How to drill wood correctly Article. 4 Ways to Drill Round Holes in Wood

General tips for drilling wood

Wood is a relatively soft material that can be easily processed. Of course, there are hard varieties, and there are also exotic ones, which in their properties are not inferior to every metal, but still in Russia most often you have to work with fairly soft varieties. On the one hand, working with soft wood is easy, but on the other hand, you need to follow some rules.

Before starting work, it is worth applying markings, especially if several holes are needed. The center of the hole is marked with a regular pencil, after which many make a recess there with an awl or a nail. This is necessary so that the drill does not move to the side at the very beginning of work. If the drill has a centering sharp tip, then you can do without it.
If you have to work with a separate piece of wood, then it must be securely fastened. The ideal option is to use a vice; if you don’t have one, you can simply press it firmly against the wall. Working without fixing it would not be the best idea, since the hole may turn out to be of poor quality, and the wooden part itself may begin to rotate.
If you need to make a through hole, then you need to place a piece of wood under the wooden part, which will prevent damage to the surface on which the drilling takes place. Surprisingly, many people forget about this. By the way, this will also prevent the fibers from breaking on the bottom of the workpiece (where the exit hole will be).
For each type of drill (as well as diameter) there are recommendations for the maximum permissible speed. You definitely shouldn’t exceed them, and it’s even better to drill with a small margin, at slower speeds. What are the consequences of high revs? It's simple: chips and cracks. And if you need to make a large hole, then it would be correct to first use a drill of a smaller diameter, and then a larger one.
Always select drills that are suitable for your task, especially when large diameter holes are needed. And when using very large diameter crowns, they often use an additional blank with an already drilled through hole, which will not allow the drill to go to the side (it is placed on top and the existing and future holes are combined, like a stencil).
When drilling blind holes, the most important problem is depth. There are types of drills that have limiters in their design, but if they are not there, you can get by with marks that are attached to the drill. You don’t need to buy anything: rubber rings, adhesive tape or electrical tape will do.
Do not allow the accumulation of chips and especially sawdust, this reduces work productivity and is fraught with jamming of the drill. This is true even when using screw drills, which, in theory, should remove chips, but this does not always happen.

Follow these simple recommendations and you won’t have any difficulties drilling wood. This process requires only accuracy, slowness and the right approach.

Carburetor malfunction

If all the actions described above did not lead to success, perhaps the reason for the chainsaw’s inoperability lies in a malfunction of the carburetor.

In this case, it is checked and adjusted. However, if you do not have experience in performing such work, then you should find through friends or through an advertisement a specialist who knows how to do this. Otherwise, you risk being left without a saw. A carburetor is a device consisting of many very small parts, which, if disassembled improperly, can simply fall out and get lost.

A video on how to repair the carburetor of a Stihl MS 250 chainsaw is presented below (click triangle to play):

Drill bits for tiles and glass

It is extremely difficult to work with such materials - they are easily damaged. For example, ceramics and glass crack when the drill is misaligned or overheated. Therefore, only two types of drills are used for them: crowns and feathers. Crowns can have a diameter from 13 to 80 mm and, as a rule, are coated with diamond dust.

Feather drills. They are an ordinary metal rod with a sharp spear at the end (usually made of pobedit). They allow you to make holes with a diameter of 3 to 13 mm - ideal for dowels.

But keep in mind that after you have gone through the tiles, it is worth changing the drill. Otherwise, you will simply dull it on the concrete and get a crack in the tile the next time you use it.

Technological scheme of work

Correct operation of submersible pumping equipment is ensured by competent organization of the technological process of pumping diesel fuel. Necessary:

connect a hose of the appropriate diameter to the pump outlet using a clamp;
immerse the pump in a container with diesel fuel, and place the unused end of the hose into the tank where the pumping will take place;
connect the power supply from the battery terminals using a cord, not forgetting the polarity;
turn on the start button and start the pumping process.

After the required amount of diesel fuel has been transferred to the desired container, the pump must be turned off and make sure that there is no liquid inside the system.

