July292022

Crown on wood: sizes and types of attachments, application features

The chisel as the main carpentry device for making holes and recesses in wood has largely lost its relevance. Along with this, the problem of curved cavities and the need for constant sharpening of the tool disappeared. The time-consuming process is simplified thanks to a device that can easily perform circular drilling. The wood crown makes the holes perfectly smooth in a matter of minutes.

Crowns are large diameter wood drills with a cutting edge in the form of teeth

Types of wood drills: from thin spirals to large diameter crowns

Wood is a universal material that can be used both in the manufacture of elegant decorative elements and in the construction of buildings and other large-scale objects. Wood is easily processed, for this purpose the industry produces a large number of tools for various purposes. Among them are the following:

spiral type drills. Such a tool is available in almost every home. The diameter of the nozzles has a range of 3-52 mm. Drills up to 10 mm are made with a smooth shank, more powerful products are equipped with a hexagonal element, which contributes to a strong clamp, which is necessary due to the increased load on the cutting segment;

One of the types of ring drills is considered to be a crown on wood

feather drills. The tool is quite difficult to work with. It looks like a knife sharpened from different sides. The functionality of such a nozzle is limited, it is not recommended to make deep holes with it, since there is no chip removal;
Forstner drills. The side blades are arranged around the circumference. The tool gives very clean cuts, is made of durable carbon steel;
crowns. These are large-diameter wood drills with a cutting edge in the form of teeth located on a round end.

The content of this article will be devoted specifically to crowns, their technical characteristics and methods of application.

Drill bit for wood: device and principle of operation

A circular saw for wood, which is also called a crown, a crown drill or an end mill, is made in the form of a cylinder, one edge of which ends with a shank, and the second has a serrated cutting edge. This device serves as a nozzle for the torsion elements of drills, drills, screwdrivers designed for manual work. Circular milling cutters can also be used for machine tools.

The crown is installed in a special glass, fixed with a nut. Included with each circular saw is a drill protruding beyond the line of cutting teeth, which allows you to accurately determine the center of the hole and ensure a perfectly smooth cut.

The cutting head is made in the form of a single cylindrical edge with sharp teeth

The crown can be either a monolithic structure – a cylinder with a serrated edge, or a collapsible one – cutting rings of different sizes are inserted into a round seat.

If necessary, bimetallic crowns on wood are used to make a perfectly correct and clean hole. They are made of high-strength steel and cobalt. This connection makes the tool durable in operation.

Useful advice! When choosing a crown for wood, it is necessary to carefully study its technical characteristics and compare it with the equipment available at the perforator (drill, screwdriver). A mismatch can lead to both damage to the crown and damage to the power tool.

Technological parameters and dimensions of crowns on wood

The operational capabilities of the crown directly depend on its technological parameters. They are evaluated when choosing a particular type of nozzle. The main indicators should include:

height. It is equal to the distance from the surface to the lowest sampling point that the cutter performs in one pass. It is usually standard and is equal to 40 mm;

The crown consists of a cutting head, a shank and a guide drill with a pointed end

diameter. Crowns on wood differ depending on the outer diameter of the cutting part. Products from the sets have an index of 30-150 mm. The diameter of the separately sold nozzles can reach 300 mm;
the number and profile of teeth. The larger the diameter of the crown, the more teeth the cutting edge is equipped with. They can have the shape of a regular triangle or they can have a vertex tilted by 30-40 ° (the slope is the same for all teeth);
additional functions of the tool. Some devices can perform reverse rotation, that is, 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 number of revolutions. These indicators should be comparable with the type of nozzle. For example, when using a 68 mm wood crown, the permissible number of revolutions is 950 rpm. For a crown of 110 mm – 500 rpm. The larger the crown, the smaller the number of revolutions needed for high-quality work.

Important! If it is impossible to reduce the number of revolutions on a working power tool, you should use a special stand that can be purchased at the appropriate stores.

