12 volt angle grinder with my own hands

The angle grinder from the battery with their own Hands

Quite often in everyday life you need to repurpose working tools. This does not apply to the situation where you need to use an angle grinder, and such is not available. To help are options come drill, benzo. on the other hand electric saw, what the term of the project, what the tool is available.

The usual ineffective method of obtaining an angle grinder from an electric saw

angle grinder from a drill

For such a conversion will be useful at home the following tools:

Before you begin the conversion, you must make sure that in the next few days is not useful in the works drill itself. In the last article I told you how to connect and run a motor at 380 volts in a single-phase 220 V electrical system. And then it is enough to follow the step-by-step annotation:

  • Choose a nozzle for the future angle grinder.
  • Take a rod of steel of small cross section and cut one of its edges. This action is necessary for the best entry specifically into the nozzle. Also, for the best coupling should be a bit to grind the places that will be in contact with the petals of the chuck is not the rod.
  • Make the fixation of all parts.

A sharp and not the usual method of making an angle grinder

There is not a second, more complicated method to achieve the desired result.

  • Remove the chuck from the drill. For the angle grinder does not need it, because it has the option to clean, lubricate and store.
  • Select nozzle for the coming tool. It is better that it was a piece of strong steel, lightweight version will be inappropriate here.
  • The choice of the rod. It needs such a length, that 1,8-1,9 cm of it protrudes out of the drill. Next, you should grind one of its ends raspilom, that in the process came out the rod, perfectly coinciding with the slot in the nozzle. Before the joint, it is worth to smear its ends with machine oil for the best passage.
  • The installation of the ball bearing is carried out to the area for withdrawal. Through it the bar will be threaded with the upcoming fixation at the base. If this step is not necessary, the rod is fixed in its own place.

Rewinding the stator (angle grinder) of the angle grinder, on the knee. Motor rewinding

Took the time to bring the angle grinder

, which was given to me for spare parts. I decided to show at the same time

12 volt battery charger with their own hands

homemade. No machine tools were used in the manufacture of the current (a motor with a disk bolt and almost

Following the annotations angle grinder comes out in 1-2 hours

Make by this method angle grinder is an option in a few hours and get the right tool.

angle grinder out of a chainsaw and electric saw

A more common method to make an angle grinder with their own hands is to convert it from a gasoline or electric saw. Because of the finished fixture

What a chainsaw or other electronic form of her transformed into an angle grinder, buy any construction store special attachments. They will help in a few deeds to make these transformations.

For an angle grinder to reduce the risk of breaking the blade. For this purpose, the saw is equipped with a special protective cover. It is also worth reducing the number of revolutions using the speed reducer.

Makeshift angle grinder works from 12 volt acb

angle grinder. a modern tool used by almost all ironworkers. It is used to cut material, turn tools, grind parts. But there are situations when there is no 220V network or it is located far away and there is not enough cable for connection.

Helps out makeshift angle grinder, working from 12 V, which can be connected to a small battery or a network of the car. The advantages of such a tool. the quiet operation, which allows you to use it without fear of problems with the neighbors.

This self-made tool is driven by electric motor 775, working from 12 24 V. It has a cooling fan, the armature is located on bearings. All this makes the motor a long-liver, even in active use.

In addition to the motor, prepare: adapter for angle grinder; connector, through which the power source is connected; paint; switch; wires; self-tapping screws. The body is made from a variety of PVC-parts used for the device of water, sewage, electrical networks. Use a hacksaw for metal, glue, drill, caliper, drilling machine, marker.

For the body (handle) you prepare the parts from PVC: a piece of pipe; 90° connecting corner; adapter for a smaller diameter. The adapter is glued to the angle piece, then to its free end. a piece of pipe. You get an elegant handle.

Make guard to protect operator from sparks, splinters of disk. Use 11-cm-diameter PVC plug. In its center drill a hole with a diameter equal to the size of the part protruding from the motor housing (next to the shaft outlet). On the sides of it two more holes are made for fixing screws. The latter are used to fasten the motor to the panel.

