Hand drill for poles: making it yourself. Hand auger for the earth: choose or make it yourself How to make a garden auger with your own hands

Sometimes during excavation work it is necessary to dig holes that are needed to install piles, pillars and various types supports Often this needs to be done in hard soils, and in this case working with a shovel is too long and difficult, especially if the wells are required to be deep and in large numbers.

In this situation, you can use a drill for excavation work, and you can completely do without calling specialists and do everything yourself. If you wish, you can make a garden drill with your own hands. Drawings of this tool are available, some of them are very easy to use in practice. But first you need to understand the design and types of this device in order to have an idea of what kind of mechanism it is and what type of drill is more suitable for individual work.

An earth drill is a construction tool whose main task is to dig holes to the depth of the required foundation. The principle of operation is similar to a bottle opener - first the tool is screwed into the ground to the required depth, and then pulled back to the surface along with the ground , carried along by the drill blades. As a result of this operation, a hole with regular round edges is formed, suitable for installing pillars and supports. The most popular and frequently used types of drill include:

There is also a classification by engine type: gasoline and electric. The advantage of drills with engines is that what they have high speed drilling, require less physical activity, and it is possible to change attachments. Motorized tools are available in two options:

Manual. This type is more compact, but less powerful and has more weight.
Wheeled. Larger in size compared to a manual one, but this tool is more powerful.

The gasoline drill should be warmed up before idling. This is not required for an electric motor. The disadvantage of any motorized tool is that they require a source of electricity or fuel to operate them.

Types of drills not used in gardening

The impact drill is used exclusively in the construction and drilling of deep wells. Presented in the form of a pipe secured by rafters. With the help of an impact mechanism, the pipe is set in motion, pierces the ground deep and loosens the soil.

Crown mechanism, which is a pipe with a toothed crown attached to the base. Requires auxiliary equipment, so it is not used in amateur earthworks.

DIY making

If necessary, this tool can be made independently if you have some required tools . For work you will need a grinder, welding machine, plumbing kit, electric drill and grinding wheel. The most important thing in making a homemade drill is to make a fairly comfortable handle and good blades, which can be based on circular saw blades.

Homemade disc drill

This design is the simplest self-production and requires a minimum amount of materials.

For work you will need:

Metal reinforcement for a rod with a length of 1.5 meters.
A piece of pipe for the handle.
Circular disk for blade.
A thick drill that will act as a tip.

Having selected the desired diameter of the disk, it should be cut in half, and it is advisable to grind off the existing teeth to avoid cuts during work. The handle is welded to the top of the rod, as a result of which the structure takes on a T-shaped appearance. A drill is welded to the opposite part of the rod in the center, and blades are welded at some distance from it. It is important to maintain an angle of inclination between the blades of 25 degrees.

You can make a disk drill with replaceable blades, for which, instead of the blades themselves, you need to weld metal landing pads at the same angle and come up with a way to fix the discs. Bolt-on mounting is ideal, for which a hole is drilled in the platform to the size of the required bolt and the required thread is cut.

This modification allows you to select the required diameter of the working disks as work progresses.

Auger tool

The design of the auger is more complicated to manufacture and use, but with its help it is easier to dig holes of narrow diameter. To make it you will need the same materials as for a disk drill, but instead of a cutting wheel, for a circular saw it is better to take several ordinary round metal disks of equal thickness and diameter.

First, the rod, handle and drill are welded together as was described above in the manufacture of a disk drill. Then you should make an auger from the existing disks.

To do this, drill a hole in the center of each of the available disks with a diameter equal to the diameter of the rod. After this, a small sector is cut out of part of each disk, and the disks are welded in such a way as to form a spiral-shaped structure.

The rod is installed inside the resulting spiral, which is then stretched along the rod. Once the required shape and height of the auger is obtained, it is welded to the rod, starting with the upper and lower disks.

