3 ways to make your own sander

Final part

Making a grinder attachment for a grinder is not an easy and time-consuming job. However, if a home craftsman has such a device, it will not lie idle. Indeed, in addition to grinding hard-to-reach places, such a nozzle will help, for example, choose a groove in the end of the door. And it's much easier to grind small parts on it than on tape machines. And for manufacturing, you will hardly have to purchase anything. Well, maybe a bearing. This means that this is additional savings that a home craftsman can achieve with his own hands.

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How to make a sander

You can make a simple typewriter from your PC's hard drive. To do this, you will need the hard drive itself, an abrasive, a PC power supply. It will be designed to work with small details. When disassembling the disc, glue the abrasive onto the rotating surface. After that, the structure must be connected to a power supply unit (power supply), and then the entire structure must be fixed on the working surface of the table, equipped with a speed controller and a switch.

Do-it-yourself wood sander

Grinding machines are represented by the following types:

• eccentric or orbital;
• vibrating;
• corner;
• tape.

When making a typewriter, you will need:

• electric motor;
• power supply.

The power unit must be taken from household appliances, for example, from a fan, the power supply is a computer, the battery is a household one. As a basis for the above elements, a wooden board is suitable, on which the battery with an electric motor should be fixed with screws. The "start" button must be attached to the base with self-tapping screws. Wire strands are fixed with industrial staples.
The working part of the tool is a grinding wheel, which you can purchase yourself. The abrasive disc will be driven by an electric motor using two bushings.
You can strengthen the design of the device if you take a motor from a washing machine as an engine. In addition to polishing discs, in this case, grinding and abrasives can be installed on the tool.

Homemade belt sander

A grinding belt made of abrasive acts as a working element in this type of device. A self-made machine will be stationary, and have large dimensions compared to an industrial design. To make a sample, it is best to use a power unit with a capacity of 2-3 kW and a rotor speed of 1500 rpm.
The radius of the drive drum directly affects the speed of the belt. The larger it is, the higher the speed of the belt. A self-made design will not allow adjusting the belt speed, however, the tension force can be influenced by displacing the fixed axis of the tension shaft attached to the motor shaft relative to the desktop.
The sander's workbench should be made of wood or metal. A sander belt can be made from abrasive paper available from a hardware store.
The working element, which is an emery belt, is driven by a transmission and drums by a power unit. Shafts are divided into master and slave.Drums can be made using chipboard sheets, turning them on a lathe so that the result is discs about 20 cm in diameter. One thing to keep in mind when machining is that the edges of the rolls must have a larger diameter than the center in order to automatically hold the tape. The dimensions of the rack will depend on the width of the tape and the distance between the shafts. At the location of the shafts in the web, it is necessary to make slots for the smooth passage of the belt.

How to make a mini sander with your own hands

First, you need to find some Styrofoam to prepare the base for the device. After that, you need to cut a hole to install the switch in it. Then you will need electrical tape and a power source, for example, the famous Krona battery. We fasten the battery (Kronu) to the foam base with electrical tape. We take the cork from under the champagne and the core of the handle. We cut the rod to the desired length, then put the handle rod on the cork with a blunt end and insert the tip of the rod into the hole for the motor shaft. After that, you need to cut a strip of abrasive tape with scissors to fit the size of the cork. After you cut the tape, stick it around the cork around the circumference. This cork construction will be the working part of the machine. We carefully inspect all the wires and connect them with twists, insulate the connections with electrical tape. We are trying to launch the resulting device. Now you have your own mini car. Such a device is useful for performing simple small jobs for which an ordinary grinder would be too large and inconvenient. If you are an observant and patient, as well as a diligent person, making a sander with your own hands is not at all difficult. To do this, you only need dexterous hands and a little patience.

About prices

If we calculate the approximate cost of the entire volume of work, then the automotive centers for polishing will announce the price of 150 USD. The price will include polishing with all the tools offered by the center. It is not always possible to be sure of an excellent result when giving a car to the wrong hands. Moreover, many of these services are not responsible.