Batteries without a “memory effect

Cordless angle grinders are equipped with the most power-consuming batteries of today. lithium-ion (Li-Ion). The latest lithium-ion battery models are also compact and lightweight.

In some modern models complete charging takes 30 minutes, and downtime can be avoided by using an extra battery. Charging conditions of Li-Ion batteries do not affect their capacity and service life.

That is, the “memory effect” is completely eliminated, and they can be recharged regardless of the degree of discharge and not necessarily to the end. Self-discharge rate not exceed 5%.

Among the disadvantages. a strong heating during charging, which requires certain protective measures, increasing the cost. Li-ion batteries do not like any kind of impact, falls and negative temperatures. Protective measures affect their price.

SPECIALIST ADVICE

When selecting a cordless angle grinder, consider the following facts. The more you can adjust the operating parameters, the more you can conserve battery power. Multi-contact fastening reduces the likelihood of disconnecting the battery in case of strong vibration. Brushless motor provides high operating life and high efficiency with minimum maintenance. Quick-release mechanisms for easy tool changes.

Assembly steps

The manufacturing process of the angle grinder with their own hands begins with the manufacture of the frame (body). With the help of a plastic connecting angle and a cone-shaped shape the construction of the holder is assembled. Parts are fixed along the cut with glue. The final handle is a sturdy chassis for your future self-made grinder.

Parts for your 12 volt angle grinder

In the second stage, home craftsmen take care of the creation of personal protective equipment. The shield will be needed in order to protect the eyes from sparks generated by the angle grinder during work. Part of the plastic pipe, if properly trimmed, can serve as a plug. After drilling holes in the plug, you need to attach it with screws to the main body.

Using a marker and ruler, you should measure off the excess part of the main tube to create a territory on this plane for the rotation of the discs of the homemade angle grinder. After completing the work, you need to put the resulting structure on the motor, so that the plastic part of the pipe framed it.

Read more:  How to cut glass with an angle grinder

In the place where the motor is mounted, you need to make as many holes as possible for the insertion of fixing elements. The screws and self-tapping screws, fixed at the mounting points, will hold the motor and protect it from a critical rise in temperature. When installing the homemade motor, it is recommended not to glue individual parts, and fasten with screws, because in case of disassembly, glued parts will be more difficult to separate from each other.

The final stage of assembly is considered the installation of the adapter on the motor shaft. All kinds of attachments used in the functioning of the self-made angle grinder are also put on the shaft. In the back of the construction you need to install a switch and wires connected to the motor.

Options for making a cutter from an angle grinder with their own hands

Popular models of angle grinders with soft start and speed control

Makeshift angle grinder works from acb 12 volts

Angular grinder. a modern tool, which is used by almost all masters of iron. It cuts material, sharpens tools, grinds parts. But there are situations when there is no 220 V mains or it is located far away and there is not enough cable to connect.

Will help out makeshift angle grinder, working from 12 volts, which you can connect to a small battery or to the network of the car. The advantages of such a tool. quiet operation, which allows you to use it without fear of problems with the neighbors.

Self-made grinder is driven by electric motor 775, working from 12 24 V. It has a cooling fan, the armature is located on bearings. All this makes the motor a long-life motor, even in active use.

In addition to the motor prepare: an adapter for the angle grinder; connector, through which the power supply is connected; paint; switch; wires; self-tapping screws. The body is made from a variety of PVC-parts used for the device of water, sewage, electrical networks. Of the tools used are a hacksaw for metal, glue, drill, caliper, boron, marker.

