Mini grinder from a motor. Homemade grinder from improvised tools. Used protective equipment

Anyone who has worked with angle grinders knows not only all its advantages, but also its disadvantages. One of the main ones is the low accuracy of cutting samples when working manually. This greatly complicates the process, especially if several pieces are needed, and with exactly the same linear parameters. And if we take into account vibration, "reverse" impact, then the use of a stationary installation is more than advisable.

Machine industrial production hardly worth buying. The price of the simplest model is within 22,500 rubles. Basically, it's not that expensive. But she has some disadvantages that a good owner suggests that it is easier to assemble a cutting machine with your own hands using a bed and a grinder.

First, the capabilities of factory machines are somewhat limited. For example, the one given as an example cuts a pipe with a diameter of no more than 100 mm. And in everyday life you sometimes have to work with samples of a larger cross section.

Secondly, everyone has their own needs, and their specific model in in full, of course, will not be able to satisfy. Alteration (refinement) of any factory equipment quite often requires large financial investments. Sometimes this is generally impossible or irrational, for example, if the product is made of alloys that are difficult to process. At least with the help household inverter small power to "digest" something will be quite problematic.

There are quite a few models of home-made cutting machines based on the "grinder". Consider the process and manufacturing features of only a few, the most simple. Understanding the meaning of all technological operations and assembly nuances, it will not be difficult to come up with your own, no less original design.

Option number 1

A general view of the machine (although it is more of a fixture) is shown in the figure:

Its components are angle grinders () and a pipe that simultaneously performs the function of a frame and a working handle. It is not difficult to fix a “grinder” on it with a metal plate made of a thick piece of iron - it will take no more than half an hour. The support for the structure can be made from the same metal sample by welding a corner to it. The end of the lever is mounted on the axle, and its return stroke is provided by a spring.

This model is convenient because it has a small weight, and you can install it almost anywhere. And the assembly will not require any costs - everything you need can be found without difficulty.

Option number 2

These stationary models are more complex, but provide more accurate cutting of the material.

What will need to be done:

• Desktop. Its frame is easy to weld from a channel or corner. Suitable as a table sheet metal, although chipboard, MDF or PSF are often used. It all depends on the purpose for which the installation is going and with what blanks the master intends to work.
• Frame construction. One part is motionless, and is a support. It is mounted on a tabletop and fastened with bolts or welding. The second with the help of a swivel - to the first. A "grinder" is installed on it, the position of which is easily changed manually. Springs are provided to return the tool to its original position.
• Ruler. It will help to set the required dimensions of cut samples. As an option - a strip of iron or a tube with marks and a movable marker.

In principle, there is nothing particularly complicated here. If the idea itself is clear, then draw up your own drawing, having decided on the linear parameters constituent parts machine, easy.

What to consider:

• There are various models of machines. In some, the "grinder" is located under the countertop, in others - above it. From a safety point of view, the second option is more reliable.
• In the tabletop, it is necessary to make a cutout along the line adjoining the angle grinder disk to it.
• If there is basic knowledge in electronics, then it is better to turn on the machine through a magnetic starter, and combine the button with the pedal. In this case, even if the hands are busy, the angle grinder can be stopped at any time with the foot.

On a note!

Do not forget about the basic safety requirements. After the assembly is completed, the machine should be “driven” at idle and make sure that there is no beating of the abrasive disc - it should not touch the protective cover.

Bulgarian is a very useful and versatile tool. With it, you can cut metal, stone, tiles and, of course, grind surfaces, but sometimes it is much easier and more accurate to perform these works. stationary machine. Fortunately, you can make a cutting machine from a grinder with your own hands.

Pros and cons of a homemade machine

If you have to hold a grinder in your hands often enough, you probably managed to feel its disadvantages. Weak spots tool in its main advantage - mobility.

Firstly, it is not always possible to fix the parts during cutting, and their slightest vibration can lead to the destruction of the abrasive disc, which, in turn, is fraught with serious injuries.

Secondly, it is rather difficult to control a clear perpendicularity of the cut with a mobile version of the tool, take into account the thickness of the disk in relation to the mark and the material being cut, and even hold it if necessary.

Thirdly, it is quite difficult to cut several parts of the same size with a tool, especially when it comes to twigs and small pipes - after cutting, you also have to trim the parts.