What is a wood ballerina

A circular adjustable ballerina drill is a device that is designed for drilling round holes of large diameter. The tool has a simple design. It consists of a shank with a transverse rod on which movable carriages with cutters are attached. The rod has markings according to which you can set the required spread of the cutters relative to the center of the intended hole. A core drill is fixed in the middle of the shank. It serves as a centering element and support when drilling.

In addition to designs with two cutting elements located symmetrically, there are ballerinas with one cutter or even three. In the latter case, they are located on the base in the form of a disk with grooves.

Techniques for drilling holes in wood

Countersink hole for screw head

There are situations when you need to drill a “blind” hole for a tenon joint. To do this, you need to use a feather drill with a limiter, which is placed on the drill according to the size of the drilling depth

It is more difficult to make holes in large-diameter wood, since the use of conventional cylindrical drills chips the surface of the material, spoiling its appearance. To successfully cope with this task, feather drills and annular cutters are used.

Drilling with feather drills

For successful drilling with feather drills, secure the wood firmly in a vice and press the tip of the drill bit against the surface of the material. Then drill (at low speed) the hole until the tip of the drill appears at the bottom of the wood. Stop drilling and remove the feather bit from the hole, then turn the wood over, clamp it in a vice and drill the hole on the other side. This will prevent the block from splitting when drilling.

Drilling with an annular cutter

Wood annular cutter

An annular cutter is used for drilling holes in wood with a diameter greater than 38 mm. Drilling begins with a small-diameter guide drill, structurally connected to the cutter in one piece. This guide serves as a guide for the annular cutter.

Here are some tips from professionals that will surely help you when drilling holes in wood:

a) for vertical drilling, you can install a square parallel to the drill; b) if you often have to do carpentry work, purchase a special stand for the drill, which allows you to hold the tool strictly vertically and controls the depth of the holes; c) be sure to use a vice when drilling to avoid splitting the wood; d) to ensure that the exit hole does not have chips, place it under wooden part with an unnecessary block and drill them together. This is especially applicable when making holes in a thin board; e) if you do not have a drilling depth limiter, wrap the drill at the limit location with bright electrical tape or masking tape.

No. 7. Chain lubrication problems

For normal operation, the chain must be constantly lubricated to reduce friction between the bar and the links, and also to prevent premature wear of the links.

If the chain on the chainsaw is not lubricated, then there is a problem with the oil pump - oil is not supplied due to a clogged channel. Lack of lubrication is the reason why the chain stretches or why the chain breaks. Clean the channels; tiny particles of chips constantly get there and clog them. The oil hose may also break. If you need to adjust the chainsaw oil pump or repair it, it is better to contact a service center.
Oil splashes from the chain. Incorrectly selected lubricant - it is too liquid, so it does not so much lubricate the links as it splashes onto the wood. Replace the lubricant with a thicker one.

Tips for choosing

An instrument of any form has its own criteria and must meet them. You can determine the quality of the instrument you are purchasing by its appearance, color, and also by the material from which it is made.

Material. It is impossible to visually determine the quality of the material. Therefore, before purchasing, you need to make sure that the product has a quality certificate. Chinese counterfeits are often sold without documents.
Appearance. A high-quality product has a flat, smooth surface. Various cracks, scratches and damage are defective. The cutting area must be carefully sharpened. Long drills must be straight. It is very easy to check their quality; just roll them on a flat surface. All irregularities will be immediately visible.
Color. To ensure that the tool has additional strength, it is manufactured using a special technology. You can find out which processing method was used by the color of the product. The steel color indicates that no additional processing was carried out. The yellow-gold spraying relieves metallic stress. A product treated with titanium nitride (a tool with a bright gold color) will have a long service life. The black drill has increased strength. Steam was used to process it.
Package. Products from well-known manufacturers have good, high-quality packaging. All fakes are poorly packaged, and the text is sometimes written with errors.
Price. The higher the price, the better the quality of the product. All budget tools have a short service life.