How to make a cordless angle grinder from improvised means

Hello, fellow do-it-yourselfers! In today’s article we will look at how to make a very useful tool. Namely, let’s take a detailed look at how to make a cordless angle grinder. It’s no secret that the angle grinder is an indispensable tool in the garage, but when you have to work with this tool outside the garage, it is not very convenient to use it. Since sometimes you can not always find a power source in the field. So, if you ever thought about buying a cordless angle grinder, then you probably came face to face with a not entirely pleasant cost. The same homemade will offend many times cheaper and at the same time will not be inferior to its factory counterparts. Well, I think we should not procrastinate with a long preface It should be noted that some links to the components of the design you can find at the end of the article.For a homemade cordless angle grinder will need:

From a pipe with a diameter of 40 mm make the handle. To do this, you should decide how long you want the handle, mark the length you want with a marker and cut off the excess with a hacksaw for metal. We will need a pipe with a diameter of 50 mm for attaching the electric motor. Cut off from the 50 mm pipe such a piece so that it could locate the motor

The motor from the angle grinder to 12 volts with his hands

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But there is a simple solution. You can get a step-up DC-DC converter. so it will boost the voltage and therefore the engine will rev up. If the DC-DC step up is also with a regulator you can regulate the RPM. Here’s an example, it goes from 12V to 80V. https://www.aliexpress.com/item/High-Eff34.Gza6Di

If you want it, you can build a DC-DC circuit with MK switch and you can even turn it up to 300V

By the way a cheap step up can be assembled according to this scheme only there is a scheme for small currents and you should make already under those currents that you need.

Top models of battery-powered grinders

We have selected some portable bolsters that (in our opinion) are worth considering as a purchase.

Small, easy to hold. Lithium-ion battery with a decent capacity. 5.2 Amps / hours. Weight without battery is less than three pounds. Sold without battery and charger. must be bought separately.

Tool has soft start, dust cover, quick-clamp nut. There is protection against overheating and accidental start. It’s quite comfortable to work with. Circle change is fast because the spindle can be locked with a separate button. It is suitable for attachments up to 15 centimeters in diameter. Speed is eight thousand revolutions per minute.

This model will be a little more powerful. its speed is up to 10000 rpm. Suitable for metal cutting, sanding, working with abrasive discs. In the purchase kit comes with a protective cover. Battery has a capacity of three A / h, and the par value of 18B.

Accessories can be changed very quickly, thanks to the same spindle lock function as in the previous model. Manufacturer has installed motor overload protection. No battery for sale, and the price is not small. at least 12000.

Perfect for working with various metal products: angles, profiles, pipes, fittings. Also suitable for sanding various materials.

Speed of rotation is 9000 rpm. Works with nozzles up to 125 millimeters, and you can change them, like in previous models. Battery manufacturer offers a universal. will fit other tools of the same company. There is a soft start, the gearbox is hidden in the metal housing, due to which the heat is removed many times better. Vibration at work is reduced due to the pads on the handle.

Probably the most inexpensive cordless angle grinder of all with wheels up to 115 millimeters. Suitable for working with stone, metal. Blades change quickly, in a similar fashion to the above models. Brush-type slider, handles are equipped with pads preventing tool from slipping out of hands while working.

The battery may be lithium-ion, or it may be nickel-cadmium. Sold without battery and charger, costs about 5-7 thousand.

Features a two amp/hour 24v NiCd battery. Allowable nozzle size is 11.5 centimeters. Turning speed of the disc is 7000 rpm. There are two batteries, and probably the most advantageous model in terms of price and quality.

Also pretty inexpensive angle grinder. Can grind, cut, deburr metal. Body is small, handle is quite ergonomic. Discs can be changed by locking the spindle, which greatly reduces the time for this procedure. The brush motor, the speed of rotation of seven thousand revolutions per minute. Has overheat protection and built-in cooling system. Weighs about two kilograms without battery. The battery and the charger itself is not included, and

angle grinder with brushless motor. Can be used for grinding and cutting. Has a good performance and long overhaul-free life. Speed of nine thousand rpm.

If the disk jams, there is a system of protection against backfire, resistant to overloading, but they should not be allowed all the same. Its disc diameter is 12.5 centimeters, and its weight (without the battery) is just over two pounds. It costs a pretty penny. in the neighborhood of 20,000. Comes, of course, without the battery and charger to him.

Suitable for stone and metal work. There is a second handle, the body is easy to grip, its surface is rubberized. Surprisingly, this model comes with a battery and battery charger. Weighs just over two and a half pounds. There is a handy storage case for the tool and its transportation. It costs, by the way, not so expensive for a portable angle grinder. about ten thousand.

