The crown of the tree: the sizes and types of baits, particularly the use of

Chisel as a main joinery device for making holes and recesses in the wood largely lost its relevance. Together with this problem left curves cavities and the need for constant grinding tool. Time-consuming process is simplified thanks to the device, the ability to easily perform a circular hole. The crown of the tree makes the holes perfectly smooth in minutes.

Variety of drills on a tree: by thin spirals to the crowns of large diameter

Wood is a versatile material that can be used both in the manufacture of fine decorative elements and the construction of buildings and other large-scale objects. Wood is easy to treated, for this purpose, industry produces a large number of tools for different purposes. Among them are the following:

• drill spiral type. Such a tool is in almost every home. Diameter of nozzles has a range of 3-52 mm. Drills up to 10 mm are made with smooth shank, more powerful products are equipped with an Allen element which promotes lasting clip that is necessary due to the increased load on the cutting segment;

• feather drill. The tool is quite complex in their work. It looks like a knife, sharpened on all sides. The functionality of such a packing limited, deep holes are not recommended to do it, because it is not provided for chip removal;
• Forstner drill. The side blades arranged circumferentially. The tool provides a very clean cut, made of durable carbon steel;
• crowns. It drills for wood of large diameter, having a cutting edge in the form of teeth disposed on a circular end face.

The contents of this article will be devoted to the crown of their technical characteristics and methods of use.

The drill-bit on a tree: apparatus and principle of operation

Hole saws for wood, also known as the crown, core drill bit or end mill, is formed into a cylindrical shape, one edge of which ends with the shank, and the second has a toothed cutting edge. This device is a nozzle for twisting elements drills, rotary hammers, screwdrivers, for manual work. Perhaps the use of rotary cutters and machine tools.

The crown is set into a special glass, fixed nut. Included with each annular saw is a drill, projecting beyond the line of cutting teeth that can accurately determine the center of the hole and provide a receipt perfectly straight cut.

The crown may be either a monolithic structure - a cylinder with a serrated edge, and a folding - cutting rings of different sizes are inserted into the circular bearing seat.

If necessary to perform correct and perfectly clean hole used bimetallic crown of the tree. They are made of high-strength steel and cobalt. This connection makes the instrument durable in operation.

Useful advice!When choosing the crown of the tree should carefully examine its technical specifications and to compare with your existing punch (drill, screwdriver) snap-in. Non-compliance can lead to damage of the crown, as well as damage to the power tool

Technological parameters and dimensions of crowns on a tree

Operational capabilities of the crown depends on its technological parameters. They are evaluated when choosing a particular type of nozzle. The basic parameters include:

• height. It is equal to the distance from the surface to a sample point at the bottom which performs the mill in a single pass. Usually it is the standard and is 40 mm;

• diameter. Crowns for wood vary depending on the outer diameter of the cutting part. Products of the sets have a record of 30-150 mm. Diameter of nozzles sold separately can reach 300 mm;
• the number and profile of the teeth. The greater the diameter of the crown, the larger number of teeth is equipped with a cutting edge. They may take the form of an equilateral triangle or there with the top tilted at 30-40 ° (the slope of the same in all of the teeth);
• Additional functions of the instrument. Some devices can perform reverse rotation, that is, to change the direction of movement of the crown. This option is most often used by professionals in their work;
• engine power and the ability to adjust the speed. These figures should be comparable to the type of nozzle. For example, using the tree crowns 68 mm permissible speed is 950 rev / min. For crowns 110 mm - 500 rev / min. The more the crown, the smaller the number of revolutions required for quality performance.

Important!If it is impossible to work the power tool to reduce the number of turns you should use a special stand, which can be purchased in the respective stores.

Scope and operational features of the tree crowns 50, 60, 68 mm

One often used is a crown diameter of 50 mm. It can be sold either separately or together. Performed attachment of carbon steel, but you can find products and tempered metal. Number of cutting teeth - 30-34 pcs. Processing the tree crown 50 mm permitted any kind of natural material, including wood boards with a laminated coating.

For hardwood trees (oak, hornbeam, beech, etc. D.) Is better to use a circular saw, made of carbon steel or bimetal. These tips will cope well with the dense structure by performing a neat and correct the slice, and serve much longer.

The technical and operational characteristics of the tree crowns 60 mm largely coincide with the properties of models diameter of 50 mm described above. Option claimed, used for different household needs, as well as in the manufacture of furniture. Purchase crown diameter 50 to 60 mm can be in any store which sells power tools, as well as directly from the manufacturer. The second option does not require an overpayment for commercial services. The simplest metal model will cost 100-130 rubles.

Crown diameter of 68 mm - "classics of the genre." This is the most common and frequently used model, as it can help make Enclosures in wooden walls and wall sandwich panels, which include wood-based panels. Executed nozzle alloyed or carbon steel, which provides an ideal cut wood of any quality.