Work done with your own hands will cost much less. On average, a can of polishing paste in an authorized store will exceed the cost of $ 15. One can is enough for five cars. will cost 5 USD If you don't have a grinder or a polishing machine, you can take it from friends or rent, in extreme cases, a drill with the ability to adjust the speed will do. As a result, the total amount will be no more than $ 30. In addition to significant savings, there will be confidence in quality work done with your own hands.

Homemade mechanisms for angle grinders

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.

Plywood

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

The hardest part about this design is production of rollers
... It's good if your home workshop has a milling machine or hand router. To do this, a suitable workpiece is turned from plywood by a milling cutter, processed on a grinding machine, and bearings are pressed in.

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

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.

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 a source of increased danger.

First of all, you need to make precise marking of the bed
... As an example, we use the following device drawing:

On milling and drilling machines for drill holes in the marking. Then you need to prepare 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 a grinder, but also another suitable electric motor. The finished view is shown in the photo below.

From the remnants of a professional pipe

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

• weld trim angle or square pipe y-shaped
  ;
• 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.

How to do it?

When all the constituent parts are prepared, you can start directly to work. First you need to make a bracket for the grinder. It serves to securely hold the tool. The bracket is made of steel plates. They must be firmly clamped in a vice and bent in the shape of the grinder. Then the resulting sheets are welded to each other. In addition, adjusting bolts can be installed on the bracket, which will allow you to change the angle of the tool.

Then you can start making the driven wheels. In total, there are two of them in the design. This will require bearings and bolts. The bearings are bolted and secured with a nut. On top of it all, you can attach a rubber hose for smoothness. Next, you need to make a work plane. The product will rely on it when working on a future belt sander. The working surface is made of steel plates that are welded together.

It is worth preparing the foundation for the entire structure. For her, you will need a square pipe. It is necessary to drill holes in the pipe on which the bracket and grinder are attached. It is recommended to secure them with bolts and nuts. Then the work plane is attached. Everything is carefully welded. Next, you need to make the main drive wheel. A short rubber coated metal tube can be used for it. Such a pipe is firmly attached to the angle grinder shaft with a nut. Then a spring must be fixed between the base and the bracket, which will tighten the belt of the sanding belt.

Then you can install the sanding belt itself on the device. This device should be securely fixed at a convenient work place and you can start testing

It is imperative to tighten the belt so that it is centered on the drive and driven wheels.

Making a grinder from a computer hard drive + (Video)

Any old hard drive can be converted into a miniature sander. To do this, follow these steps:

• completely disassemble the hard drive and remove from the case everything that is located to the left of the magnetic disks;
• cut out the working circle from sandpaper, make a hole for the spindle in the center of the circle;
• stick several strips of double-sided tape on the rotating disk of the hard drive and fix sandpaper on it;
• make a protective screen that protects the eyes from the possible departure of the manufactured emery disc;
• connect the finished structure to the power supply from the computer and use.

Of course, this design does not have high power, but it is quite possible to sharpen a small knife or scissors.

Often there is a need to perform various kinds of finishing work on a wooden surface.

The use of such a unique tool as a wood sander helps to significantly speed up the execution of this kind, as well as improve their quality.

She is in rather high demand among buyers. That is why I would like to dwell in more detail on the features of this instrument, as well as its varieties.

The popularity of such equipment is due to its rather wide area. By using a sander for woodworking, you can perform the following types of work:

• Curved plane polishing
• Leveling a flat surface that is on a stationary work table or by manually moving it mechanically
• Processing the edge of various parts or their ends
• Preparing a wooden surface for painting, etc.

All these and other types of work often have to be performed in a country or private residential building.

In addition, a wood grinder is simply an indispensable tool for craftsmen who work with wood surfaces and blanks.

In addition, when choosing equipment, it is necessary to pay attention to such an indicator as the grain size of the abrasive belt. In order to be able to perform different types of work, experts recommend taking several types of tape with a different grain size when buying a machine

Vibrating

The design of this type of equipment consists of a body and an abrasive element, which is attached with strong clamps.

Grinding is carried out as a result of the frequent oscillatory movement of the worker.

The master can set the amplitude of movement independently in manual mode.

This indicator ranges from 1 to 5 mm.

The smaller the amplitude, the more accurate and finer the working surface will be processed.

Delta sander

A distinctive feature of this is the presence of a work sole in its design, the shape of which resembles an iron. Using this equipment, the master has the ability to work with all types of surfaces.