Read more:  How to make a holder for an angle grinder

Suitable for work with thin metal parts and profiles, you can use it for grinding. There is a soft start, which increases the life of the tool. It fits discs up to 115 mm in diameter. Battery 18V and capacity of three amps / hr. Additional handle can change its position. No battery and charger included in the purchase set. Weight of the angle grinder without accessories is two kilograms. Metal gearbox. the heat is carried away much better and overheating is unlikely.

Pretty powerful model, it is even used in manufacturing and repair shops. Suitable for all types of work with any material. Brushless motor for very high efficiency. Repair-free service life is extremely long. Speed of the disc is 8500 rpm. The motor is reliably protected by a triple winding. Keeps out dust and debris. There is an additional handle, the position of which can be changed. The battery is a suitable 18V lithium-ion battery with a capacity of five amps/hour.

Top models of cordless grinders

We have selected a number of portable grinders, which (in our opinion) are worth considering as a purchase.

Small, easy to hold. Lithium-ion battery with a decent capacity of 5.2 Ampere/hours. Weight without battery is just under three kilograms. Sold without battery and charger. must be bought separately.

Tool has soft start, dust cover, quick-clamp nut. There is protection against overheating and accidental start. It is quite comfortable to work with. The wheel changes quickly because the spindle can be locked with a separate button. It fits nozzles up to 15 cm in diameter. Speed is eight thousand revolutions per minute.

This model will be a little more powerful. its speed up to 10000 rpm. Suitable for metal cutting, grinding, working with abrasive discs. In the sales kit comes with a protective cover. Battery has a capacity of three A / h, and the rating of 18V.

Accessories can be changed very quickly thanks to the same spindle lock function as the previous model. Manufacturer has installed motor overload protection. No battery on sale, but the price is not small. at least 12000.

Perfect for working with different metal products: angles, profiles, pipes, fittings. Suitable for grinding of different materials.

Speed of rotation is 9000 rpm. Runs with attachments up to 125mm, and changes like previous models. The manufacturer offers a universal battery. will fit another tool from the same company. There is a soft start, the gearbox is hidden in the metal housing, due to which the heat is removed many times better. Vibration at work is reduced due to the pads on the handle.

Probably the most inexpensive cordless angle grinder of all up to 115 millimeters. Suitable for stone, metal. Discs are changed quickly, following the same principle as on the models described above. Brush-type motor, handles have pads that prevent tool from slipping out of hands while operating.

Battery can be either lithium-ion or nickel-cadmium. Sold without battery and charger, costs about 5-7 thousand.

Has a nickel-cadmium battery for two amps / hour and 24V. Allowable nozzle size is 11.5 centimeters. Disk speed is 7000 rpm. Has two battery packs, and this is probably the best value for money and quality.

Also quite inexpensive angle grinder. Can grind, cut, deburr metal. Casing is small, handle is quite ergonomic. Changing discs is done by locking the spindle, which greatly reduces the time for this procedure. The motor is a brushed, the speed of seven thousand revolutions per minute. Protection against overheating and built-in cooling system. Weighs about two kilograms without battery. The battery itself and the battery charger are not included, but

Brushless angle grinder. Can be used for grinding and cutting. Good performance and long service life. Speed has nine thousand revolutions per minute.

If the disc jams, there is a system of reverse shock protection, resistant to overloading, but do not allow them still. Its disc diameter is 12.5 cm, and its weight (without battery) is just over two pounds. It costs a lot. in the area of 20 000. Comes, of course, without the battery and battery charger.

Suitable for work with stone and metal. Has second grip, comfortable grip and rubber coated surface. Surprisingly, this model comes with a battery and charger. Weighs just over two and a half pounds. There is a handy storage case to store the tool and transport it. By the way, it costs not so much for a portable angle grinder. about ten thousand.