Rotary drill from a shovel

To work with soft, loose soils, you can make a garden auger from a shovel. To do this, cut lines are marked on the blade of the shovel according to the existing drawing, then the canvas is cut according to the markings with a grinder, and the resulting edges are bent in different directions. Moreover, the ends of the canvas bend slightly upward.

The resulting structure is light in weight and small in size, resembles a whirlpool, and is ideal for planting plants on a plot of land.

Rules of care during operation

Regardless of whether the drill is mechanical or manual, whether it is purchased or homemade, this tool requires mandatory maintenance. This allows you to extend its service life and prevent possible breakdowns during operation:

A hand drill is an indispensable tool when carrying out construction on a land plot. With its help you can drill holes for the foundation of gazebos, support pillars for the fence. In addition, the drill will also make it easier to replant shrubs and trees, which will make the gardener’s work easier.

This tool does not require special skills to use, and its use does not cause difficulties. The design is not very complicated, which allows you to make a drill with your own hands if you have a welding machine, grinder and drill. Self-created The tool will save money and ultimately provide exactly the mechanism required for individual work.

Every dacha owner at least once in his life had to dig a hole on his territory for the purpose of building some kind of object. This could be an arch, a support, a pillar, any element of the exterior or a full-fledged building, for example. Often, the construction of such things requires wells or holes, which are not always easy to make due to their inconvenient location. Also, work can be complicated due to difficult soils. IN similar situations the usual shovel remains not the most convenient tool to dig a deep hole, and therefore private owners often have to hire a specialist with a drill.

A garden hand auger has been and remains one of the most useful devices for garden owners. The tool is distinguished by its compact dimensions and low weight, which makes it very convenient to use and transport. Crafted from hard metals with your own hands, the post auger is capable of going through plant roots and small rocks in the ground. The drilling process is carried out due to rotational movements at the desired point.

Design

The main purpose of the drill is to dig wells to a depth approximately equal to the laying depth columnar foundation. Cutting through the soil is carried out due to the cutting part, which in turn can be performed:

Half discs;
In the form of screws;
Solid or removable;
Multi-tiered;
Two-blade;
Helical.

Some hand drills have small blades at the bottom with a gradually increasing radius towards the top. Nevertheless, often factory products turn out to be unusable in practice, due to a discrepancy between the diameter and the diameter of the new hole or due to the impossibility of penetration to the required depth. And although the cost of a factory model is small, it makes sense to learn how to make a drill with your own hands. Technology self-assembly It is cheap and simple, the main thing is to accurately determine the configuration of the future instrument! To do this, it is necessary to distinguish between the designs and functionality of the models:

Shaper plow . Covers the lower extended area of the socket. In most cases, the tool is used to strengthen columnar foundations during the construction of large structures.

The handle with the screw part is fixed due to bolted connection. The total length of the finished drill is usually a little more than one meter. This allows you to easily make holes up to 700 millimeters deep. If it is necessary to make a hole of greater depth, the structure is supplemented with a special connecting tube half a meter long. The complementary element resembles a part with a nut and bolt at the end sections of the pipe.

Ground receiver . The soil is accumulated in a special storage facility. The drill is in most cases used when drilling holes from 35 centimeters in diameter.
Baking powder . The tool is made in the form of a screw or two inclined blades. In the first case, a knife in the form of a spiral is placed on a bar.

DIY drill

If you want to make a manual pole drill yourself, as a rule, there are no difficulties during the assembly process. However, the work will require the following materials, parts and tools.

Materials

To ensure the product has the required level of strength, as well as to be able to perform work in hard ground conditions, it is worth using iron pipes with wall thickness not less than 3.5 millimeters. You can make cutting discs either with your own hands or take them ready-made from a circular saw. In the first case, it is recommended to take metal sheets with a thickness of 3 millimeters.

Details

Parts you will need:

3 pipes: one 400 mm long, two 500 mm long. The outer diameter of the pipes should be 40 mm, the wall thickness should be at least 3.5 mm;
M20 nut and bolt;
Drill with a diameter of 20 millimeters with a tip;
A pair of disks of 150 and 100 mm in diameter.

