How to make a do-it-yourself grinder from an angle grinder

How to make a grinder with your own hands

The device of the simplest grinder looks like this:

  • There are two movable rollers, one of which is connected to the motor rod;
  • A narrow sanding belt is pulled over the shafts;
  • As the shafts move, the belt spins for sanding and surface treatment.

make, do-it-yourself, grinder, angle

If we are talking about making a grinder with your own hands using an angle grinder, then, in this case, its design looks like this:

There is a small rectangular piece of metal (base) that is attached through the holes on the edge, in the place of the angle grinder where the protective cover is installed. A spike is welded on the bottom of the plate, on which a movable roller made of wood is located.

To tension the grinding belt of the grinder, a movable rail is attached to the upper end of the plate. A second roller of bearings is installed on it. The sanding belt is tensioned by means of a spring.

DIY grinder

How to make a do-it-yourself grinder from an angle grinder

Hello, all homemade products and just lovers of doing something with their own hands. In this jack of all trades article, we will look at the device of a homemade grinder from an angle grinder. The uniqueness of this homemade product is that the angle grinder will not need to be redone. Having made such a useful device, which will be discussed below, you can turn your angle grinder into a real grinder.

Materials and tools for manufacturing

To make a grinder with our own hands, we need to have:

  • A piece of thick sheet steel;
  • Metal corner;
  • A tight spring that will serve as a rail tensioner with bearings;
  • Two radial bearings;
  • Plywood, not less than 12 mm thick;
  • Hardware (nuts, washers and bolts).

From tools for making a homemade grinder, you will need: an angle grinder, a sharpening and drilling machine, glue, a hammer and pliers.

What is a grinder and why is it needed?

It is worth noting that the word “grinder” has several meanings. If we are talking about a tool, then a grinder, in this case, is a grinding machine that allows you to finish the surface and grind workpieces.

The grinder device is so diverse that there are machines from miniature sizes to huge ones. Everything here largely depends on the type of work and on the size of the workpiece itself.

The grinder can grind and trim the edges of products made of steel, glass, wood, porcelain and many other materials. This grinding tool is also actively used when removing paint, rust from a metal surface, etc.

The process of making a homemade grinder from an angle grinder

First of all, you will need to make a roller of wood or other material, which you can put on a sanding belt. The roller must be round, with the correct geometry. An elongated nut should be installed strictly in the center of the roller, which could be screwed onto the shaft of an angle grinder. Read about others homemade from angle grinder, on the site of DIY masters of all trades.

The second step, when making a do-it-yourself grinder, is cutting a rectangular base from a piece of metal. The base, as seen in the pictures, is attached with screws to the corner, which is designed to fix the grinder to the workbench tabletop or any other surface.

At the base, you will need to make a hole for the sanding belt roller and several small ones on the sides of it, to fix the base to the angle grinder. I think there should be problems with this, there shouldn’t be any. In order to be able to install the sanding belt on the grinder, on top of the base it will be necessary to provide a movable rail, with another roller of bearings, such as in the pictures.

On the side opposite to the roller, a hole is drilled in the plate for a spring, which will hold the sanding belt in a taut state. In this way, using an angle grinder, you can make a homemade grinder in just a few hours. The grinding tool based on an angle grinder has a fairly large power, so when using it you need to be extremely careful and accurate.

Features of homemade production

The design of the grinder is quite simple, which gives everyone a chance to create such a machine with their own hands. In this case, it is possible to expand the range of technological operations for grinding parts made of various materials. It should also be borne in mind that industrial equipment needs periodic maintenance, and you can easily cope with the repair of a homemade grinding machine without special tools and equipment.

To make a grinder yourself, you need to carry out preparatory work:

Since grinding is carried out both in the horizontal and in the vertical plane, it is important to design a machine that would have great functionality, so that polishing of any part occurs at the desired angle.

Why do you need a grinder?

With this grinder, you can perform the following operations:

  • eliminate small defects on any hard surface;
  • remove burrs (protrusions of glass and other materials after casting, stamping, cutting and other mechanical influences);
  • clean up the corrosive layer before further processing and painting;
  • eliminate the consequences of laser or plasma cutting;
  • remove flash, that is, excess material during casting;
  • eliminate defects in the welding process.

However, not everyone can purchase a factory-made belt sander for their own use. First, professional equipment is expensive. And secondly, an industrial grinder has large dimensions (in production it can occupy a separate room), besides, transportation will also cause a lot of difficulties. That is why a grinder from an ordinary angle grinder can be obtained, if desired, by almost everyone at home.