Suitable for work with thin metal parts and profile, you can use it for grinding. There is a soft start, which increases the life of the tool. It is suitable for grinding discs up to 115 millimeters in diameter. 18V battery with three amps/hour capacity. Additional handle can change its position. No battery and charger included in the sales kit. Weight of the angle grinder without accessories is two kilograms. Gearbox in a metal case. the heat is removed much better and overheating is unlikely.

Pretty powerful model, even used in production and repair shops. Suitable for all types of jobs in any material. The motor is brushless and has a very high efficiency. Extremely long service life without repair. The speed of the disc is 8500 rpm. Motor is reliably protected by a triple winding. Keeps out dust and debris. There is an additional handle, whose position can be changed. Rechargeable battery suitable for 18V lithium-ion battery with five amps/hour capacity.

Advantages and preparation for assembly

The home-built angle grinder has a number of outstanding advantages over automatic devices. Corded tool is very limited in operation due to compulsory contact with mains power supply. The 12-volt angle grinder, which does not depend on a common power supply, can be charged from a portable battery. This feature makes the angle grinder samodelku excellent mobile tool.

The angle grinder-homemade grinder can also be recharged from alternative power sources, such as the car power grid or computer power supply. The main positive quality of the homemade is considered to be the low noise level produced by the tool when working, which allows you to freely use the device in hard-to-reach conditions. The relatively low price of all costs to assemble the equipment also pleases the users of self-made.

It is hard to find a universal way of how to make your own angle grinder at home. Each user adds his own changes to the recipe of the craft, but there is a standard set of components, with which it is easiest to construct a homemade.

Making a mini angle grinder

The most responsible part is to plant the bearing on a slightly machined (with a drill and file) stand from the mat. computer circuit boards and press the cable into place.

We disassemble the clip. crocodile and using a homemade clamp attach the bearing to it. A piece of cable from speedometer is secured with plastic clamps.

We put the electric motor together with a relay into a cut-to-size sealant bottle (empty spaces are filled with pieces of rubber). We additionally fix it with a bolt, which rests in the motor body against turning.

The cutting disk is also homemade. We make a protective cover from plastic for it.

The electric circuit is simple: when you press the mini-key a relay switches on, which in turn closes the power contacts and supplies voltage to the motor.

After assembling we get a new structure with unusual location of the motor. When working, the tool is held in the same way as an ordinary “angle grinder”, only now it has become more mobile.

Help here is a homemade angle grinder on a volt, working on any portable battery is powerful enough

To make the tool, we take the motor from the compressor for tire inflation. Let’s take off the gearbox. Next we make an adapter. We use the old angle grinder body.

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We install the button. Let’s connect the wires to the motor. All that’s left to do is to finally assemble. We use clamps for assembling. Screw on the standard screws in the front.

For aesthetics you can use a heat shrink. We will cut a corner to demonstrate the capabilities of our 12 V handmade cutting torch. Using a car battery. Start cutting. Attention! In the video, the craftsman violates the safety rules, does not use protective equipment. It is not only inconvenient to work with one hand, but also extremely dangerous!

The wire should be as short as possible. Ideally not more than 1.5 meters. Cross-section not less than 4 square millimeters. Then you can use a small 12 volt battery. We know that cable losses are very high at DC current. It is important to be able to perform work within arm’s length.

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Making a soft starter socket

The most important requirement for such an outlet is its mobility. That’s why you’ll need a portable.

With it, you will be able to smoothly run the tool anywhere. in the garage, in the country house, when building your house in different parts of the construction site.

The first thing you need to do is to disassemble the carrier.

The main power wires in it can either be soldered or connected on screw terminals.

Depending on this, so will the connection of your additional socket. It should be exactly an additional socket near the carrier to be able to connect the tool in different modes at the same time.

By the way, if you by mistake include an angle grinder or circular grinder, having a factory built-in soft starter in the outlet, also equipped with such a controller, then surprisingly everything will work. The only point. you get a delay in starting the saw or the disk rpm for a couple of seconds, which is not very convenient in operation and without a habit can be puzzling.