Tools

For cutting elements, a sharpening wheel;
Grinder and hammer;
Electric drill paired with metal drills;
Welding machine;
Locksmith kit.

If you do not have a drill tip, you can replace it with a regular drill bit with a tapered shank. In this case, the diameter of the element must fit the screw part. To avoid injury when making your own, it is recommended to use soft bicycle handles.

Work order

First of all, the center and radius of the circle, which will act as the future blade, is marked on a piece of metal. The intended workpiece is cut out using a grinder. After this, cutting and cutting lines corresponding to the size of the collar circumference are drawn along the diameter line. The finished disk is divided into two parts. The holes for the collars are made with a grinder;
Using a grinder, four 3-4 cm longitudinal cuts are made at the end of the pipe blank intended for making the wrench. Using a hammer, the notches are collected in the center, thus forming the tip of the pipe. To avoid filling the inside with soil the tip is processed by welding;
The halves of the disk with the knob are welded so that the angle to the plane of rotation is about 20 degrees, and the distance between them remains at least 5 centimeters;
The extension pipe is welded like the letter “T”, strictly perpendicular, it is strengthened by a metal “kerchief”. The workpiece is placed inside the collar pipe, after which a through hole is made, which will allow the elements to be fixed with wings and a pin;

It is worth making several holes in the extension of the hand drill at once - thanks to them, in the future it will be possible to change the length of the driver without any problems.

Finally, all that remains is to sharpen the blades. In this case, the cutting edge of the cutters is processed in such a way that when rotating, the tip “looks” down!

How to apply a protective layer?

The hand drill for pillars is ready, but it will not last long if it is not treated with a special protective compound that will protect the tool from harmful corrosion processes! For this purpose, all surfaces are thoroughly cleaned with sandpaper, and then treated with phosphating solution and primer. At the end the drill can be painted, but this is optional.

During the excavation process, namely upon completion, the drill should be disassembled and the bolted joints should be cleaned of dust and dirt, processing them waterproof lubricant. Such prevention will ensure long-term operation of the tool, eliminating sudden jamming of bolted joints.

How to increase tool productivity?

During construction work, namely when making wells, builders are often faced with a large amount of vegetation inside the soil. You can make working with a drill easier by sharply sharpened knife edges. In addition, you can also round the cutting area and cut teeth on the sloping part of each blade, which will significantly improve the ease of use of the tool.

Hand Drill Upgrade

The first improvement can be called performing a drill paired with replaceable cutters. This solution will allow you to dig holes of any diameter. In addition to spare parts, it is also important to carefully consider the method of fixing the cutters to the driver! The most simple option a connection is considered to be made by a pair of welded metal plates.

Important point! Welding should be done at an angle of 20 degrees relative to the plane of rotation.

A pair of holes are drilled into the mounting plates and blades for bolts. The cutters are secured using nuts, washers and M6 bolts. To prevent the bolts from causing additional interference during the drilling process, they are placed with the thread facing up.

Second improvement useful for builders working in areas with deep compacted soils. Thanks to a small flat cutter welded between the cutter and the lance, the hand drill will additionally perform centering and loosening of the soil while drilling. To complete this element with your own hands, you will need a pair of plates measuring 3 by 8 centimeters. In addition to the above, her presence can speed up the work process.

Third improvement method – increasing the functionality of the lower end of the gate. This happens due to a lance: a plate measuring 2 by 10 cm is cut out of a narrow sheet of metal and sharpened with a conical tip using a grinder. A machined plate is inserted into the end of the knob, which is then welded and flattened.

However, there is another way to create a pike. A longer plate is cut out of sheet metal - about 17 centimeters in length. The workpiece is heated and, like a corkscrew, is rolled into a screw. Further work is carried out similarly to the first option.

A drill of the required diameter that can handle metal and wood will work as an auger. Such a drill will easily pass through layers of soil, easily reaching the required depth.

