DIY wood sanding machine. How to make a universal sanding machine for wood Do-it-yourself disc sanding machines

All materials in any production, in addition to manufacturing, require additional and finishing. Vivid examples of such treatments include grinding and polishing the product. These two types of mechanical impact on the surface of the part bring it appearance to perfection. However, everyone knows that performing these operations by hand will take a lot of time and effort, and even processing can only be ensured by a very experienced craftsman. To facilitate this kind of work, people have come up with various devices and mechanisms to help them. Some of them will be discussed further.

General purpose and types of machines

The machine is intended for final processing of parts and blanks from different materials by exposing them to an abrasive or diamond-coated surface. The machine, its component mechanisms and devices make it possible to maintain the accuracy of size and shape, and also ensure the creation ideal surface parts or workpieces.

Using the machine, you can process flat parts, surfaces outside and inside, parts of various geometric shape, grind or polish threads and gear teeth. According to their characteristics, grinding machines are divided into:

Cylindrical grinders.
Internal grinding.
Centerless grinding.
Surface grinding.
Special machines (for grinding threads, gears).

Grinding process

Grinding is the process of removing the top layer from the surface of a workpiece using abrasives or diamond chips. They are collected into a total mass of work surface and held together with a binder. They ultimately form a grinding wheel or belt.

During operation, the abrasive surface is driven in a circular motion using an electric motor. When the surface of the workpiece comes into contact with the abrasive, the processing process occurs. There is a common belief that grinding with abrasives is friction processing. However, this is not true.

Each abrasive particle has sharp edges; when it touches a material (metal, plastic, wood, stone) it works like cutting tool and removes chips, like say a milling cutter or drill. Considering the considerable rotation speed grinding wheels, as well as the occurrence of chips as a product of grinding, it is necessary to take into account the possibility of injury from these very chips.

Safety precautions during operation

When working on the machine, you must comply following rules safety precautions:

Necessity at work and at home

Today at production workshops Grinding machines are used constantly. Depending on the scale of production, either one machine or all its varieties in complexity and size can be installed.

However, there is always a use for this equipment in everyday life. Some have a workbench in the garage emery machine for metal processing. Others have several wood grinding machines of different designs installed in their workshop. Still others own a universal, combined machine. There are power tools for manual grinding: drum type, belt grinder, band saw, small machines or large machines. And they are all in demand.

The market offers a fairly wide range of all kinds of similar equipment from many manufacturers. And their prices are quite reasonable. But these are cars general purpose. And if a person runs his own business, or has a hobby, then he needs a specially specialized machine. Here the price has already increased several times.

For this reason or based on own desires Many craftsmen make homemade products. Mainly for processing wood, plastic and metal, less often for cutting and grinding stone. And, in general, this is correct. After all, even simple sharpening kitchen knives It’s easier and faster to do on a machine than by hand using a whetstone. The blessing of creating with your own hands homemade machine Its very simple design is suitable for wood.

Grinding machine It’s not difficult to assemble it yourself for a tree. People also simply call it emery.

The main component is the engine. Surely many people have an old one on their farm. washing machine. Its motor is quite suitable for this purpose. If not, a new engine on the market will be quite expensive, but at any flea market you can find a used one in working condition. The electric motor must be strong from 750 W to 2 kW, not high-speed from 1500 to 3000 rpm, if three-phase, then you can always adapt it to 220 V. You will also need thick plywood, self-tapping screws, PVA glue, and tools, of course.

The task is simple: make a hard drive on which to stick sandpaper. To do this, draw a circle with a diameter of 150-170 mm on plywood; if the plywood is thick enough to hide the clamping nut, one piece is enough. If not, glue two identical pieces together with PVA glue. The motor spindle clamping nut must be recessed into the disc flush with its working plane.

From the same 15-24 mm plywood you need to make several parts:

The frame to which the engine will be attached.
Feed table with guides for changing the angle of inclination.
Disk protection design.
Base for attaching the entire machine to the workbench.