Here are the real tests of such connection, made by one master from YouTube BaRmAgLoT777. His comment after trying it out on a Dremel type engraver, a Bosch drill, a Makita router, an Interskol circular saw:

Then to assemble the outlet take a stranded copper wire of 2.5 mm2 and stripping its ends.

After that you need to tin the pad on the carrier, where this wire will be soldered.

Safely solder the cable cores to these pads.

Carefully lay the wires and close the extension cord.

You take a square outdoor socket for installation on the outer surface of the walls, and in its body try on a soft starter unit. Since it has compact rectangular dimensions, it should fit in there without too much trouble.

You mount and fix the socket body on the same site with an extension cord.

You connect the sensor in the gap of any wire, phase or neutral. Do not be confused, it is not fed simultaneously phase and zero, ie.е. 220В.

It is installed on one of the wires.

Also for this controller, there is no difference which side to make the input and which side to make the output. The strands are soldered and insulated with heat shrink.

After that, all the insides of the socket are assembled in the case and the whole construction remains to close the lid.

At this point, all modification of the carrier and the manufacture of the socket can be considered complete. In time it will take you no more than 15 minutes.

Soft starter controller for the machine with his own hands

Greetings, homemakers! And today we have a little do-it-yourself kit, which will make any homemade machine more convenient and safer. The author of this self-made device is AlexGyver.

It all started with the fact that the author began to use the drill stand more often as not always possible to drill a hole perpendicular to the surface of the workpiece. In this stand is a cheap drill without built-in speed regulator, and in the simplest case, to work this thing you need to clamp the trigger and put on the latch, and here it is in almost all drills.

And the problem is that the maximum RPM is too high even for drilling aluminum, not to mention stainless steel and other hard-to-drill metals and alloys. As for the convenience of switching on, you can leave the drill on the button and turn it on with the button on the socket. Convenience is questionable, and immediately give the maximum power is also not very cool neither for the motor, nor for the drill, nor for the construction of the rack. That is, it lacks soft start. And here if to take, for example, the self-made boring machine with the powerful motor and a heavy rotor, soft start is simply necessary for it. For controlling a non-three-phase motor, which is here, will be enough a triac and a simple circuit.

If you, like the author, do not like to solder, the Chinese have ready-made triac dimmers for 3 kW of power.

If you connect the drill through it, you get the speed control. The link to such a dimmer the author left in the description under the video (link SOURCE at the end of the article). It costs a pretty penny, much cheaper than assembling it by components in our stores. If you only want to put yourself a rack for a drill, it’s easier to take a drill with a power regulator.

At the very beginning, the author set himself a goal to assemble a device that will perform the following functions:

Smooth motor start, with adjustable acceleration time; 2. Acceleration to a set value, which is limited by a potentiometer, i.e. a knob; 3. You can change the RPM with the same dial while working; 4. The start will be from a logic button that has a voltage of 5V, which means the button will be safe for wet hands, and can be small and weak; 5. To start the machine, the button would need to be held down for a while. That is, a random click will not start the motor.

To build such a machine controller is possible on analog components, but unfortunately the author is not versed in it, and proposes to implement all these functions on a microcontroller. And of course the circuit will be 10 times easier. As a microcontroller we will have the arduino nano platform. It costs the Chinese 150.

Also this project can be run on a board Digispark, which costs 100. The circuit board works on 5V, you can power it from a USB charger for a smartphone, but the author is planning to make a compact device. So he decided to use this mini power supply.

Next we need a 10 kohm resistor and a pushbutton. And actually we need a power part, which will supply current to the motor.

The circuit can be soldered in 15 minutes on a breadboard. Also, especially for those who do not like to solder the schematic circuit, the Chinese have a ready-made board for the same circuit, but it is unfortunately huge and we will not use it.

And now we need to download the firmware and load it onto the board. At the link in the description below the author’s video go to the project page and download the archive.

Next, using the mega detailed instructions on the author’s website there, we load the firmware into one of the two boards. They work in exactly the same way. There is only one setting we are interested in in the firmware. it’s time to reach full power (in milliseconds).

Now let’s assemble the circuit and see how it all works. There are two schemes of course, for different boards.