Caring about their reputation, well-known stores will not sell counterfeits. And no matter what kind of tool you buy, in order for it to be of high quality and last a long time, you should contact reliable and trusted suppliers.

For high-quality performance of even such a simple procedure as drilling holes in wood products, the correct mode and the appropriate tool are required. When choosing a wood drill, you should take into account the characteristics of both the material being processed and the hole that needs to be made. The modern market offers a wide variety of drills designed for making holes in wood, so choosing a tool to solve certain technological problems will not be any particular problem.

Drilling holes for socket boxes with a core drill in wood

Main types

The main parameter, depending on which wood drills are divided into different types, is the design of the working part. Based on this feature, wood drilling tools may fall into one of the following categories.

Drills of this type are used to make holes of medium diameter in wood - up to 25 mm. It is advisable to use such a tool in cases where the requirements for the accuracy of geometric parameters, as well as for the quality of the holes, are not too strict. Among the most significant advantages of pen drills, low cost and ease of maintenance should be noted.

Feather drills are considered the most affordable

Core type tools are designed for drilling large diameter holes. In terms of their design, wood crowns resemble a metal glass with a shank, the working end of which has cutting teeth. When such a drill rotates, its cutting teeth, interacting with the workpiece, cut out a circle of the required diameter on its surface.

Set of wood crowns

Spiral wood drills are also called screw drills. Their working part resembles a screw. They are used for drilling small diameter holes in wood. Due to the special design of screw-type drills, chips are effectively removed from the processing area when used. The twist drill also ensures high precision and extremely high quality machining.

Spiral wood drill with scoring bits

These are tools with the help of which, in products made of wood, they create not through, but blind holes with a perfectly flat bottom. In addition, if you use such a wood drill with additional accessories, you can drill a square hole in a wooden product.

There are many modifications of the Forstner drill available.

With the help of such tools, it is possible not only to drill wood, but also to make grooves of various configurations in wood products. Drills of this type are most often used in cases where it is necessary to perform complex processing of wooden parts, and in order to drill a regular hole, a twist drill, a feather or a core tool is used.

Milling drills are designed for drilling a round hole and then boring it to the desired shape. Used when working with wood and thin metal

The shank of drills designed for woodworking is usually cylindrical, but manufacturers also produce them with shanks of other configurations. So, on the modern market you can buy drills for woodworking, the shanks of which can be:

triangular, optimally suited for fixation in a three-jaw chuck (tools with a triangular shank are ideally transmitted torque, and even very significant loads are not able to turn it in the chuck);
hexagonal (tools with such shanks can be installed in both a standard and a three-jaw chuck, but there is a very high risk of the drill turning when subjected to heavy loads);
conical (tools with shanks of this type are used primarily to equip production equipment);
tetrahedral (a rarely used form of shanks, which, however, ensures high stability of the tool against rotation in the chuck).

Piston fuel pumps

Electrical devices allow fuel to be pumped through a reciprocating motion. The water plunger pump is highly reliable due to the placement of the piston inside the sleeve of the device. The moving mechanism does not come into contact with the walls of the sleeve and does not wear out from friction.

The lightweight diaphragm fuel pump performs its operating functions by oscillating the plate under the action of the drive. An electrically driven vane pump has a rotor in its design, during operation of which pressure is created that presses the vanes to the inside of the housing. Compact electric pump with a power of 12-24 V, has high efficiency, reverse injection.

Dynamic devices for pumping out liquid media are divided into two groups, each of them has certain operating parameters and a method of fuel supply. When studying the design of devices, the following features should be highlighted:

Dangerous pumps operating on a centrifugal or axial type. In centrifugal devices, fuel injection is carried out by rotating mechanisms. The axial pump operates on the principle of a fan.
The friction pump is used in the chemical industry; the operating principle of the unit is based on the action of friction.
A vortex electrical device sucks and expels fuel from the system. The positive properties of the pump include the ability to transfer fuel under high pressure, ease of maintenance, and availability of spare parts.