Different machine models have different operating speeds. The popularity of such a tool among buyers is significantly increased by the fact that its working surface can be turned in different directions as needed, as well as to replace different nozzles. Thanks to this, the use of equipment increases several times.

Eccentric

The main difference between this type of tool and others is that it is designed to perform jewelry processing of the working surface. The abrasive surface is circular.

The master can independently choose the degree of surface graininess. The subtlety of the work performed depends on this indicator. The sole of the equipment is equipped with small holes through which dust is removed.

Thanks to this, working with such a tool ensures the safety of the master. It is also of great importance that the master can choose the speed with which the sole of the machine with the abrasive surface fixed on it will rotate.

Making a grinder with your own hands

It's no secret that it is quite difficult for a home craftsman to do without such unique equipment as a wood sander.

Despite the seeming complexity of the instrument, a do-it-yourself wood grinder is a reality.

It is possible to simply make a tool from a conventional computer power supply, which has already failed.

First, you need to prepare all the parts and tools necessary for work:

• Power Supply
• Old computer disk
• Abrasive surface
• Bolts or screws
• Speed ​​controller
• Switch

The assembly sequence is as follows:

• Disassemble the power supply so that only its twisting part remains.
• Attach a computer disk with an abrasive surface attached to it with glue (the abrasive material can be fixed permanently, or you can make small clips. Thanks to this, the master will be able to change the surface as it wears out)
• Connect the power supply and speed controller.

This is how you can make a simple grinder at home. It can be used to work with small work surfaces.

Such equipment can also be made from a simple grinder. It is enough just to change the abrasive disc. But it should be borne in mind that the speed of rotation of the abrasive element of such a machine will be quite high.

Often, craftsmen adapt a conventional drill in such a way that it can be used as a grinder. To do this, you need to use a special nozzle.

An emery cloth is attached to its working part. And on the opposite side, a small shank is inserted.

It will be necessary in order to be able to connect this bit and the drill chuck. With the help of such a tool, rather large surfaces can be processed, not only made of wood, but also of metal or plastic.

Types of structures for the grinder

Design options

There are several types of grinder racks. They differ in location and assembly time. The first type is the bed, under which the angle grinder is fixed.

The working surface is represented by a cutting disc. In this case, cutting a metal profile will be similar to cutting wooden elements with a circular saw. This lathe design is not very popular due to the need to move the workpiece. The cutting process in this case becomes unsafe. But there is also a clear advantage - it is fast cutting of thin metal sheets.

The second type is a grinder made of a grinder with a frame. This type of tool can have different fastening designs. But they must all be reliable. You can fix the grinder to the bed by bolting in place of the handle. You can fasten the grinder to the rack with bolts on the protective casing, in which you can pre-make holes. This version is considered to be the simplest, most convenient and does not require many details.

You can also attach the angle grinder using the pendulum saw method. This method assumes the immobility of the workpiece, and only the circle rotates. The pendulum saw is positioned above the table top. This allows you to trim the object at the desired angle. With this method, working with the grinder becomes safe and quick, since the grinder is located on top. It is possible to use the grinder at any time for ordinary purposes.

The essence of the pendulum saw method

A pendulum lathe using a grinder is easily assembled at home. Such a homemade product has a simple mechanism of operation. Main components for manufacturing:

• Rack
• Pendulum
• Fastening

A steel frame with a sheet metal platform can be used as a stand. Attach a bracket to such a surface. To it, mount the saw hinge and the stop for holding the workpiece.A rotary mechanism is considered a good stop to change the angle between the workpiece and the disc. Do not forget that it is worth making a hole for the cutting wheel in the tabletop. The width of the hole corresponds to twice the thickness of the circle, and the length corresponds to the diameter.

A T-shaped part is used as a pendulum. Such a part is fastened to the frame bracket and the part that is designed to fix the grinder. The pendulum mechanism is provided by rolling bearings or the use of a sleeve.

A console with one or two brackets can be used to secure the angle grinder. The tool is fixed to the body and in the place of the gearbox, where there are special holes.

For convenient operation, it is possible to connect to a switch, for example, a pedal.