Anyone can create a belt grinder from a regular angle grinder with their own hands

The variety of modern devices and machines for construction and repair allows you to have a whole workshop at home. But not everyone lives in their own house, and not everyone has the opportunity to place such a workshop in a city apartment. Then savvy men use one device as another. For example, you can make a grinder from an angle grinder with your own hands.

Grinder is a belt sander designed for dry grinding of products. The product can be made of metal, artificial or natural stone, or other solid materials.

You can make a grinder yourself if you use certain drawings, as well as follow the recommendations.

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Manufacturing process

For the manufacture of power parts, metals with a thickness of more than 10 ml must be used. The base is made of even thicker metal. from 12 millimeters. You can connect the elements with screws and nuts, but you have to make many holes in the metal. Therefore, experienced craftsmen prefer to use electric welding for fixing base parts.

The greatest difficulty is the manufacture of a structure responsible for the rotation of the rotary mechanism in order to ensure the processing of parts in different planes. All grooves for turns are made using a milling machine, but if it is not there, you can use a drill or file.

To simplify the work, many use channels. If necessary, the pipes are grinded with an angle grinder. The structure of pipes and channels is attached to a metal base, after which four rollers are attached to it:

  • drive. 150 mm wide;
  • tension. about 100 mm wide;
  • two small. 70 mm (to guide the tape).

Experienced craftsmen advise using rollers made of titanium or duralumin, and the attachment for an angle grinder should be made of steel, since it is the largest. Finding a titanium blank of this size is very problematic.

There are craftsmen who create rollers from couplings for polypropylene pipes 40 mm in diameter and bearings 203. In this case, it is necessary to tighten the tape using a gas lift. It is important that all the rollers are on the same mowing line so that the tape does not come off. This largely depends on the strength of the fastening of all parts. The rotation speed can be changed using the speed controller on the Interskol angle grinder.

Grinders from Chapay

A variety of belt sander designs are now offered. Some are recognized as more successful, others are too difficult to implement.

Udany are the designs of Chapay grinders. The developer offers professional tools and home workshop versions. A significant advantage of these models is the wide range of machining angles. For this, the original design of the turntable was created. To expand the capabilities of the device, they are equipped with special disk mounts. Swivel bed made of two 12 mm metal sheets for high tool reliability.

In addition to professional units, Chapay developed mobile versions (ГЧ610-63 and ГЧ610-71). They are easy to use and have good consumer characteristics.

Of angle grinder

The simplest and most popular design is the angle grinder. The basis is the motor and electrical control circuit located on the machine. To make the abrasive belt move, a special nozzle is made. It consists of two shafts and a fastening system. To assemble a grinder from an angle grinder, you need to make individual structural elements yourself.

How the grinder works

The design of any belt grinder is presented:

  • electric motor;
  • a pulley with a fixed roller;
  • tension rollers;
  • rotary clamping mechanism;
  • abrasive tape;
  • basis.

To expand the functionality of the unit, some structures have additional elements that allow you to work with heavily soiled and even rusty surfaces. To carry out such operations, an abrasive disc is placed on the drive shaft of the engine.

A do-it-yourself grinder is assembled in the same way as a professional one.

The basic principle of operation is the driving of the abrasive belt using rollers. The main roller, which is the leading roller, is attached to the shaft, and the rest are secondary or driven ones. They have the ability to adjust, allowing you to change the degree of belt tension. To change the angle of inclination, grinders are equipped with a special mechanism.

The engine for the unit is selected based on the list of work to be done, performance and load. On industrial machines, an engine is installed, calculated according to the given parameters. It allows you to get the required belt speed and trouble-free operation over time. The value of the parameter is determined by the revolutions of the shaft and the size of the pulley. The optimal speed of the belt is considered to be about 30 m / s.

From a grinder

The most common version of the grinder scheme is one where a grinder is used as a motor. It is necessary to make a driving and driven shaft, a frame and a belt tension adjustment mechanism. A grinder from a grinder can be quickly made in a home workshop. The grinding machine fixed on the bed allows you to obtain a high-quality stationary grinder for solving problems of sharpening and grinding.

How to make rollers for a machine?

The rollers on which the abrasive belt is placed can be selected from ready-made samples. Most of them have to be done by hand. Sizes range from 70 mm to 150 mm and is determined by the width of the tape used.

  • Selected belt tensioning mechanism.
  • Dimensions of each roller.
  • Material and fastening methods are selected.