Drills for concrete and blocks

Their main difference is the soldering of hard metals on the pointed surface of the drill: Pobedit or artificial diamond.

Drills for concrete are also different:

spiral - suitable for making shallow holes (up to 100 mm), they are the most popular;
drilling - similar to spiral, but usually with longer and wider grooves for dust to escape;
crown - used when it is necessary to make a recess or hole of large diameter in concrete for a socket or junction box.

The same drills are also suitable for blocks, but when working with soft materials it is not recommended to use the impact mode (usually it is not needed).

Unusual application of a car fuel pump

To pump flammable materials, pumping units of different power are used, the design of which is calculated in accordance with the viscosity readings of diesel fuel, gasoline, and technical oil.
A 12-volt gasoline pump can pump diesel fuel in a volume of 20-80 liters per minute. The consumer market offers pumps for pumping fuel from world brands with technical characteristics that allow fuel to be supplied at a horizontal distance of up to 30 meters and a height of up to 2 meters. The device for transferring diesel fuel from storage to the power unit can be self-priming and submersible.

Color matters

Even by the appearance of the drill, you can determine its properties and qualities.

The gray color indicates that this is an ordinary simple drill, without any additional processing.
Cherny reports that the drill has been treated with hot steam and has increased wear resistance.
Yellow means that the drill has been quenched and tempered (a procedure to relieve internal stress). Such products are even more wear-resistant, but are afraid of overheating.
A bright golden color is usually characteristic of drills treated with titanium nitride, which reduces contact friction in the drilling area and perfectly hardens the surface of the tool.

Tool functionality

A high-quality ballerina is made of high-strength steel, which makes it possible to use the device in working with soft and hard wood.

This tool has an adjustable drilling diameter. This allows you to make holes of almost any diameter. The limitation of the drilling range depends on the size of the ballerina. Manufacturers produce devices with the following cutter spread limits:

from 30 to 120 mm;
from 40 to 200 mm;
from 40 to 300 mm;
from 40 to 400 mm.

The maximum drilling diameter is limited by the rod on which the cutters are mounted. The minimum is the thickness of the shank.

A ballerina drill can be used in any places where using a jigsaw or a hand router would be inconvenient. For example, this may be assembled and installed furniture, in the part of which it is necessary to drill a neat hole, given the limited space. Another example is an uneven (concave or curved) surface. It’s unlikely that you’ll be able to do everything smoothly and neatly with a jigsaw or milling cutter. It will be difficult to control the inclination of the tool relative to the surface. A ballerina can easily cope with this task.

Engine malfunctions

The following defects are most often observed in engine operation:

the engine does not start at all;
starts, but immediately stalls;
does not develop the required power;
works unstable.

To find the cause of the problem, you need to analyze the possible causes in order by elimination. Let's go through this chain so that you know how to find a defect in a chainsaw if it appears.

Read also: How to seal a plastic cooling radiator

Areas of use and design features

As mentioned above, in order to drill a quality piece of wood, it is very important to choose the right drill bit. When making this choice, it is necessary to take into account both the characteristics of the material being processed (in particular, its hardness) and the type of hole that needs to be made. That is why it is very important for home craftsmen and specialists whose work involves processing wooden blanks to understand both the types and functionality of wood drills.

Twist (screw) drills

A twist or screw drill can be produced with two types of working tips: conical and with special scoring tips. If we compare both types according to the degree of their effectiveness, then it is almost at the same level. However, they differ in the load taken by the tool during wood processing. Thus, in the design of the working head of a drill with a scoring tool, there is a jumper, which causes significant loads to be transmitted to the entire body of the tool. Drills with a conical working head do not have this drawback, which, in addition, are much better centered on the surface of the workpiece. The conical head immediately enters the material, and the drill does not move to the side. Meanwhile, spiral drills with scoring tools, due to their design features, allow you to create holes in wood with higher precision.