The disk protection can be made in the form of an arch with right angles or truncated ones. It, like the feed table, is attached to the frame. From additional accessories You can install a protractor stop on the feed table, which will allow you to feed the workpiece at a fixed, horizontal angle.

Paying tribute to aesthetics, it is advisable to polish every detail before assembly. But this is optional, but with the serving table this must be done carefully. Smooth surface will ensure uniform and continuous movement of the part along the working surface of the disk.

The purpose of this machine is revealed in its very name - surface grinding, that is, for grinding flat surfaces parts and blanks. It can be disk, drum (like a thicknesser) or belt. Moreover, its working surface can be positioned vertically, horizontally or adjustable.

Some machine designs are made fully adjustable. But this is individual. Homemade cars everyone does it for themselves to make it more convenient to work. Designs with full adjustment are more difficult to manufacture. They have adjustable pressure on the drum or belt, that is, in other words, there is the possibility of fixed movement of the working surface along the vertical axis. And the tool rest has a movement mechanism in two directions, like the cutter holder carriage on lathe.

From the verbal description it is difficult to imagine what it looks like. And even more difficult to understand how it works. But today we have the Internet. There you can find videos where seasoned craftsmen share their experience, explain in detail and show how to make such equipment. Detailed drawings and diagrams are provided with exact dimensions and instructions on what material to use for assembly. In general, if you have difficulty designing it yourself, you can always simply make someone else’s copy.

This machine was invented for processing long parts. Abrasive tape It is based on a durable fabric fabric, fastened into a ring. There are different sizes. It is driven by the same electric motor with similar characteristics. But some craftsmen replace the engine with a drill. Good drill- a universal tool in many respects. However, such a replacement is more relevant for small-sized desktop machines, as a rule, these are used by modellers.

How to assemble a belt sander with your own hands? The belt is stretched between two shafts or drum rollers. One of which is the leading one (it is mounted on the motor spindle), and the second is the driven one (it provides tension on the sanding belt). To prevent the tape from jumping off the drums, stopper washers are attached to their ends. It turns out something like a textile reel. With minor distortions, the tape wears out faster than the edges of the tape rubbing against the lock washers are destroyed. So this idea is quite viable and justifies itself.

Also, a support screen is installed between the drums on the back side of the belt, which ensures tight pressing of the entire plane of the workpiece to the surface of the belt. To reduce friction, the screen is carefully polished. It can be made from either light metal or hard wood.

The drive roller must be rubberized or made of hard rubber. This will ensure that the tape cannot slip across the surface of the roller. The entire structure can be positioned in different ways if necessary: vertically, horizontally or at an angle. A rigid hand rest, at an angle of 90 degrees, or an adjustable one, is attached to the common bed, as on all similar machines. The distance between the tape and the edge of the table at hand should not be more than 3 mm. Since rupture of the belt is not capable of causing significant bodily harm, protection is done only to remove grinding products.

Homemade grinder

A grinder is a high-speed belt grinder or universal machine. Working surfaces - disk and tape. The engine used is the same as on all machines. And high speed is achieved by using pulleys of different diameters. Pulley large diameter mounted on the motor spindle and is the leading one. The small pulley is a tension pulley.

On universal machine A disk is also attached to the spindle. You can also install an additional transfer roller, the support mounts of which will be spring-loaded. This is done to quickly change the abrasive belt.

The grinder differs from other grinding machines in its processing speed and versatility. Using interchangeable belts for different materials, you can quickly process even high-alloy steel surfaces.

Materials for assembling the machine
Engine selection
Assembly of drums and tape
Build process

The main function of wood sanding machines is finishing natural material using abrasive elements. Machines and devices of various types can have a wide range of capabilities and allow sharpening knives, grinding decorative and furniture products, and also perform internal and external polishing of the workpiece.

Modern units are capable of ultra-fine polishing, giving products a perfectly smooth surface.. One of the advantages of such equipment is its excellent performance and high efficiency both when performing a rough roughing process and during high-speed grinding.