Fourth – you can also make friezes with your own hands from grinder discs, just not ordinary ones, but those designed for working with stone! The central hole is expanded to fit the dimensions of the knob, the circles are cut along the radius line. The ends of the disk are moved in different directions, resulting in something like a screw. At the end, all that remains is to weld the part to the drill.

A circular saw blade is also suitable for creating a cutter. Its sharp teeth can easily pass through any vegetation and roots in the thickness of the soil. Which option suits you best?.. It’s not difficult to create a hand drill for poles with your own hands, and it will take a little money. All work will take approximately several hours.

Almost every construction begins with excavation work, since all buildings and structures are installed on the ground, and most foundations are buried to a certain depth. Excavation work can be carried out various techniques, motor and electrical attachments, as well as good old hand tools.

The most common hand tools are the shovel and the hand auger. The more carefully they will be done earthworks, the smaller the amount of materials will be used for concreting and other work on arranging the foundation. Achieving accuracy and economy with a shovel can sometimes be very difficult, especially when a hole in the ground is needed small size. It is replaced by a manual earth drill.

Construction and advantages of a pit drill

A hole drill, as the name suggests, is designed to drill various holes in the ground. The use of such holes can be very diverse, even for sewerage, for water, or for digging posts for any fence. Suitable for drilling holes as in vertical plane, horizontal and at any angle you need.

The diameter of the initial hole is limited by the size of the drill itself; the depth can be almost unlimited, as long as you have enough strength to drill into the ground. The design of such a device is very simple; the hole drill consists of only a small number of components.

Assembly diagram for a homemade drill

So, what does such a simple and very useful hand tool:

The basis of the design is the cutting part, or simply the drill. It is with its help that the hole drill cuts into the ground and makes the necessary hole.
Main support pipe. All structural elements are attached to it, and it allows you to go deeper to the length that it itself has.
Handle for wrapping. It is fixed on the top part and with its help we can, by applying a certain force, screw the drill screw deep into the earthen soil.

Each of the presented elements can be additionally equipped with various auxiliary elements and other modifications. Typically, manufacturers try to supplement their products with something that competitors do not have in order to lure consumers.

The main advantages of such a device are that the hole in the ground is very neat and precise, in accordance with what you need. Also, due to the fact that the diameter of the hole is limited, you do not do unnecessary work and do not dig up excess soil.

Thanks to this, it turns out that you will not need to spend an excessive amount of materials on concreting the pillars for your fence. In addition, thanks to its simple design, you can easily make an earth drill with your own hands.

What to prepare

In order to assemble the presented drill with your own hands, you will need very few materials. The main and most complex of them are drill blades. You will have to buy them or cut them very precisely from thick metal, and then sharpen the edge, giving it a fairly sharp edge for better cutting into the ground. For the base and handle, you can choose any suitable pipe.

Homemade drill with replaceable attachments of various diameters

The only condition is that the pipe walls are thick enough so that it does not break or deform during operation. For tools you may need a grinder or electric jigsaw with a metal blade, a welding machine and a drill.

Assembly steps

To assemble it yourself, you will need either a welding machine, or bolts and nuts and a drill to drill holes for them. It is better, of course, to use both welding and bolts. We will consider the DIY assembly process using the example of a drawing of a pit drill with a removable purchased working part and a non-removable frame.

So how does it go:

We start by welding the main pipe with the handle. We cut a hole in the handle with a diameter equal to the diameter of the main pipe and put it on the base. Then we make a weld along the contour. It is better to make a through hole, this way it will be possible to make a weld on both sides, which will give greater strength.
We weld the plates to the cutting elements at such an angle that it is possible to screw them into the main pipe.
Drill two through holes on the plates and in the pipe itself.
Having attached the cutting plates, we tightly screw the entire structure with bolts, securing the main nut with an additional lock nut.