The crown of the tree 100 mm, 110 mm, 120 mm species, price, production material

Bore diameter of 100, 110, 120 mm are most often used for making ornamental articles. During the repair can use them to set the boxes of various communications. This requires the diameter of the respective power output, which will be attached to the nozzle, and it should not be less than 800 watts.

Crown of tree 110-120 mm refer to the mean dimension type, so they are all manufacturers, so you can choose a suitable option for both technical and in price indices.

Products can be sold by individual nozzles, or in the form of removable rings in the kits. As a material used for making high-strength steel. Some manufacturers (Bosh, Matrix, Biber) Bimetallic hole saws do such diameter that differ high strength and good resource.

Prior to use, the size of the nozzles do not need to pre-sawing holes, and after the drilling is not necessary to process the inner surface.

nozzles data significant variation in prices. For example, the crown of the tree 120 mm Matrix costs 300 rubles, an analogue of the manufacturer's "Encore" - 80 rubles.

The technical and operational characteristics of the tree crowns 127 mm, 150 mm, 160 mm

Crowns for wood 127, 150, 160 mm refers to the large-diameter nozzles. Almost all of them are bi-metal models as durable cutting tool required for drilling large holes. Crown 127 mm in diameter may be sold separately, but more often it is the large shower head in a set of crowns.

Price single bimetallic version is 1000 rubles. Set of metal crowns can be bought almost for the same money - 900-1000 rubles.

Crown of the tree 150 mm successfully used during repair. With their help make holes for ventilation, lighting and developing are septic tank. For such a power tool bits necessary with adjustable speed. The first gash made at a frequency of 950-1300 rev / min for the next rotation speed should be reduced to 500-600 rev / min.

Especially popular are the crown DeWalt and Bosh. Product manufacturer data have increased strength, in which the cutting portion is not damaged even in contact with metallic elements.

Crown of the tree 160 mm can be used for decorative woodworking, as well as in the construction or repair work in houses built of timber. Such bimetallic head passes even the most solid wood layers, leaving a perfect interior surface. The technical and operational characteristics substantially coincide with those crowns 150 mm, but the price somewhat higher (10-12%).

Useful advice!Drill the holes in the crowns of large diameter wood chipboard, it is not necessary to press on a cutting edge in the case of passage hindered - by the upper edges of the small holes can be formed chipped.

Crown of the tree 210 mm: selection of power tools, prices

Crown diameter of 210 mm - a reliable attachment. Most often acquire its professionals to carry out construction and repair work. And to make the holes it is possible not only for timber but also in the cast, sheet steel, plastic. The product bimetallic, durable.

Not every power tool is compatible with such a nozzle. This can be a powerful punch or drill. No screwdriver will not provide a full-fledged operation of such circular saws. Power devices should not be less than 1300 watts. Obligatory function change speed frequency. The nozzle of this size are often used for stationary devices, as in the manual mode to work with a hammer mill is problematic.

For trouble-free and high-quality work on the tree crowns of large diameter (210-250 mm) should be set the speed correctly:

• the optimum rate of drilling soft drevesiny- 350-400 rev / min;
• when the holes in hardwood - 500-600 rev / min.

These tips usually sold as a separate option, rather than complete. The price of a crown 210 mm in diameter is significantly different from different manufacturers. For example, such a hole saw US company DeWalt will cost 630 rubles. Nozzle with absolutely identical technical and operational characteristics of "Zubr" is worth 1030 rubles.

Crowns Wood Bosch: types of baits, application, price

Bosch tools have long settled in the domestic market and almost always occupied a leading position. Bosch - brand that does not use bylymi merit and continuous improvement confirms the status of technology. Products of this manufacturer distinguish the following characteristics:

• good quality material. Nozzles small diameter mostly made of high speed steel, the crown of the tree 110 mm or more - bi (Cobalt alloyed high speed steel), resistant to mechanical stress and ensure clean cut when performing holes;

• the diversity of species. Bosch offers bits in size from 14 to 152 mm, with a complete set of the sets of nozzles 5-13, 5-8 crowns sawing elements. The latter are convenient embodiment for performing coarse holes in hard and soft materials;
• optimum equipment. All bits of this manufacturer come with adapters Power Change: for drills - a hexagon, for rotary - mount SDS Plus.

Related article:

The crown on the concrete: an effective solution to repair issues

The crown on the concrete. Principle of operation, the main types of nozzles. Standard sizes crowns particular application. tool life. Fundamentals of the correct choice.

Crowns Bosch can make holes in sheet metal, wood, laminated wood boards, drywall, plastic, laminate, laminates. Price crowns varies from 400 rubles per nozzle of 14 mm, 1,000 rubles for the crown of the tree 120 mm to 3500 rubles per ring bimetallic saw 300 mm.