Scope of application and features of operation of crowns on wood 50, 60, 68 mm

One of the most commonly used is a crown with a diameter of 50 mm. It can be sold either separately or as a set. The nozzle is made of carbon steel, but you can also find products made of hardened metal. The number of cutting teeth is 30-34 pcs. Any type of this natural material is allowed to be treated with a 50 mm wood crown, including laminated wood slabs.

Samples with a diameter of 68 mm are suitable for many types of work

For hardwoods (oak, hornbeam, beech, etc.), it is better to use circular saws made of carbon steel or bimetal. Such nozzles will cope well with a dense structure by performing a neat and correct cut, and will also last much longer.

The technical and operational characteristics of 60 mm wood crowns largely coincide with the properties of models with a diameter of 50 mm described above. The option is in demand, it is used for various household needs, as well as in the manufacture of furniture. Crowns with a diameter of 50, 60 mm can be purchased at any shop selling power tools, as well as directly from the manufacturer. The second option will not require overpayment for commercial services. The simplest metal models will cost 100-130 rubles.

The crown with a diameter of 68 mm is a “classic of the genre”. This is the most common and frequently used model, since it is used to make sockets for sub-cabinets in wooden walls and wall sandwich panels, which include wood slabs. The nozzles are made of alloy or carbon steel, which provides an ideal cut of wood of any quality.

Wood crown 100 mm, 110 mm, 120 mm: types, prices, material of manufacture

Crowns with a diameter of 100, 110, 120 mm are more often used for the manufacture of decorative products. During the repair, they can be used to install junction boxes of various communications. This diameter requires the appropriate power of the power tool to which the nozzle will be attached, and it should not be less than 800 watts.

Using nozzles with a diameter of 120 mm, you need to select the appropriate power tool

Crowns on wood 110-120 mm belong to the average size type, so they are available from all manufacturers, which allows you to choose the appropriate option both in terms of technical and price indicators.

Products can be sold in separate nozzles or in the form of removable rings as part of sets. High-strength steel is used as a material for manufacturing. Some manufacturers (Bosh, Matrix, Biber) make bimetallic circular saws of this diameter, which are characterized by great strength and good resource.

Prior to using nozzles of this size, it is not necessary to carry out preliminary sawing of the hole, and after drilling there is no need to process the inner surface.

The price spread of these nozzles is significant. For example, a 120 mm Matrix wood crown costs 300 rubles, an analog from the Encor manufacturer costs 80 rubles.

Crowns can be sold as separate attachments or in the form of removable rings as part of kits

Technical and operational characteristics of crowns on wood 127 mm, 150 mm, 160 mm

Crowns on wood 127, 150, 160 mm refer to nozzles of large diameter. Almost all of them are bimetallic models, since drilling significant holes requires a durable cutting tool. A crown with a diameter of 127 mm can be sold separately, but more often it is the largest nozzle in a set of crowns.

The price of a separate bimetallic variant reaches 1000 rubles. A set of metal crowns can be purchased for almost the same money – 900-1000 rubles.

Crowns on wood of 150 mm are successfully used when performing repair work. With their help, holes are made for ventilation, lamps, septic tanks are equipped. Such a crown requires a power tool with the ability to adjust the number of revolutions. The first washings are made at a frequency of 950-1300 rpm, for subsequent ones the rotation speed must be reduced to 500-600 rpm.

DeWalt and Bosh crowns are particularly popular. The products of these manufacturers have increased strength, in which the cutting part is not damaged even when it hits metal elements.

Crowns with a diameter of 127 mm are most often sold in sets

Crowns on wood 160 mm can be used to perform decorative work on wood, as well as during construction or repair work in houses built of timber. Such a bimetallic nozzle successfully passes even the hardest wood layers, leaving behind an ideal inner surface. Technical and operational characteristics almost coincide with the properties of crowns 150 mm, but the price is slightly higher (by 10-12%).

Useful advice! When making holes with large-diameter crowns in chipboard, it is not necessary to put pressure on the cutting edge in case of a difficult passage – small chips may form on the upper edges of the hole.

Crowns on wood 210 mm: selection of power tools, prices

The crown with a diameter of 210 mm is a reliable nozzle. More often it is purchased by professionals to perform construction and repair work. Moreover, it is possible to make holes with it not only in wood, but also in gypsum, sheet steel, plastic. The product is bimetallic, durable.