And, of course, the employment of both hands and the utmost tedious concentration during work, since the angle grinder is one of the most dangerous tools. What is only worth a kickback - a sudden rejection of the tool when the rotating abrasive disc is jammed in the workpiece. The danger of kickback lies not so much in the rejection of the tool as in the concomitant destruction of the circle. At such high speeds, fragments of abrasive can seriously injure the operator.

Especially often, a kickback occurs at the end of the cut, when only a small jumper connects the parts. In this case, it is recommended to stop the tool without cutting the workpiece to the end, remove the circle and cut the part with reverse side. Cutting machine, which can be constructed from available materials able to solve everything listed problems and provide additional security.

Photo gallery: DIY tool

Buy or not?

Finding a ready-made machine on the shelves of the store that meets your needs at first glance is enough simple task. But there is hardly a design that is made completely in accordance with your requirements, but they are all different for everyone. In such cases, the owners of the machines are trying to improve or remake them, but they face very serious obstacles - either the manufacturers made the machine from alloys that are very difficult to work with by welding, or they did not take into account the little things that you need specifically - for example, an accurate ruler or a more elastic spring. Remaking someone else's is much more difficult than making your own.

Simplest homemade machine for a small grinder, you can do it at a minimum cost and in just a few hours.

From a metal pipe and corners

The finished design of such a machine will be a long metal pipe that performs both the role of a frame and the role of a handle. Closer to one end, a transverse metal bar with two holes for fixing the grinder.

The pipe in this design is both a handle and a mount

On the same side, the pipe is attached to one side of a small piece of the corner on the movable shaft, while the corner itself is attached on the other side either to the desktop or simply to the floor in the working room. On the opposite side of the mount, it is imperative to fix the spring, which will allow the entire structure to return to its original position. That's all - the machine is ready, you just need to properly fix the grinder. Of course, this option is for the most simple jobs with metal, and for complex ones where accuracy is required, the design should already be more stable and thorough.

Video: cutting machine from improvised materials

Cutting machine with bed (drawing)

Necessary tools and materials

For the manufacture of cutting machine you will need the following materials and tools: steel corner, profile pipe, sheet metal for platform (or more easy option from chipboard), welding machine, channel, drill, shaft, several identical bearings, a small diameter pipe, a spring, as well as a relay and a pedal. Welding, if you think about it, can be replaced with strong bolts, and for this you need a drill. By the way, this option will allow, in addition to everything else, to disassemble the machine if necessary.

Drawing

The manufacture of the machine should begin with cutting parts onto the frame. To prevent damage to expensive material, carefully study the numerous drawings that can be found on the Internet or follow the models on the shelves. In the latter case, make a drawing yourself, you don’t need special skills for this - the main thing is to present it on paper finished structure and its proportions. Each grinder needs its own drawing, because the tools from different manufacturers can be radically different - somewhere it will be possible to remove the handle, somewhere you will have to come up with a stand for the whole angle grinder! Plus, under different sizes disk needs a different frame. Below are several diagrams.

Photo gallery: diagrams of cutting machines from a grinder for metal and for tiles

frame

The simplest frame consists of two frames on a common axis. The lower frame should be fixed on a platform - metal or chipboard. If the grinder is large, it is better to use metal. The upper frame, to which the grinder is screwed, must rotate vertically relative to the lower one, like a pendulum. A spring is needed to fix the starting position. A mount is welded to the lower frame, which consists of a clamping angle and a movable clamp.

The frame of the bed can be made of metal

Ruler

It is very important to provide measuring details in the machine, thanks to which you can cut workpieces with an accuracy of up to 1 mm. In this case, a movable ruler with a limiter welded to the tube is best suited. Having set the exact size with its help and secured with an end screw, you can get to work.

Electronics

For convenience of work, provide in the design a starting pedal or a button with switching through a low-voltage relay of 12 V. Through it, voltage will be supplied to the angle grinder. With the help of such a simple design, we free our hands, achieve an accurate even cut without the use of a vice, and save time on accurate measurements. This tool will replace cut-off saw for metal, and if necessary, you can always return the angle grinder to its mobile state.