In production you can often find calibrating, disc and oscillating (spindle) types of grinding units. No less popular is the disc grinding machine, belt grinder and drum polisher. The kinematics of all grinding devices without exception, be it a calibration or polishing sample, is based on the rotation or movement of a wooden part along a straight or arc path and the simultaneous rotation of the working part of the unit, but this applies to stationary machines. If you mean hand tool, then we are not talking about the movement of the workpiece, but only the grinding machine moves. Returning to stationary wood grinding machines, we note that high-quality processing The surfaces of large-sized products are best performed on tape samples. Factory equipment is not cheap, so many owners of small home workshops are increasingly interested in how to make a belt sanding machine themselves.

Design of belt units

To have an idea about the manufacture of a sanding unit with an sanding belt, you need to familiarize yourself with its design, which includes:

an abrasive belt stretched horizontally or vertically on the frame;
a pair of drums (drive and tension cylinders). IN in this case kinematics provides for the launch of the driving element using an electric drive that transmits torque by means of a belt drive;
metal or wooden table, and the first option makes it possible to work with more complex parts;
an electric motor with a power of at least 2.8 kW, due to which the sanding belt (emery) can move at a speed of 20 m/second;
a hood that removes wood dust.

There is a close relationship between the length of the working tool and the bed, as well as similar parameters of the workpieces that are to be processed on this unit. Every experienced craftsman will confirm that working with equipment is more comfortable if the workpiece wooden element inferior in length to the working surface. A properly assembled homemade belt sanding machine will allow you to easily level the surface and remove all errors, making it even and smooth. Also, belt units will quickly and efficiently remove old paint coatings, will cope with the processing of edges and ends, sand curved shapes and polish a flat wooden piece of furniture.

Materials for assembling the machine

Many novice carpenters make a grinding machine from a drill, but we propose to create an improved tool. Before assembling a belt sanding machine with your own hands, you need to decide on the material for the manufacture of its main components. For example, it is better to make a desktop from thick metal, giving preference overall dimensions canvas within 500x180x20 mm. We draw your attention to the fact that the larger the bed, the more functional it is and the more varied the parts that are planned to be processed will be.

Table

Making a working surface looks like this:

Cut off one side of the metal sheet.
Carry out markings.
Three holes are drilled at the end of the cut sheet, through which the working surface is bolted to the frame.

Engine selection

A homemade wood sanding unit is equipped with a motor, and in this case an electric drive from a washing machine is suitable, although you can choose any motor with a power of about 2.8 kW, capable of performing an average of 1200-1500 rpm. The drive is tightly fixed in a stationary state to the frame.

Assembly of drums and tape

Now we have to make two drums for the surface grinding unit, for which we will need a sheet of chipboard, from which blanks of 200x200 mm are cut and a package with a diameter of 240 mm is assembled. After assembly, the structure is machined to a diameter of 200 mm. The drive cylinder is installed on the drive shaft, and it is this that will drive the abrasive material. The tension element is fixed around the axis of the frame on bearings.

Make sure that the belt can easily touch the tabletop, which is achieved by ensuring a bevel on the side of the drum.

When assembling the drums, do not forget that they inner diameter should exceed the outer one by several millimeters. This is necessary so that the tape is placed in the middle of the cylinder and does not slip off. Now we need a sanding belt, for which abrasive sanding material, cut into strips and then glued together with a high-quality adhesive, is suitable.

Drum grinding unit

Just like industrial designs, household units can have different configurations, although, as noted earlier, their kinematic diagram and operating principle are similar. Above we told you how to assemble belt sanding equipment, and now we’ll find out what to use to make a homemade drum sander.

In this case, instead of a stretched abrasive belt, the homemade product is equipped with a disk shaped like a drum, which is used to polish wooden blanks. As in the previous case, this simple type of aggregate is created quickly and without much difficulty, and here we also don’t need complex circuit or intricate drawings.