Not every power tool is compatible with such a nozzle. It can be a hammer drill or a powerful drill. No screwdriver will ensure the full operation of such a circular saw. The power of the device should not be lower than 1300 watts. The function of changing the speed is mandatory. A nozzle of this size is often used for stationary devices, since it is quite problematic to work with a rotary hammer with such a cutter in manual mode.

The price of crowns with a diameter of 210 mm differs significantly from different manufacturers

For smooth and high-quality work of crowns on wood of large diameter (210-250 mm), the number of revolutions should be set correctly:

the optimal indicator for drilling soft wood is 350-400 rpm;
when making holes in hard wood – 500-600 rpm.

These nozzles are more often sold as a separate option than as a set. The price of crowns with a diameter of 210 mm differs significantly from different manufacturers. For example, a similar circular saw of the American company DeWalt will cost 630 rubles. A nozzle with absolutely identical technical and operational characteristics of the “Bison” costs 1030 rubles.

Bosch wood crowns: types of attachments, application, prices

Bosch tools have long been established in the domestic market and occupy a leading position almost all the time. Bosch is a brand that does not enjoy its former merits, but confirms its status by constantly improving technologies. The products of this manufacturer are distinguished by the following characteristics:

good quality of the material. Nozzles of small diameter are mainly made of high–speed steel, crowns on wood of 110 mm or more are bimetallic (high-speed steel is alloyed with cobalt), resistant to mechanical loads and providing an even cut when making holes;

Bosch crowns are hardy, do not overheat, do not deform during sawing

variety of species. Bosch offers crowns ranging in size from 14 to 152 mm, kits with a set of 5-13 nozzles, saw crowns for 5-8 elements. The latter are a convenient option for making rough holes in hard and soft materials;
optimal configuration. All crowns from this manufacturer come with Power Change adapters: for drills, it is a hexagon, for punchers, it is an SDS Plus mount.

Concrete crown: effective solution of repair issues

Crown on concrete. The principle of operation, the main types of nozzles. Standard sizes of crowns, application features. The resource of the tool. The basics of making the right choice.

Bosch crowns can be used to make holes in sheet metal, wood, laminated wood slabs, drywall, plastic, laminate, and multilayer materials. The price of crowns ranges from 400 rubles for a 14 mm nozzle, 1000 rubles for a 120 mm wood crown to 3500 rubles for a 300 mm ring bimetallic saw.

Important! Having chosen a Bosch crown, it is worth simultaneously purchasing lubricating and cooling oil and a spare centering drill (in the event that intensive and long-term use of the circular saw is planned) from this manufacturer. These necessary consumables will ensure high-quality operation of the tool for a long time.

A worthy product of domestic production: a set of crowns on wood “Bison”

Zubr is a domestic manufacturer of hand–held power tools, including ring drills for working on wood, wood materials, gypsum, plastic. Sets of crowns on wood are especially popular. Zubr is a company that not only produces high–quality goods, but also provides its worthy support, taking care of customers. Picking up a cardboard package, you can easily find on it all the necessary information about the number of items, the quality of the material, the method of application and compliance with the power tool.

The Zubr company produces crowns on wood with centering drills made of high-tech tool steel

The set units are conveniently placed in a compact plastic case, on the inside of the upper part of which there is a detailed assembly diagram of the nozzle. The standard set includes the following elements: 5 ring saws, a centering drill, a hex shank, an overhead bar and a key. The kits can have drills of different sizes: from 64 to 102 mm, from 33 to 83 mm, etc.

The main material for making crowns on wood “Bison” is high–quality carbon steel. The average crumb of tungsten carbide, which forms the basis of spraying, allows you to make smooth cuts and significantly prolongs the service life of the cutting edge.

A set of ring nozzles costs 500-700 rubles. Sets with a large number of circular saws (10-12) have a price of 1000-1500 rubles.

