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extra long wood drill bit is cutting tools used by general drills or drilling machines to cut round holes. The basic principle of the drill is to rotate the cutting edge of the drill, cut the workpiece, and then remove the drill chips from the drill groove.
The greater the ratio of the length to the diameter of the drill bit, the greater the bending tendency. By reducing the aspect ratio, the bending force can be reduced to avoid the drill bit breaking and the hole diameter error increasing. Deeper holes require a larger aspect ratio of the drill bit size. Usually the hole depth is more than 3 times the diameter is a "deep hole", and the hole depth of the micro drill generally exceeds this limit. For example, a drill with a diameter of 3.175mm processes a hole with a depth of 31.75mm, and the aspect ratio reaches 10:1; while a drill with a diameter of 0.508mm processes a hole with a depth of 25.4mm, the aspect ratio reaches 50:1. Therefore, as the diameter of the drill bit decreases and the brittleness increases, deflection becomes the source of many problems. To control the brittleness of the drill bit, it is necessary to consider the hardness and toughness of the tool matrix.
Wood drill bits, of course, also include extra long wood drill bits, generally three-pointed blade, high in the middle and low on both sides. Because the wood is soft, it can be drilled faster, and the cutting edges on both sides can also make the drill hole neat and beautiful.
After reading some knowledge about wood drill bits, let's look at some knowledge about TCT circular saw blades.
The circular saw blade inlaid with carbide tungsten carbide is called TCT circular saw blade for short.
TCT circular saw blades can make real wood. Wood, such as wood-based panels, can also be cut into aluminum alloys, aluminum profiles, radiators and other aluminum materials, and of course plastics. Plastic steel, glass, these are even more important. The purpose of different circular saw blades will be different due to different cutting materials and cutting requirements, so you must first understand or consult customer service or technical personnel before purchasing. Do not blindly follow the trend or buy from hearsay Some circular saw blades that are not suitable for your own trial.

With our current technical level, we can know that the diamond in the Diamond cup grinding wheel are composed of carbon structure, but in ancient times, people's technical level is not high, how to determine its structure? This really took a lot of effort.
In ancient Greece, many philosophers believed that diamonds consisted of four elements: earth, air, water and fire.
In 1704, Newton conducted a systematic study of diamonds and finally confirmed the flammability of diamonds.
In 1772, French chemists discovered by burning diamonds that the gas produced during the combustion process was carbon dioxide.
It was not until 1796 that British chemist Knight concluded that diamonds were pure carbon. Before this, everyone associates diamond with carbon.
But why is there such a big gap between the hardness of diamond and carbon in the same carbon structure?
We still have to start with the source of the diamond.
In 1870, the world's first primary diamond mine was discovered in Cape Town, South Africa. This place is named after Lord Kimberley, then British Colonial Secretary. It was Kimberley City that was discovered. Therefore, the diamond mother rock is called kimberlite.
So far, the Kimberley diamond mine in South Africa has unearthed nearly 2,700 kilograms of diamonds, and the South African government is also trying to apply for the Kimberley mine as a world cultural heritage.
Later, people found the same parent rock all over the world and confirmed that Kimberlite is the only diagenetic diamond parent rock.
Since then, through exploration and experimentation, it is believed that diamonds crystallized from the free carbon contained in the kimberlite itself during the process of violent ascent and explosion, and under high temperature and pressure. People also began to produce artificial diamonds on the assembly line on this basis.
Despite the discovery of so many diamonds, the source of the diamonds is still unclear.

Tungsten carbide hole saws hardening treatment It is worth noting that high-speed flame spraying has developed rapidly, occupying about a quarter of the market and ranking second. The development trend and characteristics in recent years are: large-area long-term protection technology has been widely used, and those steel structural parts exposed to the outdoor atmosphere for a long time are sprayed with aluminum, zinc and their alloy coatings instead of traditional painting methods.
Tungsten carbide hole saw hardening treatment coating is mostly a single metal or alloy, such as titanium target, zinc, cadmium, gold or brass, bronze, etc.; there are also dispersion layers, such as nickel-silicon carbide, nickel-fluoride graphite and so on. There are also clad layers, such as copper-nickel-chromium layer on steel, silver-indium layer on steel, etc. In addition to iron-based cast iron, steel and stainless steel, there are non-ferrous metals, such as ABS plastic, polypropylene, polysulfone and phenolic plastic, as the base material of the hardening treatment of the tungsten carbide hole saw. However, the plastic must undergo special activation before plating. And sensitization treatment. Tungsten carbide hole saw hardening is the process of plating a thin layer of other metals or alloys on the surface of some metals by electrolysis. During electroplating, the plated metal is used as an anode, which is oxidized into cations and enters the electroplating solution; the metal product to be plated is used as a cathode, and the cations of the plated metal are reduced on the metal surface to form a plating layer.
The hardening treatment of tungsten carbide hole saw has good insulation and chemical stability, but the texture is fragile and the forming of large workpieces will be difficult. However, through thermal spray coating technology, a ceramic coating is prepared on the workpiece to replace rubber And resin inlay layer can still be successful.