Important!Selecting Bosch crown worth while to acquire cutting oils and spare centering drill (in the event that planned to intensive and prolonged use of circular saw) this manufacturer. These necessary consumables provide quality work tool for a long time.

Worthy product of domestic production: a set of crowns on a tree "Zubr"

"Bison" - a domestic manufacturer of electric hand tools, including drills and circular for wood, wood materials, plaster, plastic. Especially popular are the sets of the tree crowns. "Bison" - a company that not only produces a quality product, but also ensures its rightful support, customer care. Picking up a carton, it is easy to find on it all the necessary information about the number of items, as the material, method of use and according to power tool.

Units set which is accommodated in a compact plastic case, on the inner side of the upper part of which there is a detailed diagram of the nozzle assembly. Standard kit includes the following items: 5 hole saws, center drill, hex shank, overhead rail and key. The kits may have a different size drill: from 64 to 102 mm, from 33 to 83 mm, etc...

The basic material for the manufacture of crowns Wood "Bison" - high quality carbon steel. The average grit tungsten carbide, which is the basis of the deposition, allows smooth cuts and greatly extends the life of the cutting edge.

Set of ring nozzles worth 500-700 rubles. Sets with lots of circular saws (10-12) have a price of 1000-1500 rubles.

Affordable and functional variant: the crown of the tree, "Anchor"

Crowns "Anchor" made in China, sold by a Russian company, located in Voronezh. In comparison with these products Bosch nozzles are more simplified version, but they do not lose its performance. With their help, you can blind and through holes in the wood, wood panels, gypsum board and plastic.

For the manufacture of nozzles used mainly high-strength steel, which has an outer coating that protects against corrosion. Objectivity it should be noted that the protective layer during the work significantly damaged by mechanical impact, so it is necessary to provide conditions for preservation tool.

Bits "Anchor" to 65 mm have a shank diameter of 19 mm, the crown of the tree 68 mm and equipped with a fastening 32 mm.

It should be noted that products of this manufacturer are diverse sizes that allows you to choose the desired diameter of the hole and run without additional reaming and unnecessary voids. For example, in the range of 80 to 90 mm can select a nozzle 80, 82, 85, 88, 90 mm.

Characterized Hole Saws "Anchor" and the affordable prices. Crown 22 mm actually purchased for only 50 rubles. Very chassis variant nozzle diameter of 70 mm costs 100 rubles. Price bits 127 mm - 175 rubles.

Hole saws of the manufacturer does not differ a great resource. With proper use and storage they will serve long, adequately fulfilling its purpose.

The simplicity of the device and opportunities: Ballerina on wood

If necessary to perform drill may be used in the material of the large-diameter hole, which domestic obtained very harmonious name - Ballerina (external similarity divorced cutting elements of the device with the image dancer). Such device consists of a centering drills and cutters that are moved apart along the track in opposite directions by the same distance, thereby outlining the diameter dimensions of the future opening. Most of balerinok has two cutting edge, but there are models with three.

The principle of operation of the variety of the crown for drilling:

• makes central drill hole in the material;
• cutters scheduled line of the circle that defines the size of the future deepening;
• manually (using brace) or via a rotary power driven device.

Ballerina can be made holes in wood, wood materials, drywall, ceramic tile, plastic. This nozzle is inexpensive and quite suitable for amateurs.

Useful advice!Applying Ballerina as a nozzle for manual mechanism, efforts should be made in the implementation of the first alignment and rotational motions of the incisors, outlining the future of the recess. Unsure movement may cause chipping at the upper edge of the material.

The crown of the tree: conditions of correct operation

The tool to function properly, it must be used properly. This means compliance with the rules and requirements of technical conditions applied in accordance with the purpose and compliance with the rules in the works:

• Drill with a nozzle-crown can not operate continuously for a long time, as much heated. You must either be equipped with a tool extra cooling or make the 15-minute break after every 30-40 minutes of operation;

• special crown Drywall manufacturers do not make, for drilling the material used cutters on wood. Power from the power torque can be far below the optimum parameter for drilling, e.g., beech;
• when working with crowns should take into account the way the connection with the cylinder liner. If you apply a flat soldering, to avoid side loads on the unit and be sure to take breaks in order to prevent overheating and the appearance of defects in the junction. In that case, when the shank is embedded in the landing part of the crown and soldered, there is additional support - shoulder, whereby the bonding strength becomes much higher;
• you must pay attention to the price of the tree crowns. You can not operate intensively bought for 50-70 rubles nozzle and count on its long-term high-grade work. In this type of price tools and resources are directly dependent.

Any tool requires skillful use of them. In working with crowns-nozzles is not so much experience, how much awareness regarding the technical capabilities of the device and the target application. The market offers a circular saw for craftsmen, amateurs and professionals alike. It is important to choose wisely.

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