Build process

When building a drum sanding machine with your own hands, you can use asynchronous motor from the washing machine, and in addition to it from old typewriter remove pulleys, belt and useful electronic parts. Sanding drums are usually made from bars cylindrical, wooden rings, cardboard or plastic pipes.

When starting to make a wood grinding machine, cut a segment from the pipe, equal to length the main grinding element so that it is slightly shorter than the rod, to which it will subsequently be fixed. End caps equal to the diameter of the pipe, with holes in the middle, are cut out of a sheet of plywood. The plugs are fixed in end sides pipes using screws.

Now you can install the rod axle, fixed with reliable glue. The surface of the pipe is covered with sheet rubber, which will ensure a better fit of the workpiece. The emery cloth is attached in a spiral to the surface of the drum with a stapler, and sanding drum ready.

The body and working surface of the unit are made of wood or thick plywood. The movable part of the desktop in front is attached to an adjusting screw, and at the back it is mounted on hinges. The engine is hung on the lower part of the body, where a hole is made in advance, and the drum, made by hand, is attached to the upper part of the frame. The rod (axis) sits on both sides on bearings fixed to the side posts. At the final stage, the pulleys are installed on the axle and the belt drive is pulled through. To consolidate the knowledge gained, we suggest watching the video.

No home craftsman can do without hand power tools. But sometimes there comes a time when such a tool is not enough, and the help of serious equipment is required. For example, a belt sanding machine can process the surfaces of large parts. Industrial units are too expensive, so many craftsmen make their own grinding machines.

Belt Sanding Machine Design

Wood is widely used to make all kinds of products and parts. In order to process a wooden piece properly, various equipment is used. Careful, high-precision processing of wood is carried out on belt sanding machines, which, as a working tool, have an abrasive belt.

The design of the grinding unit includes:

An abrasive belt that can be positioned horizontally or vertically. It is installed on the frame and placed between the rotating drums.
Lead and slave drums. The rotation of the drive drum occurs due to an electric motor, which transmits torque through a belt drive. The rotation speed of the leading element, and therefore the speed of movement of the belt, can be adjusted by specially established surface treatment modes.
The equipment table can be wooden or metal. More complex workpieces can be sharpened on a metal base.
The electric motor should have a power of about 2.8 kW and be capable of providing the belt with a normal speed of 20 meters per second.
A special mounting hood must be installed so that during technological process it was possible to remove dust generated during operation.

Length of the machine and its working tools depends on the length of the products, which will be processed on it. It is much more convenient to work with workpieces that are shorter than the working surface.

What are grinding machines used for?

As a rule, the equipment is used for finishing machining products for final stages production. Belt sanders can work with both wood and metal.

Woodworking equipment is capable of finally level the surfaces, remove roughness and irregularities in the form of elevations or depressions, remove burrs, grind curves, make internal grinding, achieve even and smooth surfaces of the product.

Metal cutting machines work with non-ferrous metals in the form of flat, round and rectangular blanks and with plain and alloy steel. They are capable of rational and a short time grind large diameter pipes and round timbers.

In addition, belt sanders intended:

for sanding products before the paint coating procedure;
for processing bar and panel blanks, their side edges and ends;
for processing flat surfaces;
for grinding curved surfaces.

Manufacturing instructions

Having studied the design of the equipment, you should decide what its main elements will be made of.

What to make the bed out of?

It is best to make a desktop from thick iron. The ideal dimensions of the canvas are 500x180x20 mm. However, the larger the dimensions of the frame, the more options various parts can be processed on it.

Large work surface will be much more convenient and functional than a small bed. To make it you will need:

Cut one side of the canvas prepared for the table using milling machine on metal.
Make markings.
Drill three holes in the end of the cut piece.
Using three bolts, secure the working platform to the frame.

Selecting and installing a motor for the machine

The engine for the unit can be a motor from washing machine. If this is not available, then you can select a motor whose rated power will be up to 3 kW, and the operating intensity will be about 1500 rpm. The power unit for the grinding machine should be tightly and securely fixed to the frame.