The most affordable materials for the manufacture of rollers for a grinder are wood or plywood, pvc blanks, bearings. For the manufacture of rollers from pvc pipes, a blank is selected with an inner and outer diameter corresponding to that indicated in the drawing. The main disadvantage of the roller is that the temperature rises at high speeds. Therefore, the polypropylene roller may lose its original shape.

The production of rollers from bearings is reduced to the selection according to the inner and outer diameters. Professionals advise to choose bearings of at least the sixth grade.

Sometimes wood is used. You can make do-it-yourself rollers from plywood. The design will come out light enough.

The main condition is that the loop of rotation of the tape must be reliable and durable. The tension roller must have an adjustment mechanism that provides the required degree of tension.

All videos are placed vertically. Even a slight change in relative position will cause the tape to break.

Rotary table device

Expanding the capabilities of a homemade grinder can be achieved by making a turntable. It will allow you to process more complex products and increase productivity.

To do this, you will need to make a turning mechanism. When developing, it must be remembered that the bed must be swivel and must ensure reliable fastening of all mechanisms.

Step-by-step manufacturing instructions

Stage 1. Device case

  • an angle grinder will be used as a drive;
  • pipe 15 mm with a square profile;
  • 4mm metal strip.
  • We fold the metal strip under the diameter of the grinder.
  • Let’s start welding. We press the bezel to a flat surface and put a square with a side of 2 cm at a right angle.
  • Checking the corners, picking up and scalding.
  • You can clean all the seams, but this step is not necessary.
  • Now, in the place where the clamping ring is tightened, we cut a thread with a diameter of 4 mm. Kernim and drill.
  • Using an angle grinder, cut the workpiece so that the clamp can be crimped.
  • On the other side, we drill a hole for the bolt so that it can freely enter from this side, and screwed into the other.
  • Trying on the case. If nothing dangles, continue.
  • At this stage, you will need a lead video. We weld the profile pipe perpendicular to the roller, having previously determined its middle.
  • We clean and grind.

Stage 2. Lead video

We make small notches on the nut. This is necessary for the carboxyl resin to get into them and better hold the nut during rotation.

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We dilute the resin and fill it. We glue the reverse side with masking tape, otherwise the glue will leak out.

We carry out processing only after a day. Using the rasp, we begin to shape the roller.

Clamp the angle grinder in a vice and continue. First, we make the roller semicircular, then we grind it until the desired shape is obtained.

Step 3. Roller with tensioning mechanism

  • We take as a basis a metal square with sides of 12 mm. It will fit this profile pipe.
  • Cutting off unnecessary details.
  • We put a piece of pipe on the edge of the square and scald it. A bearing will be fixed in it, which acts as a roller.
  • We drill a hole with a diameter of 8 mm for the bearing shaft and shorten the part.

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  • Now we cut off 2 walls of the profile pipe to fit the bearing.
  • After the cut, we process everything with a file.
  • An 8 mm drill is suitable as a shaft. We insert the shaft into the roller and grab.
  • After making all the parts, you can proceed to the assembly. Insert the roller with the tensioner and put on the tape.
  • The flat stop is missing. We expose an emphasis under the tape and you can grab.

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Homemade mechanisms for angle grinder

In order not to look for ready-made nozzles, you can try to make them yourself. There are different options for making such devices, which will be discussed below.


First of all, consider the option of how you can make a simple grinder from an angle grinder with your own hands. The simplest version of the grinder is obtained from an angle grinder, two rollers, a tensioner and a plywood base.

For manufacturing, you need thick plywood. this is an affordable and inexpensive material.

The hardest part of this design is making the rollers. It’s good if your home workshop has a milling machine or hand router. To do this, a suitable workpiece is milled out of plywood by a milling cutter, processed on a grinding machine, bearings are pressed in.

A base is cut out of the same plywood, in which a hole is cut for an angle grinder. Places for the rollers are marked, after which the angle grinder is fixed and the wheels are mounted. Previously it is necessary to treat the polished wheels with varnish. After that, the entire system is assembled, and the angle grinder is ready for use. The design of the device is clear from the presented photograph.

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From the remnants of a professional pipe

With the skills of a welder, you can easily convert an existing angle grinder in your home workshop into a grinder. It is enough for this

  • weld trims of a corner or square pipe in the shape of the letter y;
  • fasten suitable rollers at the ends;
  • screw the drive shaft to the shaft of the angle grinder;
  • mount the sanding pad and the device is ready for use.

