One of the hardest minerals is diamond. That is why special diamond drills are used to process a variety of materials characterized by high strength. They are made by sintering technology, which allows to obtain products of high density.
Today, a diamond drill can be made with a wide variety of nozzle shapes: cylindrical, ball, conical, and many others. Certain varieties of this tool are used for working with glass or ceramics. Conical nozzles are made, as a rule, with a diameter of sixteen to eighty-five millimeters. They are used when working with glass for grinding holes. The resistance of such a tool to a state of wear is about ten to fourteen meters, and in natural stone is nine to twelve meters.
Tools of this type do not require constant cooling and sharpening during work. From overheating, they can be easily protected by periodic immersion in a container with cold water. In addition, the use of the tool at a low rotational speed helps well from increasing the temperature during application. Before starting work, be sure to tilt the place of the upcoming drilling.
Modern diamond drills are produced either using the powder metallurgy method , or by the galvanic method. The use of the latter allows you to make tools of absolutely any configuration, but, due to the single-row arrangement of grains, characterized by a rather low degree of resistance of sharp edges. The method of powder metallurgy allows to obtain diamond drills with a very high degree of resistance. However, using this method, it is possible to produce exclusively large diameter tools. This is because for the strength of the structure to be created, gaps between diamond grains are required, and with small drill sizes, these gaps are equal to the grain sizes, and the tool ultimately collapses. Edge resistance and its effectiveness decrease.
Experts recommend the use of diamond drills when performing particularly complex jobs for which the use of traditional carbide-type drills is impossible or difficult. Also, this tool is actively used in everyday life, in the mass production of mirrors, during stone processing and a variety of
construction and installation works. For example,
diamond drilling of holes in concrete is very common. In addition, tools of this kind are used when working with various especially hard and hardened alloys, glass and ceramics, as well as in the optical, watch and jewelry industries. Separately, it is worth noting electronics, instrument making, mechanical engineering and all those areas where materials with high hardness are currently used. In this case, only a diamond drill will act as an effective tool for processing holes.