Video: metal grinder frame

Video: homemade machine with a ruler for metal

Security

When working with a grinder, stationary or manual, safety must always be remembered. In the case of stationary option you need to consider the direction of the tool and the position of the guard - it is important that the guard completely hides the area in which the operator is located. If you have a machine, you will probably want to use the tool for other purposes - for example, attach a saw blade for wood to the angle grinder, which is absolutely impossible!

Wood is a heterogeneous material, it can contain knots or even nails. The rotational speed of the angle grinder significantly exceeds the prescribed speed of a standard sawmill, which will very quickly render the saw blade unusable.

But, in addition, unlike abrasive and grinding discs, saw blades have sharp teeth that represent high danger. Risking your health for a quick cut is simply unwise. After installing the tool and a new disk, the work of the grinder should be checked for at least 1 minute for idling– the circle must rotate completely freely, without excessive vibration, without touching the casing.

A cutting machine from a grinder is not so difficult to make yourself. And in the future, this tool will help you save time and effort.

Since the invention of the grinder, the popularity of this tool has only increased. This tool has a lot of advantages, thanks to which it remains in demand in various fields and branches of life. The disadvantage of a standard grinder is the fact that it is not designed to work with miniature parts. This problem was solved by issuing mini grinders. If you can’t buy the tool, then you can make a mini grinder yourself.

Angle grinder angle grinder the standard type differs from the mini-grinder in size, but otherwise the functionality is almost the same. A small grinder is used mainly in areas where work is performed with small details. Unlike grinder standard size, when working with which you need to hold it with both hands, then with a mini grinder everything is much easier. The tool is lightweight, so the operator can hold it with one hand while holding the workpiece with the other.

Mini-tools are used mainly by jewelers, where the slightest accuracy is important in the manufacture of certain small parts. This tool can be used when repairing watches, electronics, small parts. Mini-grinders are intended for cutting metal, plastic and wooden products. The demand for them arises even in everyday life, when it is necessary to grind, sharpen or saw a small part.

It is important to know! If there is a need to use a mini grinder, then it is not necessary to buy it for this. It is quite simple to make it, besides, it will require minimum set accessories.

How to make a mini grinder yourself?

In order to make your own mini grinder, you will need the main element - an electric motor. You can get it from old cassette recorders, battery-operated typewriters, order it online, buy it from radio stores, or find it in your attic or garage. Batteries, accumulators or a mains power supply from a mobile phone (power supply unit) can be used as a power supply for such a motor. The main thing is that the voltage and current of the source fit the motor.

Two wires must be removed from the motor, through which power will be supplied for its operation. Depending on the size of the motor, it is necessary to choose the appropriate diameter of the PVC pipe, or a tube from something else. Inside which the device will be placed. The motor shaft must protrude from the pipe. It is also necessary to leave space in the handset for batteries and a switch.

It is important to know! The electric motor inside the tube must be well fixed, otherwise when you try to saw something off, it will move or rotate inside the body.

In order to plug the used body pipe from behind, you can use the appropriate pipe plugs (if you used a standard pvc pipe) or come up with a cover yourself. Also, two holes should be cut on the case or in the back cover:

1. To set the button to start and stop the machine under construction.
2. For the speed controller of the electric motor shaft. Such a regulator ready-made can also be removed from an old tape recorder.

We recommend positioning the button and regulator so that it is convenient to turn the mini grinder on and off with one finger. If the device will operate on batteries, then it is imperative to provide for the installation of a removable cover, with the help of which the batteries will be replaced. If the product will operate from a mains power supply, then you can solder the appropriate socket for connecting it to the case.

We recommend equipping the electric motor shaft device collet clamp. This will allow the use of homemade apparatus all kinds of discs, drills and various special nozzles from drills. The collet mechanism can be found in stores that specialize in selling power tools or electronic parts.

Special discs for working on a mini grinder can be purchased or made independently by cutting them out of a large disc. Such a mini-grinder is not suitable for sawing metal thick, but it is quite suitable for cutting plastic, wood and other materials. With such simple actions, you can make the desired device, while saving money and time that you would have spent looking for a factory tool.

If your work is professionally connected with the need to use a mini grinder, then it is better to find and buy a factory version.

Advantages and disadvantages

The advantages of a home-made product can only be attributed to cost savings, since almost all the components for making a mini grinder can be found in the garage. Unlike professional mini-grinders, which are equipped with all the necessary nozzles in the kit, such accessories are excluded in a home-made angle grinder, so you will need to buy or make them yourself.