With this grinder, you can perform various operations:

  • clean up the unevenness of the metal after welding;
  • complete grinding of the part;
  • handle wood products;
  • make final, finishing, processing before coating the part with varnish;
  • handle uneven concrete walls.

To sand or sand various surfaces, you should select a sanding cloth designed for the material being processed.

Homemade angle grinder

When performing repair work or making furniture, a specialist simply needs to have a device such as a grinder, which allows him to grind various materials. And when performing welding work, such a mechanism is simply irreplaceable. To buy this device in your own workshop is the desire of any master. However, an industrial sander is quite expensive. And having it without doing it professionally is expensive for the family budget. That is why there is a desire to make it with your own hands from the mechanisms available at hand. An angle grinder is best suited for these purposes: it can be easily transformed into the necessary power tool.

Sheet metal

If the workshop has a welding machine, and a familiar turner will grind the necessary rollers, then you can make a polishing machine from the remains of metal.

For this, the remnants of thick sheet metal, which will be used to make the base, are well suited.

Such a device will be no worse than the factory one. It will take a lot of time to make, but it’s worth it. Before starting work, it is necessary to develop working drawings or download them from the Internet. Assembling the mechanism not according to the drawings, you may not achieve the desired result, or the resulting device may turn out to be source of increased danger.

First of all, it is necessary to make an accurate marking of the bed. As an example, we use the following device drawing:

The arrow indicates the diameter, which must be specified depending on the angle grinder used in this design.

Drill holes on milling and drilling machines according to the marking. Then you need to prepare a tension bar, as shown in the photo.

Carve the rollers, and only then proceed with the assembly of the mechanism. The result is a universal attachment, as a power unit of which you can use not only an angle grinder, but also another suitable electric motor. The finished view is shown in the photo below.

Finished attachment for angle grinder

The simplest thing is to purchase a ready-made sander and mount it on an angle grinder. The photo shows that the installation of the mechanism is not particularly difficult. It is enough to attach the bracket with rollers to the angle grinder after removing the protective cover. The drive wheel is attached to the shaft of the angle grinder. The sandpaper is put on the rollers, and the sander is ready to work.

For convenience, you can fix the device to the table using clamps.

Reducing costs, but at the same time limiting the possibilities of using the grinder, allows the attachment, consisting of a bar with two rollers. The device allows you to make a grinder from an angle grinder in a matter of minutes. The attachment has a standard mount, suitable for mounting on an angle grinder.

The design of such a mechanism is intended for cleaning welded seams. It is quite difficult to polish wooden products with such a gadget. However, if it is rigidly fixed on the table, it can be successfully used as a sharpening machine for dressing cutting tools or sharpening knives, axes, etc.

Such a device is also produced by the industry, but it is extremely rare to find it on sale.

Safety engineering

When working with a homemade grinder, safety precautions and personal protective equipment should not be neglected. Persons under the age of 18 should not be allowed to work. When using the device, it is imperative to use protective glasses and earplugs to protect the organs of sight and hearing from the harmful effects of external factors. We should not forget about the mask that protects the respiratory system from dust.

In the video below, you can study in detail how and from what to make a grinder. It also gives all the main dimensions of the parts of the mechanism.

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Wood shredder

The shredder of branches and grass is a garden device that allows you to turn small branches and thick-stemmed weeds into a small-fraction form used for various agricultural purposes. When making such a tool, it is worth using only a large angle grinder operating at high speeds. To prevent overloads and breakage of the angle grinder, an additional gear system is used, which greatly increases the grinding effect. The device is mounted on a sturdy metal frame that can withstand high vibration and displacement loads. Such a device is shown in the photo below.

Grain crusher

The grain crusher is made of a round drum (from a broken or old crusher) with a perforated removable bottom, a plastic vent (from a conventional canister with a cut off bottom) and an angle grinder. the leading structural element. The angle grinder shaft is placed in the drum through the hole in the center of its top. In this position, its body is attached to the drum (the method of attachment is individual). A screw-shaped knife is attached to the gearbox shaft from the inside of the drum. It can be made from a circular saw cut-off wheel for wood. The knife is fixed with a fixing nut.

A plastic grain hopper is also installed in the upper part of the drum body. Through it, grain is fed, falling onto a rotating knife. The latter is crushed and poured out through the bottom perforation. The size of the grinding fraction depends on the size of the holes in the bottom. The photo below shows a model of a homemade grain crusher and drawings for its manufacture.