Tungsten carbide will also be used to make hole saws, which is what we often call tungsten carbide hole sawsWhat is tungsten carbide:
1. It is widely used as high-speed cutting tools, kiln structural materials, jet engine parts, metal ceramic materials, resistance heating elements, etc.
2. Used to manufacture cutting tools, wear-resistant parts, melting crucibles for metals such as copper, cobalt, and bismuth, and wear-resistant semiconductor films.
3. Used as super hard tool material and wear-resistant material. It can form a solid solution with many carbides. WC-TiC-Co carbide tools have been widely used. It can also be used as a modified additive of NbC-C and TaC-C ternary system carbides, which can reduce the sintering temperature and maintain excellent performance. It can be used as aerospace materials.
4. Use tungsten anhydride and graphite to synthesize tungsten carbide (WC) powder at a high temperature of 1400~1600℃ in a reducing atmosphere. Dense ceramic products can be obtained by hot pressing sintering or hot isostatic pressing sintering.
Extended information
The theoretical carbon content of tungsten carbide is 6.128% (atomic 50%). When the carbon content of tungsten carbide is greater than the theoretical carbon content, free carbon (WC+C) appears in the tungsten carbide. The presence of free carbon will carbonize the surrounding area during sintering. The growth of tungsten grains results in uneven grains of cemented carbide; tungsten carbide generally requires high combined carbon (≥6.07%) free carbon (≤0.05%), and total carbon is determined by the production process and scope of use of cemented carbide.
Tungsten carbide WC grain size requirements of cemented carbide, according to different uses of cemented carbide, use different grain size tungsten carbide; cemented carbide cutting tools, such as cutting machine blade V-CUT knife, etc., the finishing alloy adopts ultra-fine sub Fine-grain tungsten carbide; medium-grain tungsten carbide is used for rough machining alloy; medium and coarse-grain tungsten carbide is used as raw material for gravity cutting and heavy-duty cutting alloy.
For mining tools, the rock hardness is high and the impact load is large. Coarse particle tungsten carbide is used; the rock impact is small and the impact load is small. Medium particle tungsten carbide is used as the raw material for wear-resistant parts; when its wear resistance, pressure resistance and surface finish are emphasized, ultrafine sub-fine is used Fine and medium-grain tungsten carbide is used as raw material; impact-resistant tools are mainly made of medium- and coarse-grained tungsten carbide.
Storage: It should be stored in a cool and dry warehouse. During transportation, the packaging container should be intact and protected from rain and sunlight.
Packaging, storage and transportation: The products are packed in iron drums (plastic drums) lined with polyethylene plastic bags, and the net weight of each bag shall not exceed 50kg. The words "moisture proof" and "upward" should be on the outer packaging barrel. The product should be stored in a cool and dry warehouse, and the packaging container should be intact and protected from rain and sunlight during transportation.
Tungsten carbide will also be used to make hole saws, which is what we often call tungsten carbide hole saws

Diamond grinding wheel is a kind of diamond tool, which is mainly suitable for the surface grinding processing of various refractory materials. The product adopts specially designed tapered mounting hole structure, which is easy to install and unload, has good processing flatness, high grinding efficiency, It has the advantages of high service life and can be applied to all domestic and imported grinding equipment.
Chinese name: diamond English name: diamond Definition: An allotrope of carbon, which is the hardest known substance. There are two types of natural and artificial. Subject: Mechanical Engineering (first-level discipline); Abrasives (second-level discipline); Abrasives (third-level discipline) Diamond is commonly known as "diamond diamond". This is what we often call diamond, which is a mineral composed of pure carbon. Diamond is the hardest substance in nature. The use of diamond is very wide, such as: handicrafts, cutting tools in industry. Carbon can form diamond at high temperature and high pressure.
Diamond cup grinding wheel, is made by welding or cold pressing diamond blades on a metal substrate; diamond blades are made by artificial industrial diamond and other metal powders, cold pressing and hot pressing sintering, and then Welded on the metal substrate in the shape of a bowl. Diamond grinding wheels are usually installed on concrete grinding machines to polish concrete, granite, marble and other stones. Diamond grinding wheels come in different types and specifications to cater to different application needs. They are commonly used to polish concrete, stone, paint, glue, epoxy and other ground coatings. Diamond cutter heads have different matrixes, different particle sizes and different diamond concentrations; the matrix can be divided into hard, medium, and soft, etc.; the particle size can be divided into coarse, medium, fine, etc.; so their quality and use are different ; For ground grinding with different roughness, we should also choose a more appropriate particle size. Generally, for rough grinding, we should choose a softer carcass and a high-quality grinding wheel. The particle size can be large. For example, 16#, 20# or 30/40# for grinding. Choosing this kind of suitable grinding wheel can increase work efficiency; for fine grinding, we can also call polishing. We can choose hard matrix and fine-grained grinding wheels. The degree is like 80# -120#, and other finer particle sizes can also be selected according to the needs of polishing. (Article by M-inuo Diamond Tools)

There are many kinds of bit structures, and the structure of Extra Long Wood Drill Bit must meet the following requirements:

1. The cutting part suitable for drilling conditions must have normal angle and size;

2. When drilling, the chips can be separated freely and discharged out of the hole in time as they are formed;

3. It can be grinded many times conveniently, and the angle value and main dimension parameters of the cutting part after grinding are unchanged;

4. Maximum productivity and good processing quality.

The structure of drill bit depends on its working conditions: relative to the drilling direction of fiber, drilling diameter, drilling depth, and required machining accuracy and productivity. The following common structures of extra-long wood drill bit are mainly introduced.

(1) The end of the cylindrical head center drill bit is cylindrical, with two cutting edges and a spiral groove. This drill is mainly used for drilling shallow holes with horizontal stripes, but the drilling depth is deeper than that of flat drills at a larger feed speed.

(2) Drill the round counter cutter bit in the center of the round counter cutter and the toothed counter cutter.

The tungsten carbide hole saws is also one of our product, welcome to click our website:

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