The disadvantages of a mini angle grinder include the fact that in most cases it uses a low-power motor, while professional models have more powerful and reliable motors.

It is difficult to find a gasoline tool that would compare with a chainsaw in terms of the number of homemade products. Winches, boat motors, motor drills, motor bicycles, go-karts, coroders can be designed on a common motor basis - a gasoline chain saw. Among the most simple homemade from a chainsaw, one cannot fail to mention the grinder, the performance and versatility of which allows you to work with various natural and artificial materials.

The modern level of production makes it possible for everyone to buy a ready-made grinder attachment for a chainsaw and re-equip it with a gas cutter. We will consider both situations: when there is a factory nozzle and when you have to assemble it yourself to transform the saw into a gasoline cutter.

Bulgarian from a chainsaw: stages of work

• powerful chainsaw - Calm 180 or any other professional class is suitable;
• working knot from the grinder;
• 3 factory serviceable tires of size 40-50 cm;
• 2 reels;
• belt.

Working process:

1. run the belt parallel to the tire;
2. equip the saw with a pulley and fix it on the drive sprocket;
3. remove the gear from the head assembly of the working angle grinder and pre-cut it;
4. according to the dimensions, assemble the pulley and weld it to the structure;
5. Shorten the 2 remaining guides - they should not interfere with the normal operation of the belt. It is desirable that one of the tires be sharpened for the installation of a grinder assembly and connected with welding;
6. weld them to the structure;
7. buy grinding wheels, fix them and start working.

If desired, you can replace the saw air filter with a more wear-resistant one, although most modern saws they don't need it.

Proper installation of the “Bulgarian” nozzle on a chainsaw

The range of these accessories is quite wide and is available for most modern chainsaws.

It consists of a drive drum (pulley), which is connected to the motor through a belt drive and rotates directly from it, a safety shield and fasteners.

The process of re-equipping a saw into a grinder with a ready-made auxiliary device looks like this:

• study the instructions for its correct installation;
• remove the chainsaw guide, as well as release the clutch;
• aggregate the pulley on the saw sprocket drive shaft;
• connect a belt drive with a saw blade, which will help change the torque of the new device (otherwise a gearbox is needed);
• take the studs that came with the grinder attachment, or use the fasteners that were removed along with the saw bar and fasten the adapter with them.

As you can see, a series of simple actions - and the grinder attachment for the chainsaw quickly adapts to a motorized tool that almost everyone has.

Pros and cons of do-it-yourself chainsaw grinders

Angle grinders, popularly known as "Bulgarian" can be recreated from numerous manual gasoline and power tools. But the option that we will consider using chain saw, is considered the most convenient and lightweight.

The advantages of such homemade devices consider:

• autonomy - gas tools do not depend on the availability of power, like factory-made electric grinders, which require electrical outlets and extension cords to turn on;
• high power, not comparable with the force of the factory electric grinders- the power of power cutters based on saws of household power is usually several times greater than traction professional models electric grinders;
• ease of design and assembly - everything you need for this can be found at home or bought at the nearest tool store;
• price - a grinder from a chainsaw will cost several times cheaper than its original counterpart.

The disadvantages of home-made power cutters are:

• their sensitivity to metal dust - saw air filters quickly become clogged and fail. This entails problems with turning on the engine - it starts to stall, does not hold revs and wears out faster;
• danger to the health and life of the operator - grinding discs often break and fly apart, which threatens the operator and others with injuries.

What else do you need to know about the attachments "Bulgarian" on the chainsaw?

Despite the abundance of auxiliary adapters for chainsaws, their use is not always safe. main reason this is that the saw blade may not withstand the load and break. After all, the torque of the saw is several times higher than that of grinders, in which it rarely rises above the mark of 6-7 thousand revolutions.

The result of this can be not only a breakdown of equipment, but also injury to the operator himself.

• use a protective cover - it must be new, complete, without chips and deformations;
• grinding wheels should be chosen in diameter up to 11.5 cm - large-sized elements will disable the grinder faster;
• a set of “grinder” adapters must correspond to the modification of the saw itself - this will not only save you from the hassle of installation, but also help save the life and health of the user.