Master and slave drums

You can make such elements for a grinding machine yourself from a material such as chipboard. To do this you need:

Cut out chipboard sheet workpieces measuring 200x200 mm.
Assemble a package 240 mm thick from the resulting blanks.
Fold everything and grind until optimal diameter at 200 mm.
Attach the drive drum to the motor shaft. It will set the tape in motion.
The driven drum is secured around the machine axis on bearings. In this case, there must be a special bevel on the side of the drum. This will help ensure the tape touches the work surface softly.

When making drums, it is worth considering that diameter of their central part should be a couple of millimeters larger than the outer diameter. This is necessary to ensure stable operation technique, since the flexible tape will be in the middle of the drum.

DIY sanding belt

You can use several sanding strips as a sanding belt. They will need to be cut into pieces 200 mm long and glued together. Ideal option the basis for the canvas will be a tarpaulin.

Having assembled the structure from all the selected elements, you can safely begin processing the wood.

Sanding machine from a hand sander

Taking as a basis manual grinder, the remaining parts of the equipment can be made with your own hands from chipboard, pine and birch bars. The U-shaped stop is glued with PVA glue, the remaining elements of the unit are connected with screws.

The base of the machine can be connected by loops two pieces of chipboard. For greater strength, the hinges are secured with M6 bolts.

The grinding machine is installed to the base using bars, which are pre-fitted to the shape of the body and glued with pieces of rubber on top.

At the front, the sander is secured with suitable sized furniture confirmers. With their help, the grinding plane can be set in the desired position.

The machine is attached to the base from the back with a block and two screws. To ensure that the thrust pad and the grinding plane are in line, pieces of soft rubber can be glued under the body.

In the horizontal part of the U-shaped stop, you can make a groove for moving a small carriage, which may be useful I use an electric planer for sharpening knives.

After securing and adjusting the grinder, the machine can be used.

Having studied the options for making a belt sanding machine with your own hands and strictly following the instructions, you can acquire multifunctional equipment. Such equipment will be capable of not only grinding wood products, but also sharpening any cutting tools.

During production wooden structures V mandatory it is necessary to clean their surfaces. Manual labor will take a long time and will not be productive. Factory grinding centers are expensive. Therefore, in some cases it is more advisable to make the machine yourself.

Drum machine design

Manufacturing should begin with studying the design features of this type of equipment. The drum type grinding machine is designed for processing wooden surfaces, their alignment and deburring.

The device belongs to a type of wood surface grinder that performs a calibration function. There are many models and types of equipment. But the main task before making a unit with your own hands is the choice optimal design. The best option is a detailed acquaintance with factory analogues and drawing up a manufacturing scheme based on the data obtained.

Structurally, the machine should consist of the following components:

frame. The main parts of the equipment are attached to it;
power unit. Most often, an asynchronous electric motor is installed for this purpose;
grinding drum. It is important to choose the correct diameter and method for removing chips. With your own hands you can make a base on which the sanding tape is installed. Or order a cylindrical head with a professional turner cutting edge. It all depends on the type of work;
device for changing the frequency of the motor shaft;
Desktop. The workpiece will be placed on it. When making a machine with your own hands, experts recommend making this component from fiberglass;

Additionally, drum grinding equipment can be equipped with a mechanism for removing dust and chips from the processing area. It is also recommended to make a working table with a variable height relative to the snare drum. This will allow you to process part of the end wooden blank.

If grinding the outer or inner surface of the board is necessary, the drum should be positioned horizontally. At the same time, it is possible to adjust it in height.

Types of drum grinding machines

The next step is to select the design of the wood cutting machine. The main parameter is the shape of the wooden blank and the degree of its processing. Homemade equipment drum type is designed to form even and smooth surfaces with a small area.

