unit used must have such a function. Only the segmented product is used for dry cutting.

• Most users are trying to save moneybut not always worth it. If you plan to solve everyday problems with the help of the tool, then the disc can also be purchased at a reduced price, but with the appropriate quality, since it will not be required to solve problems of increased complexity. The main thing is not to use it without stopping and avoid overloading, then the product may well cut concrete or reinforced concrete with an average degree of reinforcement. Professional circles are a completely different category that cannot be skimped on. Their inflated cost is due to their reliability and durability.
• The last thing the user needs to consider is the depth of cut., since the larger it is, the larger the diameter of the nozzle should be. In this case, most people forget about the capabilities of the tool used, since it should not make a large number of revolutions, leading to premature wear of the nozzle. On the contrary, if a disc of a small diameter is put on a grinder with a minimum number of revolutions, then it will quickly heat up.

There are a few key points to keep in mind when using angle grinders, especially if a diamond tip is used.

• Before installing the cutting disc, you will need to inspect it for integrity, since it is forbidden to use circles with a defect. This also applies to the expiration date, which few amateurs know about.
• The sharpening of the tool should be carried out exclusively with a specially designed nozzle and no other disc, since its edge is not designed for such a load and will simply fly apart during operation.
• It is impossible to put on the tool a cutting or grinding disc of the wrong diameter, as well as to use them for other purposes or in the processing of unsuitable material. Installing a nozzle with a larger diameter will require removing the protective cover, and this is strictly prohibited for safety reasons.

How to choose a diamond blade for a grinder, see the next video.