Design of a twist drill for wood

Drilling wood using a spiral tool allows you to get precise and neat holes with straight edges and a smooth surface on the inner walls. Tools of this type can be used for drilling wood of any species and almost any hardness, as well as materials made on its basis (chipboard, MDF, plywood, etc.). If the drill is driven into the material being processed at a low speed, there will be no need to frequently remove the tool from the hole being created to remove accumulated chips.

No. 3. The engine "shoots"

If during operation there are extraneous sounds similar to gunshots, then there is a problem with the muffler or carburetor. How to make a chainsaw run quietly? It depends on which node is faulty.

Shoots the carburetor:

Ignition is too late - the air-fuel mixture does not have time to burn out in the cylinder, so the sound is similar to a small explosion.
Lean air-fuel mixture. Too little gasoline enters the mixture - the chainsaw, or rather the jets, needs to be adjusted to increase the fuel supply. Why the chainsaw revs on its own is for the same reason.

Shoots at the silencer:

Enriched air-fuel mixture. Why does a chainsaw “shoot”? There is too much gasoline and not enough air in the mixture, so the mixture does not completely burn out in the chamber and partially burns out in the muffler. Carbon deposits on the exhaust are a clear sign of this. The air filter needs to be cleaned or the carburetor adjusted.

How to choose and what to pay attention to

Choosing a high-quality circular drill is quite easy. The main thing is to know the main points that you should pay attention to first, but also not to lose sight of the little things.

The design is a very important point: a wood ballerina comes with one chisel or two or more. For frequent use, it is better to purchase an option with two or three cutting elements. It is easier to work with such devices and the quality of the processing performed will be at an acceptable level.

It would not be superfluous to be able to replace individual parts. Inexpensive circle drills can have a solid shank with a permanent center drill and rod.

Metal, its quality determines its strength and ability to withstand workloads. High-quality tools are made from high-strength steel or alloys. The shank and cutter holders are shaped using a machine tool. The rod is usually stamped and made of the same metal.

Cheap options often use soft metal or alloys, which can be brittle. Under load, parts may become deformed or break. Such a tool will not last long and it will also be difficult to achieve accuracy from it.

The quality of workmanship, the main feature is the absence of backlashes and distortions. All parts must fit together and be securely fastened with fixing screws.

The markings of a high-quality ballerina's barbell are stamped. Sometimes the divisions are highlighted with bright paint for better visibility.

Cutters and high-quality cutting elements are made from hardened tool steel. They are secured to the holders with rivets or soldering. Solid cutters with holders (made of the same metal) quickly become dull and are not durable.

Manufacturer, when choosing any tool and consumables, preference should be given to well-known and long-proven brands and brands. The most common are Topfix, Stayer, Irwin, Strum.

Purchasing an adjustable circular drill for use at home, or if you need to drill several holes, is completely worth it. This eliminates the need to purchase an expensive tool that may only be needed a few times.

No. 9. The chain does not rotate

Why doesn't the chainsaw chain rotate when the engine is running even at full speed?

Leading sprocket. Either it is jammed, or the crown is worn out so much that it does not engage and the chain does not spin on the chainsaw. In any case, it is necessary to disassemble the sprocket to find out the exact reason why the chain does not spin. If the crown is worn out, it is necessary to replace the sprocket (or the crown itself, if the sprocket has a prefabricated structure).
The chain brake is stuck. As a result, the sprocket is blocked by the brake mechanism, while the motor runs. It is necessary to turn off the engine and release the brake. If this happens under load, the brake mechanism will have to be changed, as well as the sprocket, because Due to the high temperature, many elements can melt and overheat.

Drill sharpening

Drill bits may become dull with frequent use. You can sharpen the tool yourself or contact a specialist. If you decide to do this yourself and do not have the skills, it is better to practice on an old instrument. When sharpening, the main thing is not to violate the desired geometry and adhere to a certain degree. Sharpening can be done manually or on an electric machine.

Metal analogues of drills are made of softer metal. They can be sharpened manually using a file.
Using an electric machine, the drill overheats greatly. This can be avoided by constantly dipping it in water. Or organize a stream of water pouring onto the tip of the drill.