At this point, the entire process of making a drill with your own hands is completed and the hole drill can be used. If you want to make it more presentable and attractive appearance, you can additionally coat the entire surface with metal paint.

If you want to make the cutting part yourself, you will need quite a lot of time, since sharpening and cutting a perfect circle requires a lot of time and precision work.

Why are different blades needed?

Since the diameter of the hole that the tool can drill is limited by the size of the blades, it is best to prepare several different options with different diameters. Then you will have the opportunity to choose the most optimal drill diameter for each individual case when you need to drill a hole.

For home use, it will be enough to make two or three different sizes. Choose one small one for small fences, a medium one for more serious ones, and one large one if you decide to build a more serious and massive fence around the entire site.

If in your country house There is no water supply, and there are no water supply networks nearby, then the only option is to drill a well or build a well. If the depth of the aquifers is very large and the soil is too hard, then you cannot do without a team of drillers with equipment. But with shallow water layers and relatively soft soil, you can cope on your own. To make a shallow well in soft soil, you can use a homemade drill. In this case, the maximum depth of the well cannot exceed 20 m. There are several types of drills. We'll look at how to make them yourself. A detailed video Self-drilling instructions will help you better understand the process.

Not always for small water supplies country house or a dacha, the construction of an expensive artesian well is justified. For seasonal water supply to a small private house or cottage, making a shallow sand well or well will be quite sufficient.

Among the main conditions for manual drilling are:

occurrence groundwater at shallow depths (up to 20 m);
the soil should not contain rocks, that is, a hand drill can only cope with sandy and clayey soils.

To make a drill for a well with your own hands, you need to have at least some experience in plumbing. Using drawings and photos from the network, you can make three types of homemade drills yourself.

To drill a well yourself or search for water for a well, two types of drilling are suitable:

shock-rope;
rotational.

The first type of work is convenient because it does not require the use of complex special devices. It is enough to make a simple drilling rig from scrap materials. Moreover, you can drill a well alone without the help of assistants.

The essence of the percussion-rope drilling method is as follows:

To make a well, a heavy pipe with a pointed end is dropped into it from a considerable height. She is tied with a rope to the frame.
Under the weight of the pipe, part of the soil is separated and falls inside the device.
Then the drill is brought to the surface again and dropped into the well from a height again.
During drilling, the wellbore gradually deepens and soil accumulates in the impact device.
After making several blows, the pipe must be removed to the surface using a winch and cleared of accumulated soil. To do this, the product is pulled away from the well and cleaned with blows of a heavy hammer.
They continue to drill the well in this manner until they reach the aquifer upon reaching the required depth.

Rotary drilling involves the use of a drill that cuts into the ground and lifts up the rock as it rotates. To drill this way, you will need two people. They should stand on the sides of the drill rod and rotate it using metal pipe or scrap.

This drilling method allows you to quickly make a well without the use of special equipment. To work, you will only need a drill of the required diameter, a rod to increase the length as you go deeper into the ground, pipes or crowbars for the wrench.

For rotary drilling, one of two types of drill is usually used: spiral, spoon. We will look at how to make them later in our article. You can learn how to properly drill a well using a hand drill from the video at the end of the article.

Making a percussion drill

We will describe how to make a percussion drill for a well and build a simple drilling rig. To do this, you should follow our instructions:

First, you need to make a tripod over the drilling site. Usually a structure 2-3 meters high is sufficient.
At its top we attach a rope block.
To lift the drill, we will use an electric or manual winch. We attach it to one of the tripod supports.
To make a handheld impact drill you will need a pipe with thick walls. In this case, its diameter must be equal to the width of the wellbore.
The upper end of the pipe is welded with a thick strip of metal. In this case, in the center of this plug it is necessary to make a hole equal to the thickness of the rope used to hang the pipe.
The bottom edge of the pipe is sharpened. In this case, you can simply sharpen the pipe wall, or you can make a gear cut. To increase the strength of the impact part of the structure, it is better to harden the sharpening in a muffle furnace.
To make it easier to remove soil accumulated during the drilling process from the device, its upper part is equipped with radial holes or slots.

