Help on Tele2, tariffs, questions

Greetings to all visitors to my site, where I talk about various types tool, I give advice and recommendations on choosing and working with one or another tool. Today we will look at a tool with which you can easily drill a large-diameter hole in thin wood, most often plywood, fiberboard and chipboard.

The tool is a hole saw for wood, most often sold in sets with different saw diameters. This is very convenient - I bought one such set and you can drill holes of any large diameter, of course, if the saws that come in the set are of the diameter you need. Photo of this set:

For use at home, the Stayer set is quite suitable; it is optimal in terms of price and quality, moderately expensive, and comes with many saws of various diameters. It is worth noting that there are several variations of diameters, there are more complete sets with a large number of crowns, the diameters start from the smallest to the very large.

The most popular and best-selling set is 19-127 mm, this set contains 12 hole saws for wood of various diameters, it can be said to be universal, since it is almost always possible to select a crown for the desired diameter. However, its cost is 480 rubles. If you take sets with fewer attachments, then it will cost less.

So, let's look at the pros and cons of such a tool.

First the pros))

• Versatility - the ability to choose a crown for almost any diameter.
• Convenient suitcase, everything is stored in one place.
• Quick drilling of fiberboard, chipboard, plywood.

• The cut is unclean, unlike the holes drilled.
• Sometimes it is not possible to choose the right diameter, for example, for some spotlights.
• Drilling depth is only 30 mm. Of course, you can drill deeper, but you will have to knock out the wood every time when the crown rests on the tree, because it is not deep.

In general, a hole saw is the right tool for home. For example, I recently pulled a 110 mm pipe through a thin partition (double layer of chipboard with a 50 mm block between them). How to drill 110mm holes in plywood?

There are several options - you can use it for curved cutting. It is quite possible to drill a round hole, but you still won’t get a perfect circle.

But take a set of circular saws, choose the diameter of the bit closest to 110 mm, assemble it and drill a smooth, beautiful hole in a few minutes.

Cutting a round hole in any material has never been a problem - especially today, when craftsmen have such a device as a hole saw. In almost all cases, this is an attachment for a drill or hammer drill, which allows you to cope with almost any type of material. It is with this instrument that we will get acquainted in this article; we will study the varieties of this type of instrument, understand its purpose and features, and also take a short excursion into the area of ​​its practical application.

Hole saw: wood and drywall no problem

Yes, yes, for drywall and wood, a hole saw of the same type is used - in appearance it resembles a thin-walled tube, at the end of which there are teeth standard for a hacksaw. The hole saw for wood or plasterboard is produced in two versions - in both cases these are kits that allow you to cut holes with a diameter of 20 to 60 mm.

Both types of these saws have some operational differences. The first option, as a rule, is made of relatively thick steel and lasts much longer than the second option of the drywall hole saw, which has a slot along its entire length. The second option is disposable devices that are designed to work at one site.

Both crowns for drywall or wood are quite easy to use. They are installed on a drill or screwdriver and essentially work like an ordinary drill. Their design has one small nuance– the diameters of the saws are deliberately made smaller than, for example, the mounting diameter of a socket box for drywall. This is done so that the socket box fits tightly into the hole and does not wobble in it. On the other hand, if such a socket box has to be mounted in wooden wall(lining or OSB), then the hole obtained using a hole saw has to be additionally modified electric jigsaw. This point should be taken into account - perhaps cutting out a hole in the tree with a jigsaw will look much more attractive.

Hole saw set: cutting a round hole in metal

By and large, a hole saw for metal is not much different from a similar tool for wood or drywall - the main difference between them is the steel from which it is made and the shape of the tooth. You understand that metal is a strong thing, and in order to cut through it, the steel of the saw should not be inferior to it in strength. This is usually high speed steel. As for the tooth, it is small and has a special sharpening. In all other respects (in terms of appearance and design), it is still the same bit, or rather a set of bits installed on a special device, which, in turn, is installed in the chuck of a drill or screwdriver.

Almost all metal crowns have several specific aspects in their work. First, they are not designed for drilling through thick metal - as a rule, they are designed to work with thin sheet materials like galvanized steel or products made from it like metal tiles, metal siding or profiled decking. Secondly, cutting holes with such crowns should not be done at high speeds - high speed rotation of a drill or screwdriver simply burns the saw and it goes to waste. In turn, a low rotation speed is also not good - no one needs a long drilling process. This means that you need to choose average drilling modes - including feed, or rather the force that the master will apply to the tool during work.

Drill bit for concrete: features of the tool

In some ways, a concrete drill bit for a hammer drill can hardly be called a hole saw, since there is very little in common between them - except perhaps a tubular structure with a drill in the center. Instead of cutting teeth standard for a saw, such a crown is equipped with carbide pobedit tips, which are able to withstand both friction and the impact created by a hammer drill. There is no need to talk about sets here, since for different hole diameters you have to purchase a separate tool of this type.