No. 4. Chainsaw overheating

Why does the chainsaw get hot? The engine or tire may overheat - in any case, the fault is due to a small amount of lubricant.

Engine overheating. The proportion of the fuel mixture is incorrect or pure gasoline is poured. Drain the fuel and make a mixture using the correct proportions of oil and gasoline, as specified by the manufacturer.
Tire overheating. The oil pump needs to be cleaned or adjusted because... No oil is supplied to the tire.

How to drill a log or thick beam? Of course with a screw drill

We continue to understand the equipment with which you can work on wood. In general, wood can be drilled with different drills; in the last article we analyzed the effectiveness of the Forstner drill, and figured out how and where it is recommended to use it.

There are a great many types of wood drills and it often happens that they are ideal for some jobs, but not suitable for others at all. Therefore, a home craftsman must understand what and how to drill into wood. Today's article will be about a screw drill, also called a twist drill.

It is for wood and will help out in cases where it is necessary to drill a deep hole. For example, you have a log house through which you need to stretch a water pipe or a bundle of cables. And only a twist drill can cope with thick wood. Of course, nothing prevents you from trying to use a regular perk, however, as I already said, drilling with it is inconvenient and it is not a guarantee that you will be able to complete the job.

Here is a photo:

As you can see, the tip is made in the form of a thin thread, which helps to screw in the drill perfectly at the initial stage of drilling. The ejection of chips occurs due to the screw edges (like any drill or brace), so drilling is easy. The shank is most often 6-sided, so the tool is securely mounted in the chuck of a drill or screwdriver.

It is necessary to work with such a drill at low speeds, so it is best to use a regular home drill with speed control or a powerful screwdriver with a high tightening torque.

But it is best, if possible, to use a low-speed drill with a speed of up to 800 (I recommend a rebir drill).

The most common use of such equipment is the fastening of logs. Workers who assemble log houses often come to our store and they buy “spirals” with a diameter of 25-28-30 mm and a length of 450-600 mm. As you know, in order to fasten the logs of a log house together, you need to drill them from above and insert iron reinforcement into the hole made. It is very important that the hole is drilled deeply, which is why a long drill is needed.

The standard range of lengths is as follows:

— 220 mm — 450 mm — 600 mm (the most popular).

To make holes with a diameter of 30 mm to a depth of 600 mm in wood, you need a very powerful power tool, so we recommend using a drill of at least 1000 Watt (and that is unlikely to be enough), as well as screwdrivers with a torque of at least 36 Nm. Of course, the most preferable option is a low-speed drill, which has a power of 1200 Watts; for such work you can’t imagine anything better. It is very powerful and easily pushes such a thick drill bit through solid wood.

The prices for such “consumables” are quite high, at least it is much more expensive than feather and Forstner drills. For example, 22*600 costs around 300 rubles. And the thickest ones come with a price tag of a piece of rubles. They are taken only when it is necessary to drill a hole in a log house for a sewer pipe, etc.

However, if you consider that the drill is powerful and heavy, and it is used to perform specific work, then you should not worry about the price. Because anyway, nothing else can drill through 3 logs at once.

DIY fuel transfer pump

Today, many people have fuel storage containers. Diesel fuel can be useful at home and at work for completely different reasons, but one thing is for sure - sooner or later it will need to be removed from the container. The easiest way to do this is with a special pump. But due to limited budgets, such purchases may not be affordable for everyone. No problem! You can make a pump for pumping fuel with your own hands. And this doesn't require any complicated parts.

First of all, the installation must be based on the pump. In fact, any pump from the hydraulic system that is equipped with loaders, tractors, manipulators, etc. is suitable here. There are those who use the “Gazelle” pump from the interior heating, while others suggest using used pumps from injection foreign cars. In principle, the pump will work from any power steering truck.

A completely budget option is the NSh 32 U pump. Many people have these lying around in their garages, but the owners don’t know what to do with it. Therefore, look in your bins or ask your friends - perhaps you will find such a pump. The letter “U” present in its name signifies its universal character. The rotation of the shaft changes the position of the outlet and feed.