Tip: if you have the opportunity to install a powerful winch, then to increase drilling efficiency, the pipe can be additionally made heavier. To do this on her top part Removable steel weights are installed.

Manufacturing of a spiral (screw) drill

The second name for a spiral drill is auger. Such a drill for a well is made with your own hands from a pipe with thick walls, which performs the functions of a vertical rod, carbide cutting tool in its lower part and spiral turns from the bottom along the rod. Hardened steel is used to make coils.

To drill a well, you need to rotate the device. In this case, the cutting edge will cut through the rock, and the coils of hardened steel will begin to push the soil upward. Thus, the pushed soil will create additional pressure in the direction of drilling. Thus, during operation, rock will accumulate between turns. To increase the efficiency of drilling, the drill must periodically remove the holes and clear the coils of accumulated soil.

The simplest version of such a drill is a disk drill. Before making a drill for a well, you need to prepare the necessary materials:

pipe with thick walls;
steel disk 0.4-0.6 cm thick (the diameter of the disk must be equal to the required width of the well).

We carry out work on the manufacture of a disk drill in the following order:

The lower part of the prepared pipe needs to be sharpened. Sometimes a sharpened tip is welded in instead. It is better to make it from hardened steel.
The steel disc is sawn into two halves. The outer side of the halves is sharpened evenly or a sharp serrated cut is made.
Both halves of the metal disk are welded to the vertical rod. In this case, it is necessary to retreat 12.5 cm from the sharpened tip. Two parts of the disk are welded on different sides. In this case, in relation to the longitudinal axis they should be located at an angle of 70 degrees. As a result, the angle between the halves of the disk will be 40 degrees. It’s better if you look at the design of the spiral drill in the photo on the net. This will make it clearer to you.
At the upper end of the rod there is a threaded coupling. It will allow you to increase the length of the rod as the well is drilled.

Tip: to make an auger, you can take not an ordinary steel disk, but a disk from a circular saw cut into two parts. The main thing is to choose the right diameter so that it matches the required width of the well.

A more difficult option for doing it yourself is a screw drill. It is made from strips of steel that are heated and twisted. Moreover, the pitch of adjacent turns should be equal to the width of the blade.

Making a spoon drill

The spoon drill is ideal for working in soft rocks. In this case, loosening of the soil occurs not only in the bottom, but also in the side parts of the device. The selected soil is accumulated inside a cylindrical body. When you drill a well with such a device, you will need to periodically remove it and clean it of accumulated rock.

The spoon drill is made from a pipe with thick walls. Moreover, its diameter is selected according to the width of the well. In addition, for manufacturing you will need a welding machine and a set of plumbing tools. We carry out work on making a drill in the following order:

Make a longitudinal cut in the pipe. The drawing shows very clearly how the hole should be positioned.
Next, using a crowbar and a heavy hammer, the pipe is given the desired profile (spoon).
The bottom and side edges of the pipe are sharpened.
A drill is welded to the bottom of the structure along the central axis. It should be thick enough with a diameter of at least 1.8-3.6 cm.
A rod is welded to the upper end of the pipe. In this case, its axis should be shifted to the side relative to the axis of the pipe by 1-1.5 cm.
It is recommended to harden all cutting edges of the drill.

Tip: the dimensions of the longitudinal cutout in the pipe are selected depending on the composition of the soil. The drier and looser the soil, the smaller the size of the cut.

If you need a very long drill rod, you can do it in several ways:

A good option is to use threaded couplings to connect the rods. So, inside each pipe section there is a thread corresponding to the diameter of the pipes. Then a threaded coupling of the required length is made. To protect against spontaneous separation of elements, a cotter pin retainer is made.
For small pipe diameters, you can use a bolt and nut welded to the ends of the sections. However, this method is not very reliable due to the fragility of the welded joint.
The simplest and effective method– cutting a coupling from a piece of pipe with a larger diameter than the dimensions of the rod. The coupling is then welded to the end of one section, and the other section is loosely inserted into the coupling and secured with a bolt and nut inserted across it.

