Terms of use
It is necessary to use diamond drills, taking into account the specific features of the tool and the material being processed. Electroplated diamond spraying forms drills that can be used at the highest RPM, so they are as productive as possible. There are a number of rules to consider:
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the larger the drill size, the fewer revolutions possible;
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the pressure is carried out with different forces, glass does not require much labor, concrete does.
If you break these rules, then the drill will fail very soon. Therefore, before buying a set of tools, decide what material you plan to process. Industrial and household drills are completely different in terms of the number of possible applications. For comparison, an industrial drill for porcelain stoneware can be used about 120 times, a household drill about 70 times.
The following video talks about diamond drills.
Nuances when using
When working with this category of tools, there are the same rules as when using the classic options:
- The larger the hole diameter, the lower the number of revolutions. So, a hole with a diameter of 1 millimeter is drilled at a speed of 6000 rpm, and, accordingly, 50 and more millimeters - at 100 rpm.
- A certain amount of pressure. For concrete surfaces it is more, for glass it is much less.
If these rules are not followed, a diamond-coated drill will quickly lose its useful qualities.
When purchasing a tool, you need to imagine what types of work and on what scale will be performed. And it's not only about the cost, but also about the resource laid down by the manufacturer.
Simply put, there is a twofold difference between household and industrial designs of the same category. For example, a drill for porcelain stoneware can be used up to 70 times for domestic purposes, and up to 120 times for industrial purposes.
There is one more important parameter - the maximum drilling depth in one pass, after which the product is unusable for further use. This characteristic for the material mentioned in this paragraph is from 10 to 14 meters, depending on the diameter of the tool. It will not be difficult to convert one indicator to another, provided that constant work is performed with the same material.
What shouldn't you do?
When processing concrete, stone, brick, hammer drills and hammer drills are often used. In this case, it must be remembered that diamond drills do not tolerate impact - the working layer of crystals is destroyed. Therefore, only the rotary action of the drill is permissible.
Applications
Diamond drills are highly efficient in materials that conventional drills cannot handle.
The mechanical characteristics of the diamond coating make it possible to successfully use such a tool for making holes in materials characterized by high strength:
- tile;
- porcelain stoneware;
- glass;
- concrete;
- brick;
- natural and artificial stone.
Drilling the tile using the holding fixture makes it easier to center the hole
With the help of such a tool (in particular, diamond tubular drills), holes are made in concrete building structures, which are necessary for the installation of electrical outlets. In addition, it is with this type of tool that glass and mirrors are drilled, which makes such drills especially relevant in the production of optical devices for various purposes.Electronics, instrument-making industry and mechanical engineering are those areas where it is practically impossible to do without the use of diamond drills, which are distinguished by the highest hardness.
Diamond core drill for flush mounting
In everyday life, diamond drills are also widespread. Using this tool, they perform drilling in glass and mirrors, ceramic and tile tiles, concrete and products from natural and artificial stone. In order for such drilling to lead to accurate and accurate holes, one should not only choose the right tool for its implementation, but also strictly follow the technological recommendations.
Peculiarities
A diamond drill in modern conditions is made in different ways. The features of the tool depend on the technology. By sintering and processing by powder metallurgy methods, high-quality, wear-resistant tools are obtained. But using this technology, only dimensional models can be made, for example, ring drills. Thus, the products are monolithic, extremely durable, but bulky. If you make small cutting zones using this technology, then the tool will turn out to be fragile, mechanical action will quickly disable it.
Electroplated diamond type. Coated on electroplating equipment, they make tubular diamond drills with a tapered cutting tip. This technology makes it possible to create small diamond-coated tools of complex appearance and design. The grains are arranged in one row here, so the durability is low, especially at the cutting tips of the tool. The resource of such a product is small, but the cost is also quite budgetary.
Diamond type tips do not need cooling and constant sharpening; periodically during operation, you need to reduce the speed. As for the parameters, all drills differ in the following characteristics:
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cutting area size;
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the length of the working part;
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form;
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the number of segments;
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cutting method.
As for the advantages of such drills, there are:
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the possibility of reusable use;
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the quality of the holes being created;
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variability of tools.
Technical features and production technology
A drill with a diamond coating is made either by sintering, when the crystals are joined together by the main alloy of the part during the production process, or by electroplating. Also, the crystal segments are attached to the metal base by laser welding.
The first and third options are typical for parts of significant size, mainly for industrial use. The second is for small models of industrial and domestic use.
To prevent this from happening, holes are drilled in the metal base, if the design allows, to facilitate the flow of air or liquid to the working surface.
If there are no holes, the tool is periodically immersed in water during operation. On an industrial scale, this task is easier to solve: the machine already has a built-in system for supplying fluid to the area of contact between the drill and the workpiece.
Main types
Diamond-type tools are available in a variety of shapes and diameters. They can be generic or material-specific. The working part may look like this:
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by the shape of the cylinder - this is how an annular and tubular drill looks like, a possible diameter range is from 32 to 350 mm;
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in the shape of a ball;
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in the shape of a cone - a traditional look, visually reminiscent of drills on metal surfaces;
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in the shape of a feather (spear).
To ensure rotation, you can use machine tools, electric screwdrivers, screwdrivers, drills. The rotating speed will depend on the diameter and material. The smaller the diameter, the higher the speed. For example, drills ranging in size from 1 to 3 mm will provide a speed of 6 thousand revolutions, and with a diameter of 25 to 50 mm - no more than 1200 revolutions.Conical drills from 20 mm to 85 mm are used for drilling stone, glass, ceramic and tile surfaces.
It is very important to choose the right tool to ensure accurate holes and accurate execution. It is also imperative to follow the recommendations of a technological nature.
An important factor is the choice of the manufacturer of the drills. These three parameters determine how long the tool will last and whether the quality of the work performed will satisfy you.
Types of diamond drills
Let's consider what tools exist in this category.
Among them are:
- conical;
- spherical;
- tubular;
- ring;
- spear-shaped.
The first type is similar to a traditional metal instrument.
The drill looks like a countersink. Diamond coated.
The second has a spherical cutting surface.
This type of diamond drills refers more to cutters.
The third is made in the form of a tube, at one end of which there is a cylinder made of diamond chips.
The fourth is a crown, the cutting surface of which is also covered with diamond crystals. This category contains products of the segmental type, in which the cutting surface is not continuous, but is made in the form of additional elements placed on the working end of the product.
The fifth type got its name from the characteristic shape of the cutting part.