This pump has four mounting holes. Using bolts, secure the pump to the plate and to the board. Choose the electric motor at your discretion. By the way, the NSh 32 U pump has a vacuum mode, so it can draw liquid from a depth of up to 4 meters.

As you can see, the pumping installation is not as complicated as it might seem at first glance. But the problem is that you shouldn’t expect much efficiency from it. If you don’t want to wait a long time while the pump pumps fuel, then it’s better to buy a new one. Moreover, there are now inexpensive models. You can also buy a pump for pumping fuel in the RusTara store, contact us!

Source of the article: https://www.rustara.ru/articles/nasos-dlya-perekachki-topliva-svoimi-rukami/

The task is to drill a large hole in the tree. The solution is wood crowns.

I welcome all visitors to my website, where I talk about various types of tools, 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.

Minuses:

The cut is not clean, unlike the holes drilled with a forstner drill.
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.

All in all, a hole saw is a must-have tool for the 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 a jigsaw, using a thin file for a figured cut. 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.

Metal drills

Externally, these drills are the simplest, without carbide tips. Although there are also specialized ones. The list is something like this:

spiral - an analogue of a concrete drill, only made of HSS, P18 or P6M5 steel;
conical - they are made in the form of a cone, they can be used for drilling large-diameter holes without reinstalling the drill;
crown - needed for holes larger than 30 mm, made of hard alloys and HSS steel, and can also be diamond-coated;
stepped - the tool is a cone with steps of cutting edges of different diameters. With just one such drill, you can make holes of different diameters.

How to make large holes in walls? Choosing the optimal tool

Drilling large holes requires large nozzles, and they are different for wood and concrete. We will tell you which attachments to use for which tasks and recommend reliable drills.

To drill holes for air conditioner mounts, cable pulling, installation of a soldered pipe for water supply or connecting furniture structures, you will need a large drill. Although large nozzles for wood and concrete are somewhat similar, they are still intended for different tasks and they are not interchangeable. We will tell you about them and recommend a couple of good attachments for wood and concrete. We have already told you how to distinguish drills for wood, metal and concrete. Here we will focus on large attachments, which we do not use very often, but without which we can’t go anywhere in everyday life.

Types of products and their features

Let's look at what options you can find in our retail network and how they differ from each other.

Feather drills

The most common and budget option, which is quite convenient for even inexperienced craftsmen to work with. And you can also master this simple process with your own hands.

Let's look at the main advantages of this solution:

The diameter range varies from 10 to 60 mm.
The work is done quite quickly, but the quality of the hole is low, and it is unlikely to achieve an ideal result.
The maximum drilling depth is approximately 150 mm.
Products are sold either in sets of 5-6 pieces or individually, so you decide which option is right for you.
If necessary, you can buy an extension that clamps the drill and increases its length by 300 mm.

Large sizes are usually sold individually, small sizes are usually sold in sets.

It is impossible not to mention such an interesting option as an adjustable pen drill; this type of product can make holes with a diameter of 22 to 76 mm. The work is carried out at low speeds using fairly powerful power tools.

Adjustable nib – a new word in products of this type

Forstner drill

This product option is used very widely in furniture production due to a number of undoubted advantages:

The edges of the hole are perfectly smooth, which is not possible with other options.
High reliability and long service life allow such devices to be used for years.

Purpose of pumping equipment

A compact pump for pumping fuel with your own hands can be made from any hydraulic system: from a loader, manipulator or tractor. The device can be used in various areas of the national economy:

A productive device for transporting diesel fuel with a power of 12 volts is used when refueling boats, motor boats, and private flying club aircraft. The most popular are portable devices from well-known companies: Adam Pumps, Petroll, Piusi, Gespasa. Fuel units for fuel transfer have been tested in different climatic zones of the Russian Federation, high efficiency indicators are formed by protection class 1 and an automatic ventilation engine.