A bit for drilling holes in concrete, despite its power and ability to crush concrete walls, is not able to withstand reinforcement. When it hits the reinforcement, which happens almost every time during the drilling process, its soldering tips fly off and, by and large, the expensive tool becomes hopelessly damaged. I don’t want to say that this is a completely useless tool - you just need to understand that in the process of work, when you get to the reinforcement, the crown should be removed and instead, a regular pick should be installed on the hammer drill, with which you can complete the job you started. Subsequently, the reinforcement can either be bent with a hammer or cut with a grinder.

Compound hole saw: diamond version

A diamond hole saw could be called universal if it really could handle all kinds of materials. But this is not true - it is intended exclusively for cutting steel and concrete. Wood, drywall and many others soft materials clog the edges of the diamonds, as a result of which they lose their ability to cut even metal and concrete - a paradox, but the same thing happens when using diamond bits to cut holes in asbestos, slate and aerated concrete. Diamond crowns They are sold in stores in sets - exactly the same as hole saws for wood and drywall. That is, a large washer with a drill in the middle (the drill in such bits is tipped) and about seven or eight interchangeable hole saws.

The diamond hole saw also has some special features in operation.

First of all, these are the same average speeds - a high rotation speed of the hole saw leads to rapid wear of the diamond edge. To be more precise, it is better to cut with such bits at low speeds.

The second point concerns working with concrete. Diamond does its job better if the surface being cut is moistened with water. For metal this point is not relevant.

Often, diamond-cut crowns are used to drill holes in ceramic tiles - by and large, this is the only normal tool, through which you can make neat round holes in the tiles. When working with this material, it is necessary to take into account its fragility - to prevent the tile from splitting, it is necessary to drill it from both sides. First from the front side, and then, when the enamel is sawn through, you need to move to the wrong side.

By and large, cutting each material with a diamond hole saw has its own subtleties and nuances. For example, if we talk about concrete, or rather reinforced concrete, here we can note the following point: with proper cutting, the reinforcement of such structures is not a problem for the saw. It goes through it easily if you increase the speed a little and stop using water during the drilling process. Once the reinforcement has been passed, water can be added again to the work process.

And to conclude the topic of what a hole saw is, there is only one thing left to add - endlessly deep hole You won't be able to drill with this tool. As a rule, the drilling depth is limited by the length of the bit, which is the disadvantage of this tool - it is not designed for equipment through holes in the walls. If you need to break through a thick wall, then it is better to turn your attention towards a tubular drill.

Creating a round hole has, in principle, never been a problem. Today this work can be called easy, because craftsmen can use a device such as a hole saw. In almost all cases, such a saw is actually an attachment for a drill or hammer drill. It can handle almost any material. In this article we will get acquainted with different types this tool, consider its purpose and features.

Hole saw for wood

A hole saw is a type of saw that can be used to create round holes in wood, concrete, and other materials. A hole saw is a flat saw bent into a circle or metal cylinder. On the cutting edge of this tool there are teeth or diamond coating, or a drill that has two brackets on which two knives are mounted. The saw rotates electrically, most often using a drill.

The depth of the hole that can be created at one time is limited by the height of the crown. When the maximum depth is reached, the cutting material needs to be removed from the crown bowl, this can be done using a spring. Next, the hole can be deepened as much as the length of the spindle that rotates the crown is sufficient.

Due to the significant contact area between the saw and the material and, as a result, high level friction, during sawing it is formed a large number of heat. For this reason, very often the use of a hole saw is carried out using the wet drilling method.

Varieties

Hole saws are often used for cutting dense materials. For example, a bimetallic hole saw can easily cope with drilling not only wood or drywall, but also non-ferrous metals and even steel blanks. This saw is made of hardened high-speed steel High Quality and flexible carbon steel.

A hole saw with a carbide tip is used for cutting round holes in tiles, stones, cement boards and others. similar materials. This saw is often used when installing tiles around faucets and pipes.

Carbide-tipped hole saws, such as Bahco Carbide (CT), are used to create clean, precise holes in difficult-to-cut and abrasive materials. It is suitable for working with foam concrete, brick, ceramic tiles, laminate, plywood, reinforced plastic, composites and other abrasive non-metallic materials.

The hole saw for wood is intended for use as an attachment for a hand or electric drill. It allows you to create a hole with a diameter of 60 to 95 mm in wood, chipboard, and fiberboard without special preparation. This saw is made of hardened steel. Has side slots for quick removal of sawdust.

Sets

Most often, hole saws are sold in sets. The set includes saws of various diameters. This set is very useful - I bought one set and you can drill holes of any diameter. In stores you can find sets of various configurations, with different numbers of saws.

The most popular is a set that contains saws from 19 to 127 mm. These sets contain 12 wood hole saws of various diameters. It can be called universal, because for almost all jobs it is possible to select a crown of the required diameter. A similar set costs around 500 rubles. The more attachments in a set, the correspondingly higher its cost.

The carbide tip hole saw is used for cutting round holes in tile, stone, cement slab etc., and is necessary when laying tiles around water taps and pipes, as well as for cutting tiles laid around the corners of the sink. This tool cuts both soft and hard tiles, although cutting glazed tiles is quite slow.

