Diamond blades are designed to cut a wide variety of materials, mounted or installed on specialty cutters and grinders. Its name is due to the fact that they contain diamond particles, which being a material of high hardness and abrasion, allows them to cut in materials of considerable hardness, with great precision and speed.
Composition of a diamond blade
The discs consist of a circular steel base, the edge of which contains diamond segments. The edge of the disc can be segmented, continuous or turbo (also known as serrated). On the other hand, the steel base of the disc can be provided with spaces between segments, which allows them to be cooled by the circulation of water or air.
The composition of the diamond segments consists of a mixture of metallic powders and diamonds. These diamonds can be natural or synthetic, and vary in grain size, quality, and shape.
Manufacture of a diamond blade
To obtain a diamond disc, its manufacture involves the union of the steel core and the diamond segments. This union can be carried out by means of two methods:
- Brazing: this technique makes the union of the segments and the nucleus through a silver solder. This method is used with standard water cutting discs.
- Laser welding: the union of the steel base and the segments is made with the use of a laser beam. This weld represents the most advanced, solid and safe joint, and can be used for dry and water cutting.
After the assembly process of the diamond disc, each segment of it is subjected to double bending tests, to verify that they are perfectly joined to the base. Tension is also applied to the blade to ensure that it cuts straight and accurate, even under difficult conditions. The blades are tensioned manually by skilled personnel, and they are also sharpened to ensure they cut easily.
Uses of a diamond blade
A diamond blade can be mounted on a tile cutter, concrete cutter, or grinder. They can make cuts in concrete, tile, tiles, brick, stone, block, marbles, granites, single and double-fired ceramics, glazed ceramics, tiles, among others.
Generally, discs They are used by professionals in blacksmithing, masonry, marble workers, tinsmiths, construction workers in general, etc.
How a diamond blade works
The diamond blades they don’t cut like a knife, they polish. The diamond crystals located on the edge and segments of the disc, polish the material, by means of their exposed faces. Each exposed diamond has a tail or extension that holds it attached to the base of the abrasive disc, while executing its function.
As the disc rotates on the shaft of the cutting or grinding machine, the user must push the disc into the material. The disk starts cutting the material, and the material starts the disc wear diamond, as it progresses.
Diamonds break into smaller pieces as they cut. The materials of high hardness and density, fracture diamonds faster and wear the metal base of the disc, which allows new layers of diamonds to be exposed to continue making the cut.
Classification of diamond blades
According to their general characteristics, diamond blades They can be classified by type of edge, diameter and cut.
The edge of a diamond disc it can be continuous, segmented or turbo. Depending on the type of edge, the finish and cutting speed may vary. Although all the discs can cut all the materials that we will mention below, it is recommended to use them according to what is indicated:
They exist in the market, diamond blades of different diameters, among the most common we have 4 ″, 4 ½ “, 7 ″, 9 ″, 10 ″ and 14 ″. The diameter of the disk provides a different depth of cut, the larger the diameter the greater the depth. Of course, the diameter also depends on the machine where the disk will be mounted.
On the other hand, depending on the diameter of the diamond disc, it has a maximum utility speed (RPM). And discs with smaller diameters should be used with a higher spin speed than discs with larger diameters.
The types of cut of the diamond blades are two:
- Wet cutting: in this case, water is used to lubricate and keep the disc temperature stabilized during use. This helps extend both the duty cycle and the life of the disc. Wet cuts are the most recommended.
- Dry cutting: this type of disc does not need lubrication or be cooled with water. Therefore, the disk must be allowed to cool for at least 10 seconds, for each minute of work. It is recommended to use dry cutting, when it is dangerous to use water. For example, in work areas near electrical installations or when water damages the work material.
It is very important to know the operation of the discs, as well as its design to be able to select the most suitable one, when making a cut.