Factory production lines require dedicated processing centers. They have complex functionality and can perform several operations simultaneously. However, their main disadvantage is high price. Therefore, it is not advisable to consider them as home equipment.

Exist following types machining centers:

surface grinding. Processing is performed in one plane. Can be used as an example for self-production;
cylindrical grinding. Designed for processing cylindrical surfaces. For this purpose, the package includes several nozzles with different diameters;
planetary. With their help, a flat plane is formed on products with a large area.

To complete a small home workshop, surface grinding models are most often chosen. They are distinguished by their simple design, availability of components and relatively quick production.

In addition to leveling, drum sanders can be used to remove layers of paint or varnish. They are used for restoration old furniture or wooden parts DIY interior.

Making your own grinding machine

The most simple model The do-it-yourself machine is a drill that is mounted on a bed. Sanding cylinders are machined from wood and sandpaper with the required grain size is attached to their surface.

But similar design has little functionality. For processing medium volumes, it is recommended to make woodworking equipment according to a different principle. First of all, you need to choose the right power unit. Most often, an electric motor with a power of up to 2 kW and a speed of up to 1500 rpm is used. These requirements are met asynchronous models, which can be taken from old household appliances– washing machine or vacuum cleaner.

The procedure for making a homemade machine.

Frame. It should be quite stable. Therefore, it is made from sheet steel with a thickness of 1.5 mm or more. As an alternative, you can consider plexiglass with a thickness of 10 mm.
The engine is installed so that the shaft is in a vertical plane.
Drum for processing. If you plan to perform only grinding work, an abrasive belt is installed on it. For more deep processing you will need to make a steel cone with a cutting edge.
Desktop. It is located at the top of the diagram. It is recommended to make it adjustable relative to a fixed cylinder.
Control block. DIY designs rarely provide the ability to adjust the engine speed. Therefore, the block will consist of buttons for turning the unit on and off.

Homemade machine

All materials in any production, in addition to manufacturing, require additional and finishing processing. Vivid examples of such treatments include grinding and polishing the product. These two types of mechanical action on the surface of the part bring its appearance to perfection. However, everyone knows that performing these operations by hand will take a lot of time and effort, and even processing can only be ensured by a very experienced craftsman. To facilitate this kind of work, people have come up with various devices and mechanisms to help them. Some of them will be discussed further.

General purpose and types of machines

The machine is intended for final processing of parts and workpieces made of different materials by exposing them to an abrasive or diamond-coated surface. The machine, its component mechanisms and I allow devices t maintain the accuracy of size and shape, and also ensure the creation of an ideal surface of a part or workpiece.

Using the machine, you can process flat parts, surfaces outside and inside, parts of various geometric shapes, grind or polish threads and gear teeth. According to their own Characteristics of grinding machines are divided into:

Cylindrical grinders.
Internal grinding.
Centerless grinding.
Surface grinding.
Special machines (for grinding threads, gears).

Grinding process

Grinding is the process of removing the top layer from the surface of a workpiece using abrasives or diamond chips. They are collected into a common mass on the working surface and held together with a binder. They ultimately form a grinding wheel or belt.

Each abrasive particle has sharp edges; when it touches a material (metal, plastic, wood, stone), it works like a cutting tool and removes chips, like a milling cutter or drill. If we take into account the considerable rotation speed of grinding wheels, as well as the occurrence of chips as a product of grinding, it is necessary to take into account the possibility of injury from these very chips.

Safety precautions during operation

When working on the machine it is required Observe the following safety rules:

Necessity at work and at home

Today, grinding machines are used constantly in production shops. Depending on the scale of production, either one machine or all its varieties in complexity and size can be installed.

However, even in everyday life this equipment there is always a use. Some people have a bench sanding machine for metal processing in their garage. Others have several wood grinding machines of different designs installed in their workshop. Still others own a universal, combined machine. There are power tools for manual grinding: drum type, belt grinder, band saw, small machines or large machines. And they are all in demand.