What else can you make?

The design of the angle grinder allows you to modify it yourself into many other tools.


A lathe for wood from an angle grinder is one of the most difficult ways to modify the latter. For its manufacture, a large number of materials and various components are used. An example of construction is shown in the photo below.

Homemade miter saw

Any model and size angle grinder can be retrofitted into a miter saw. A miter (pendulum) circular saw is an electric tool (rarely battery), used only in a stationary form for cutting workpieces from various materials at an acute and right angle. The differences between such a saw and others are in the high accuracy of cutting at a given angle and maintaining the integrity of the cut edge.

You can make an installable structure with your own hands that will allow you to use an angle grinder as a miter saw. To assemble the simplest modification, you will need to prepare:

  • wooden blanks. a sheet of fiberboard, corresponding to the size of the future working surface, various bars (it is possible from the same fiberboard);
  • wood screws;
  • bolts and nuts;
  • regular piano door hinge.

Tool required to make a miter saw:

  • jigsaw or hacksaw;
  • drill or screwdriver;
  • two drills. 3 mm and 6-8 mm;
  • plastic tightening clamp.

Build process. The future pendulum frame of the miter saw should be positioned on a firm, level, non-wobbly surface. A workbench table or a separately assembled structure can be used. The height of the plane on which the product will stand must be sufficient for comfortable work. The miter saw blade is always positioned at the edge of the table or workbench. This fact is taken into account when assembling a homemade miter saw.

The size of the working plane of the machine is determined by the size, weight of the angle grinder and the purpose of its use. For an angle grinder of the smallest size, a sheet of fiberboard 50×50 cm is suitable.It must be fixed on the workbench so that one of its edges protrudes 15 cm above the floor. A rectangular cutout is made in the middle of the protruding part, designed to lower the cutting element of the angle grinder into it. The width of the cutout varies from 10 to 12 cm, the length is 15 cm.

On one side there will be a machine operator, on the other. a piece of a piano loop 5-6 cm wide is fixed. The canopy, like all other wooden parts, is fastened with self-tapping screws. To do this, a 3 mm hole is drilled in the workpiece. this is necessary so that the self-tapping screw does not destroy the wooden material. Another hole is drilled in the same hole. 6 mm in diameter and 2-3 mm in depth. a sweat for the head of the self-tapping screw, which should not protrude above the working plane.

A bar or a rectangular piece of fiberboard is screwed to the moving part of the loop. Another workpiece of a similar profile is attached to it at an angle of 90 degrees. the part on which the angle grinder will be fixed. In this connection, you can use a reinforced mounting angle. this will reduce the backlash of the structure and eliminate the occurrence of errors when cutting.

The angle grinder is attached to the last bar from the bottom. To do this, a hole is drilled in it with a diameter equal to the diameter of the threaded hole in the angle grinder. A bolt of the appropriate diameter and length is threaded into it. Any inconsistencies in frame size and angle grinder are compensated for with additional washers, grovers, spacers. Its gearbox must be set in such a way that the direction of movement of the cutting disc is directed towards the operator of the machine.

The back of the angle grinder is pulled to the support bar by a plastic clamp. The start button must remain accessible for emergency shutdown of the power tool. A 5×5 cm wooden bar is screwed to the plane of the working area, designed to be used as a stop for cutting a workpiece made of wood or metal. Its presence will ensure smooth cutting and no beating of the material. The design in question upside down and with a fixed angle grinder can be used as a homemade sawmill. Depending on the intended purpose, it is possible to manufacture a portal frame for an angle grinder.

The above model of a miter saw based on an angle grinder is shown in the following photo.

There are also more sophisticated modifications of the angle grinder to the miter saw. Factory variations are also available.

What can be done from an angle grinder with your own hands?

  • Basic tools and materials
  • How to make a grinder from an angle grinder?
  • Homemade miter saw
  • What else can you make?
  • Safety engineering

Angle grinder. angle grinder. works due to a collector electric motor that transmits rotational mechanical force to the working shaft by means of a gear unit. The main purpose of this power tool is cutting and grinding various materials. At the same time, it can be used for other purposes by changing and improving the design characteristics. Thus, the functionality of the angle grinder is expanded, and it becomes possible to perform previously inaccessible types of work.



This is a tool that is designed using a benzoin trimmer, or rather, a gimbal. The principle of its operation is preserved. only the driving unit and the cutting part itself change.

Instead of a line for cutting grass, a chain saw bar mount is installed.