Affordable and functional option: crowns on wood “Anchor”

Anchor crowns are manufactured in China, sold by a Russian company located in the city of Voronezh. In comparison with Bosch products, these nozzles are a more simplified version, but they do not lose their performance. With their help, you can make blind and through holes in wood, wood slabs, drywall and plastic.

Anchor crowns are installed on a conventional household drill, suitable for working with wood, plastic, plywood, chipboard, MDF

For the manufacture of nozzles, mainly high-strength steel is used, which has an external coating that protects against corrosion. For the sake of objectivity, it should be noted that the protective layer is significantly damaged during operation from mechanical influences, therefore, it is necessary to provide the necessary conditions for the safety of the tool.

Anchor nozzles up to 65 mm have a shank with a diameter of 19 mm, crowns on wood of 68 mm or more are equipped with a 32 mm mount.

It is worth noting that the products of this manufacturer differ in a variety of sizes, which allows you to choose the right diameter and make a hole without additional drilling and unnecessary voids. For example, in the range from 80 to 90 mm, you can choose a nozzle 80, 82, 85, 88, 90 mm.

Ring saws “Anchor” are characterized by affordable prices. A 22 mm crown can really be purchased for only 50 rubles. A very popular version of the nozzle with a diameter of 70 mm costs 100 rubles. The price of a 127 mm crown is 175 rubles.

Bimetallic products do not blunt for a long time, even when in contact with nails, fittings

Ring saws of this manufacturer are not distinguished by a large resource. With proper use and storage, they will serve for a long time, adequately fulfilling their purpose.

Simplicity of the device and wide possibilities: ballerina on wood

If it is necessary to make a large diameter hole in the material, a drill can be used, which in everyday life has received a very euphonious name – a ballerina (by the external similarity of the divorced cutting elements of the device with the image of a dancer). Such a device consists of a centering drill and cutters, which are moved apart in different directions by the same distance along the guide, thereby outlining the dimensions of the diameter of the future hole. Most ballerinas have two incisors, but there are models with three.

The principle of operation of this type of crown for drilling:

the central drill makes a hole in the material;
the incisors outline a circle line that determines the size of the future recess;
the device is set in motion manually (using a rotary rotation) or with the help of a rotary power tool.

Most ballerinas have two or three incisors

A ballerina can make holes in wood, wood materials, drywall, ceramic tiles, plastic. Such a nozzle is inexpensive and is quite suitable for non-professionals.

Useful advice! Using a ballerina as a nozzle for a manual mechanism, efforts should be made in the implementation of centering and the first rotational movements of the incisors, outlining the contour of the future deepening. Uncertain movements can cause chips on the upper edge of the material.

Crown on wood: conditions for proper operation

In order for the tool to function properly, it must be properly operated. This means compliance with the norms and requirements of technical conditions, application in accordance with the purpose and compliance with the rules during operation:

a drill with a crown attachment cannot function continuously for a long time, as it heats up significantly. It is necessary either to equip the tool with an additional cooling system, or to take a 15-minute break after every 30-40 minutes of work;

It is necessary to choose drills for crowns with high power, convenient handle

manufacturers do not produce special crowns for drywall, wood cutters are used for drilling this material. The power of a power tool with a torque can be much lower than the optimal indicator for drilling, for example, beech;
when working with crowns, the method of connecting the shank to the cylinder should be taken into account. If flat soldering is used, it is necessary to avoid lateral loads on the device and be sure to take breaks in operation to prevent overheating and the appearance of defects at the junction. In the case when the shank is embedded in the landing part of the crown and soldered, an additional support appears – the collar, as a result of which the strength of the joint becomes much higher;
it is necessary to pay attention to the price of crowns on wood. It is impossible to intensively operate a nozzle purchased for 50-70 rubles and count on a long period of its full-fledged operation. For this type of tool, the price and resource are directly dependent.

With proper operation, the tool will last much longer

Any tool requires skillful use of it. When working with crowns-nozzles, it is not so much experience that is important, as awareness regarding the technical capabilities of the device and the intended use. The market offers circular saws for both amateur craftsmen and professionals. It is important to make a reasonable choice.