The market offers a fairly wide range of all kinds of similar equipment from many manufacturers. And their prices are quite reasonable. But these are general purpose machines. And if a person is engaged own business, or he has a hobby, then he needs a specially specialized machine. Here the price has already increased several times.

For this reason, or based on their own desires, many craftsmen make homemade products. Mainly for processing wood, plastic and metal, less often for cutting and grinding stone. And, in general, this is correct. After all, even simple sharpening of kitchen knives is easier and faster to do on a machine than by hand using a whetstone. Fortunately, its very simple design allows you to create a homemade machine for wood with your own hands.

DIY grinding machine For a tree it is not difficult to assemble. People also simply call it emery.

The main component is the engine. Surely many people have an old washing machine in their household. Its motor is quite suitable for this purpose. If not, a new engine on the market will be quite expensive, but at any flea market you can find a used one in working condition. The electric motor must be strong from 750 W to 2 kW, not high-speed from 1500 to 3000 rpm, if three-phase, then you can always adapt it to 220 V. You will also need thick plywood, self-tapping screws, PVA glue, and tools, of course.

The task is simple: Make a hard drive with sandpaper glued onto it. To do this, draw a circle with a diameter of 150-170 mm on plywood; if the plywood is thick enough to hide the clamping nut, one piece is enough. If not, glue two identical pieces together with PVA glue. The motor spindle clamping nut must be recessed into the disc flush with its working plane.

From the same 15-24 mm plywood you need to make several parts:

The frame to which the engine will be attached.
Feed table with guides for changing the angle of inclination.
Disk protection design.
Base for attaching the entire machine to the workbench.

The disk protection can be made in the form of an arch with right angles or truncated ones. It, like the feed table, is attached to the frame. As an additional accessory, you can install a protractor stop on the feed table, which will allow you to feed the workpiece at a fixed, horizontal angle.

Paying tribute to aesthetics, it is advisable to polish every detail before assembly. But this is optional, but with the serving table this must be done carefully. A smooth surface will provide uniform and continuous movement of the part along the working surface of the disk.

The purpose of this machine is revealed in its very name- surface grinding, that is, for grinding flat surfaces of parts and workpieces. It can be disk, drum (like a thicknesser) or belt. Moreover, its working surface can be positioned vertically, horizontally or adjustable.

Some machine designs are made fully adjustable. But this is individual. Everyone makes homemade machines for themselves to make it more convenient to work. Designs with full adjustment are more difficult to manufacture. They have adjustable pressure on the drum or belt, that is, in other words, there is the possibility of fixed movement of the working surface along the vertical axis. And the tool rest has a movement mechanism in two directions, like a cutter holder carriage on a lathe.

From the verbal description it is difficult to imagine what it looks like. And even more difficult to understand how it works. But today we have the Internet. There you can find videos where experienced craftsmen share their experience, explain in detail and show how to make such equipment. Detailed information provided drawings and diagrams with exact dimensions and instructions on what material to use for assembly. In general, if you have difficulty designing it yourself, you can always simply make someone else’s copy.

This machine was invented for processing long parts. The abrasive belt is based on a durable fabric fabric, fastened into a ring. There are different sizes. It is driven by the same electric motor with similar characteristics. But some craftsmen replace the engine with a drill. A good drill is a universal tool in many respects. However, such a replacement is more relevant for small-sized desktop machines, as a rule, these are used by modellers.

Homemade grinder

A grinder is a high-speed belt grinder or universal machine. Working surfaces - disk and tape. The engine used is the same as on all machines. And high speed is achieved by using pulleys of different diameters. A large diameter pulley is mounted on the motor spindle and is the drive pulley. The small pulley is a tension pulley.

On a universal machine, a disk is also attached to the spindle. You can also install an additional transfer roller, the support mounts of which will be spring-loaded. This is done to quickly change the abrasive belt.

The grinder differs from other grinding machines in its processing speed and versatility. Using interchangeable belts for different materials, you can quickly process even high-alloy steel surfaces.