The fundamental structure of the grinding machine

Without thorough knowledge of the construction of grinding machines, it is impossible to assemble a high-quality device with your own hands. Before moving on to the structure, let's get acquainted with the most common types of grinders:

1. Corner. Simply put, a Bulgarian. Disks are consumables. Grinding wheels are intended for surface grinding. The pressure is adjusted manually.
2. Tape. Surface treatment is done with a sanding belt. Suitable for work on flat surfaces only.
3. Delta sander. For processing products with a curved structure.
4. Vibrating. Ideal for finishing smooth surfaces.

In addition to the above, there are several more devices that are less common:

• straight;
• polishing;
• eccentric.

1. Drive unit. The performance of the device depends on its power. In devices assembled by hand, an electric drive is used, however, there are pneumatic homemade products powered by a compressor.
2. Reducer. Transfers the torque from the drive to the working tool. The basic part of the gearbox is the spindle.

1. Working platform. An abrasive material is attached to it. To do this, you can use circles, tapes, discs.
2. Frame. Protects the structure from mechanical damage and dust, so many factory models are equipped with dust collection systems. The materials used to make the device with your own hands, as a rule, are not able to compete with high-quality polymers that are used in the manufacture of professional tools.
3. Control system. Includes power off as well as abrasive speed control.

Materials needed:

• extended nut М12;
• a piece of wood, a block with a thickness corresponding to the width of the tape;
• two-component epoxy adhesive;
• wide metal strip with a thickness of 5 mm;
• steel corner 50 x 50 mm;
• bolts M6;
• bolts М10;
• nuts М10;
• bearings 3-4 pcs;
• spring.

The photo below shows the process of making a homemade grinder.

First, you need to make a drive roller to rotate the tape. It can be drilled with a crown with a diameter of 40-50 mm from a bar or board.

Please note that the roller width must be equal to or greater than the tape width. On the one hand, its central hole must be drilled out and pressed into it with epoxy glue, an elongated M14 nut.

When the glue hardens, the roller is installed on the grinder shaft. Next, you need to turn on the angle grinder and grind the roller, pressing it against the sandpaper. You need to give it a barrel-shaped shape, slightly pinching the edges and leaving the center diameter. In this case, the tape will then fly off.

The grinder frame is cut from the strip or steel plate. Its dimensions will depend on the length of the selected sanding belt standard.

In the bed, we drill a hole with a diameter of 40-45 mm. The grinder gearbox will be inserted into it and the shaft will be removed.

4 mounting holes and 2 grooves on the side are made in the bed so that when docking it does not interfere with the screws pressing the gearbox to the angle grinder body.

The stand can be made from two corners.In the corners, you need to make holes at the bottom of the stand to screw the machine to the table. Having fixed the bed, you can also try on the grinder, but the standard screws on its gearbox must be replaced with elongated ones.

We will make a lever for tensioning the tape. In the center, the lever is attached to the bed with an M10 bolt with a nut.

At the end of the lever, a second M10 bolt is placed, pressing 3-4 bearings. It is necessary that the width of the group of bearings corresponds to the width of the belt. They will act as a driven tension roller.

Install the spring for the sanding belt tensioning mechanism.

An adjustable stop plate is cut from the corner, as in the photo. It must have a groove to be able to change the position when clamping.

Also, a work platform is made from a steel plate and a small corner. On its corner, you also need to make a groove to be able to adjust the position.

The stop and the working platform are screwed to the bed with M6 bolts. After tensioning the sanding belt, the machine can be used for its intended purpose. It can perform exactly the same tasks as a factory grinder. If not needed, the machine can be disassembled and folded compactly. The grinder used with it does not undergo structural changes, therefore it can still be used for its main purpose.

The process of making a grinding machine is also shown in this video:

Making a belt sander with your own hands + (Video)

It is not at all difficult to make a belt sander yourself, you must complete the following steps:

• select suitable materials and parts;
• make a solid foundation for fixing the tool;
• install a suitable countertop;
• fix the vertical struts with a tensioner and a drum;
• mount the motor and drums;
• fasten the sanding tape.

To process fairly large parts and elements, it is necessary to make a large copy of a serial grinder. For example, if you take an electric motor with a power of 2 kW or more powerful with a rotor speed of 1500 rpm, then the gearbox can be omitted. The power of such an engine is quite enough to rotate a drum about 20 cm in diameter and process parts about 2 m.