The hole saw is secured in an electric drill using a chuck, into which a 6 mm diameter center drill with a carbide tip is also inserted. You can saw dry, but if you drill a hole in a separate, unsecured tile, it breaks easily. The reason is that the hole saw cuts rather slowly and causes the tile chips and dust to heat up and collect around the hole being cut. (Thermal shock is not a problem with other saws. When cutting electric tile cutter the disk is cooled by water, and diamond blade for dry cutting, it has no teeth and cuts quickly enough, which avoids heating the dust, so that the tile does not have time to heat up too much).

To prevent the tile from overheating during drilling, it is dipped in a container of water.. Water washes away heated dust and debris and cools the tile, protecting it from damage; Using water also extends the life of cutting tools.

Unfortunately, immediate proximity to water and electricity can be dangerous. Battery-powered tools do not pose the same dangers as electric tools, powered from the mains, but in most cases do not have enough power and rotation speed necessary to obtain even, smooth cuts on tiles or stones. (If you choose to use a battery-powered drill, be sure that the power source, consisting of batteries, will quickly discharge, since drilling holes requires a lot of electricity).

The solution to the problem is to connect your power tools, which you constantly use, to protective device shutdown (RCD), which automatically disconnects tools from the power supply in the event of a leak. You can plug into an existing grounded outlet or buy or rent portable version RCD.

To hold the tiles while cutting, make a plywood box slightly larger than more tiles and isolate the corners. It is better to fill the box with water so that the tiles are covered with a layer of water of about 5-6 mm. Before immersing the tile, lightly tap the center of the tile with a punch to create a puncture in the enamel and prevent the center drill from slipping. Then press the tile into place with the drill bit in the center and turn the drill on at normal speed. As soon as the drill passes through the tile, the hole saw is lowered onto the surface of the tile and then the drill speed should be reduced.

While cutting, try not to press too hard on the saw, as this may cause the tiles to crack. .Allow the hole saw to guide itself into the tile. Since the hole saw is best cut at speeds ranging from 100 to 200 rpm, it is a relatively safe tool. However, it can cut skin and bone, so it should be handled with care.

1. Design features
2. Preparing for work
3. Models
4. DeWalt
5. Bosch

To form large diameter holes, the ring cutting method is used. For work, a hand-held power tool, a ring attachment for a drill, is used. One of the types of ring drills is a wood crown.

Scope of use, main characteristics

Wood crowns are designed for cutting through holes, most often used to provide a seat for a socket box. With their help, using a nozzle with a certain coating, they process wood,, , concrete, plastic, metal.

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

Core drills up to 65 mm wide are equipped with a shank with a diameter of 19 mm. Samples bigger size- fastener with a diameter of 32 mm. The number of toothed segments on the ring depends on the size of the drill bit. On average, hole saws have between 2 and 16 teeth.

Hole drills are also used to create a clean cut with a smooth surface. inner surface groove. After work, there is no need to modify the workpiece or remove burrs, since they do not form. Before cutting holes, there is no need to pre-center or drill out the surface to be processed. As a result, work time is reduced and quality increases. It is possible to drill holes without dust or noise. The core cutter ensures comfortable work.

Design features

Regardless of what material the crown is intended to process, it includes several required elements.

Consists of a cutting head, a shank and a pilot drill with a pointed end. The kit also includes a hexagon with which the drill is clamped in the chuck. The cutting head is made in the form of a solid cylindrical edge with sharp teeth or as collapsible design

with a round seat into which a cutting ring of the required diameter is inserted.

Stacked rings allow you to make grooves of a certain size and change attachments. Each core cutter has characteristic slots or holes: through them the chips are ejected and the wooden plug is removed. On large diameter samples technological holes located on top, on smaller models - on the side.

At self-production crown attachment is used metal pipe required diameter.

Preparing for work

The technological hole on the cup has irregular shape, which prevents the nozzle from turning in the socket. It is recommended to tighten tightly clamping nut so that when drilling grooves in wood with a high load, the ring bit does not become loose.

After the centering drill and cutting attachment are tightly fixed in their seats, the chuck is installed in a hand-held power tool and drilling begins. The hole is cut strictly perpendicular.

Before working on the drill, set the speed. Every additional millimeter to the groove diameter increases the vibration of the tool. Therefore, you should choose drills with high power and a comfortable handle.

For wood, 300 rpm is enough; for hardwoods, it is better to set the regulator of a drill or hammer drill at 500 rpm. Sharpening of crowns is carried out in workshops or at home.

Models

Review of some drills.

Bison

The Zubr company produces wood crowns with centering drills made of high-tech tool steel. The centering drill provides increased rigidity when working with soft and hard wood. Crowns are installed on a regular household drill, suitable for working with wood, plastic, plywood, chipboard, MDF, plasterboard.

DeWalt

Crowns are used to form grooves and holes when performing electrical installations and laying communication lines. Bimetallic products do not dull for a long time, even in contact with nails, fittings, and are durable.

Bosch

The crowns are durable, do not overheat, do not deform during the sawing process, and can withstand a large number of drilling cycles without re-sharpening.

The table shows the sizes and prices of various types of crowns.