Making one-piece drill pipe that is too long makes the job more difficult. It is better to make a detachable connection. To do this, it is enough to use sections 100-120 cm long. This way it will be easy for you to select the required length of the drill pipe and increase it as the work progresses.

To make drilling a well easier with hand tools, you can use a bailer. It makes it easier to lift the soil to the surface, since the rock is collected in a special container.
If a hand drill cannot be lifted to the surface, you can build a lever on a raised platform from barrels or logs. Thus, the drilling process will not only be facilitated, but also accelerated, because the volume of soil lifted up can be increased.
To reduce the labor intensity of work and speed up the drilling process, special devices can be used to twist the drill.
Homemade drills can be useful to you after the construction of the well. For example, you can use them to dig a foundation for fence posts, make pile foundations, and plant plants.

You can learn how to drill a well manually from the following video:

Digging holes for posts with your own hands using a shovel is a labor-intensive and time-consuming process. This may take more than one day if the decision is made to build a fence. The way out of this difficult situation is to do everything with the help of garden borer. The device is simple and does not require the use of energy, that is, it is a purely hand-held tool. It's easy to work with, no big effort required. As practice shows, in 15 minutes you can dig a hole in the ground with a diameter of 20 cm and a depth of one meter. That is, in just a couple of hours you can completely prepare places for installing poles.

Today, garden tool manufacturers offer enough wide range hand drills. They cost differently, but if the work they do is one-time, then maybe it’s worth making it yourself. How difficult is this creative process? Basically, for anyone home handyman For those who are familiar with simple plumbing tools and can handle electric welding, this task is quite doable. Let's look at how you can make a garden hand drill from scrap materials.

Required materials and tools

What materials will be required for this:

Metal pipe with a diameter of 20-25 mm.
Strip 3-5 mm thick.
A metal sheet 3-4 mm or a disk from a circular saw, you can use a cutter.
Bolts with M6 nuts, if a drill with removable knives will be manufactured.

Tools:

Welding machine complete with electrodes;
Hammer;
Hacksaw or grinder;
Roulette.

Attention! Pay attention to the internal diameter of the cutter; it should be slightly larger than the external diameter of the pipe by approximately 5-7 mm.

Manufacturing process

First of all, the length of the hand drill for the pillars is determined. Approximately, you can take it within 1.5 m. Therefore, a piece of this size is cut from the pipe. Pruning is done with a grinder.

Very important element- this is the tip of the drill. It serves as a guiding element. But if you come to the issue of ease of drilling soil (especially hard), then it’s worth making a small drill from the tip. Therefore, it is better to make the element itself from a metal strip 5 mm thick. How to do it right.

A 10 cm long piece is cut from a strip 5 mm thick and 20 mm wide.
One end of it is sharpened into a cone. This can be done with a grinder by putting an emery disc on it.
The other end is ground on both sides so that it can easily fit into the pipe. Turning length - 5 cm.
The tip is inserted into the pipe and electrically welded on all sides.
You can change the design of the tip (improve it) by making a small drill out of it. To do this, you will have to heat the device and shape it into a screw, something like a corkscrew.

It is the corkscrew design that will help increase the element’s ability to bite into hard soil. Here it is important to accurately establish the direction of twist. It should coincide with the angle of inclination of the main drill knives. Typically, the tool is twisted clockwise, which means that the sharp edge should be located on the right side.

There is another option for making a drill tip with your own hands. To do this, you will have to cut the end of the pipe longitudinally to a depth of 3-5 cm. This is done with a grinder. There should be four or five cuts, with the same distance (or approximately the same) left between them. Now, using a hammer, you need to adjust the edges of the cuts to the center of the pipe diameter. After which the joints of the cut strips are scalded with electrodes, and the end of the device is sharpened with a grinder.