You can also use an electric motor from an old washing machine. In this case, the frame is made of a thick sheet of iron, preparing a place for installing the motor and carefully fixing it with bolts to eliminate vibration. The design of such a machine consists of 2 drums, and one of them is fixed, and the second can be pulled and rotated on bearings around an axis. It is advisable to make the basis for the machine from metal or several sheets of thick plywood. Drums are made on a lathe from chipboard. The tape is cut from sandpaper sheets with a width of about 20 cm and fixed on the bed. The larger the table size, the larger the parts can be stacked and processed in the future. Drawings of finished products can be found online.

It will take

To make homemade products, we will need quite affordable and inexpensive materials:

• different metal (corner, profile pipe, strip);
• threaded parts (nuts, washers, screws, bolts, hairpin);
• tension and compression springs;
• a bolt with a plastic head-handle;
• aluminum cable sleeves;
• bearings;
• enamel for rust.

Some operations can be performed manually, but the work will go faster and easier if you have:

• grinder with cutting disc;
• drilling machine;
• welding equipment;
• drill with drill and countersink;
• square and pencil;
• caliper and tape measure;
• core and hammer;
• metal file;
• tap, screwdriver and keys.

Conditions for making the bed

To make an emery device from an angle grinder, you will need:

• Bed material - metal tube or metal plate
• Counterweight spring
• Bearings for forming rotation
• Durable material for a solid base
• angle grinder

To get more reliable and versatile equipment, it is better to make a homemade machine from a grinder using a small tool. You need to choose the one that deserves trust in the market. Choosing an unreliable device will incur additional costs if the model fails. A homemade rack is designed for a specific model, and a new one may not fit.

Before making a lathe, you need to draw a diagram of the device in order to calculate the parameters and structure of the installation. Manufacturing recommendations:

• When designing the swivel unit, the length from the swivel joint to the disc should be made small so that the machine is stiffer and more accurate.
• In the role of a support, where the bearings are pressed in, which ensure the rotation of the pendulum, you can use factory bearing modules or pieces of steel pipe with a circumference equal to the outer cage of the bearing.
• When pressing the bearing modules onto the shaft, make a tight connection without the possibility of loosening to prevent displacement.
• After installing the grinder, a test run is performed to evaluate vibration actions and backlash.
• For accuracy when working with a lathe, you can install a ruler on a stop bar, which will ensure the production of sections of the required length.

The cut-off machine will be a useful tool for any craftsman. A hand-made grinding device will meet your needs and working parameters. In the future, such a device will save time and allow precise locksmith work.

Grinder tensioning mechanism, and how it works

Now you can proceed to the third part of the grinder - the tensioning mechanism. To do this, you will need just a profile pipe 15 × 15 mm and 20 × 20 mm, as well as a bearing. First, 2 small sections of shaped pipes of different sizes are welded in length. After that, a hole with a diameter of 8 mm is drilled in the larger part.

PHOTO: youtube.com

The thicker side is trimmed slightly above the holes, and its entire side parts are sawn lengthwise. You should get a groove into which the bearing will easily pass. Perhaps, in words, everything seems complicated, but in fact, these are elementary actions.

PHOTO: youtube.com The grooves for the bearing have been cut out, it remains to process them a little

As a result, the bearing easily falls into place, and after fixing with the drill shank it rotates easily, which is what is required at the moment. Now you need to align and cut the drill flush with the metal and grab. One welding point per side is sufficient.

PHOTO: youtube.com The bearing rotates perfectly on the shank of the Chinese drill

Assembling the grinder tensioning mechanism

The only thing left is to install a spring in a thicker profile pipe, and then a thinner element. You can choose any spring. The only condition is that it should not be too harsh. Otherwise, the tape will simply break.

PHOTO: youtube.comPHOTO: youtube.com After installing the tension bearing, you can install an emery tape

As blades for a grinder, you can use worn-out belts of an ordinary sander. They often tear in stripes when hitting a nail or other hard object. For a grinder, such strips are no longer suitable, but for a mini-grinder they will be just right.

PHOTO: youtube.com