Now you can proceed to installing the main knives. You can make them yourself from various cutting working tools. The cutters and disks from the circular saw were listed above. Basically, this list is longer. If cutting discs were not found, then knives can be made from sheet steel 3-4 mm thick. Just cut from a sheet required diameter circle, by the way, this can be done with both a grinder and electric welding. Then a hole is made in it with a diameter slightly larger than the diameter of the pipe. And after that the steel circle is cut into two even halves.

You can first cut the circle in half, and then cut semicircles on the two halves for the pipe. The important thing here is to finish the process by sanding down all the raw edges. The outer edges of the half-discs are sharpened to a certain sharpness. After which both knives are welded to the pipe. There are a couple of recommendations here:

The distance from the place where the tip is welded to the place where the knives are installed is 10-15 cm.
The knives themselves are installed one above the other, the distance between them is 5 cm, the installation angle is approximately 20°.
The discs must be welded so that their working edge is pointed downward, that is, when drilling, the drill should easily cut into the ground.

All that remains is to weld a small piece of pipe perpendicular to the drill pipe. This will be the handle. Its length is 50 cm, but here everyone chooses it for themselves. To prevent the effort of human hands from breaking the weld between two pipes, it is necessary to weld gussets cut from a metal sheet on both sides.

The design of the drill can be modified, or rather, improved. Sometimes it becomes necessary to dig holes for posts longer than 1.5 m. Therefore, it is recommended to add a couple of additional pipes to the tool, which will increase the length of the tool itself. How to make these elements correctly.

Firstly: it is necessary to modify the drill handle, making it removable. Therefore, it is not welded tightly, but made in the shape of the letter “T”. In this case, the pipe section that will be inserted into the drill barrel must have a diameter less than the diameter of the barrel. And at the same time, the handle should fit into the barrel unhindered, but not so much as to reduce the strength characteristics of the tool itself.
Secondly: you need to make two through holes in the handle barrel, located perpendicular to each other. The distance between them is 5-6 cm.
Thirdly: exactly the same holes with a diameter of 7 mm must be made on the drill barrel at the entry point of the handle. It turns out that both elements will be connected with two M6 bolts.
Fourth: several pipes 1.5 m long are prepared, corresponding to the diameter of the handle barrel, in which the same holes are drilled at both ends. Locations are the same as on the handle barrel.

To lengthen a hand drill two or three times, you need to unscrew the fastening bolts, remove the handle, insert the pipe into the pipe, secure them with bolts, install a handle on the free end of the extended drill, attaching it with two bolts.

As for the diameter of the holes for the posts, this can also be changed if the knives are made removable. To do this, at the place where the knives are installed, it is necessary to weld two shelves cut from a strip 5 mm thick. You can make the shelf in the form of a circle with an internal hole for the tool pipe. A circle with a diameter of 8-10 cm is cut out of a sheet of iron, a hole is made in it for the pipe, and this element is installed and welded to the trunk. You must first make four through holes in it, two on each side. Removable knives will be attached to them.

Attention! Removable knives are fastened with M6 bolts. Installation of bolts should be done with the thread upward towards the handle. They simply in this position will not interfere with the process of drilling the soil.

You can increase the efficiency of the drill if you install an additional element between the knives and the tip. This is, in fact, a flat cutter that will loosen the soil before inserting the knives and center the drill itself. A small addition will make it possible to increase the drilling speed, especially in hard soils, and in places where there is large number plant roots.

It’s not difficult to make such a flat cutter with your own hands. To do this, you will need a plate 4-5 mm thick and 30 mm wide. Two pieces of 80 mm length are cut out of it. They are welded opposite each other to the drill barrel. The right edge of the additional knives becomes sharper. To prevent heavy loads from breaking the flat cutter, you can add two metal gussets to their fastening.

In principle, this is how you can make a hand drill with your own hands for digging holes for pillars. Let's face it, it won't take very long to make this tool, about two hours, no more.