A wood sander is a highly efficient apparatus for processing material planes. Using such units, you can quickly and efficiently process wood, obtaining perfectly smooth surfaces.
Classification
A wood sander is used at the final stage of wood processing. During the work, special rough circles, tapes, and powdered pastes are used.
Currently, based on their purpose, the following units are distinguished:
- Automatic cylindrical grinding devices.
- Devices designed for processing the internal surfaces of parts and workpieces.
- Surface grinding machines.
- Specialized models that are used to implement narrowly focused tasks.
Areas of application
The areas in which a wood sander can be used are extremely varied. Latest achievements in the field of carpentry processing of parts, they make it possible to replace large turning units with more convenient to use mobile devices.
Such common solutions as drum and belt sanders for wood can be successfully used for:
- Rough abrading of workpiece surfaces.
- Precise processing of wood planes.
- Obtaining refined surfaces.
- Cleaning of timber and panel parts, their side and end edges.
- Intermediate sanding of paint and varnish coatings.
Thanks to a wide range of applications, grinding machine for wood is one of the most popular units among professional carpenters. Manufacturers are constantly improving popular models and offering consumers a whole host of additional tools to perform complex, specific tasks.
How to assemble a wood sanding machine with your own hands
We invite you to consider the features self-assembly drum device for processing the outer surface of wood. This will require several functional design elements. Some of them can be found in the household.
Engine
To assemble a wood sanding machine, the easiest way is to remove the motor from the old washing machine. Fortunately, Soviet-made models gather dust idle in many closets. From here you can get belts, pulleys and electrical parts.
However, any motor with a power from 200 to 300 W is suitable for assembling the grinding unit. It is desirable that its design be compact in size.
If it is necessary to obtain maximum efficiency indicators, you will have to find an asynchronous motor capable of delivering 1500-3000 revolutions.
Drum
This structural element can be made using all kinds of leftovers building materials. Sometimes, to assemble a drum sanding machine for wood, it is enough to take a pipe covered with old linoleum, rubber rings glued together or cylindrical bars mounted on a metal axis. Let's look at the first of these options.
To make a drum, it is enough to use a piece of PVC pipe, metal rod, durable board, screws, glue and linoleum. Plugs are cut out of wood corresponding to the cross-section of the existing tube, in which holes are drilled for the rod. Such locking elements are inserted into the pipe and secured with screws.
A metal rod is passed through the plugs and seated on epoxy glue. A layer of dense linoleum is glued on top of the polyvinyl chloride pipe. As alternative option You can use rough rubber. This shell will act as the basis for securing the sandpaper. You can fix the latter on the finished drum using double-sided tape or staples for a stapler.
Frame
To make the case where the homemade wood sanding machine will be placed, ordinary plywood is suitable. You can make a design of a rather unassuming structure. All you need to do is install the side panels, work table and additional reinforcement struts. If desired, you can make a metal shell.
Installation
The engine is securely mounted on a statically installed base. The rotating axis is threaded through a pre-prepared hole in the housing wall. The grinding drum is installed in the upper part and rests on bearings in cages that are fixed on the side walls of the structure.
Pulleys are attached to the axis of the drum and engine. The drive belt is being tensioned. Wiring and switches are connected. Clamping bolts are screwed into the sides of the housing, and adjustment bolts are screwed into the lower part.
To give the structure a complete and attractive look, you can treat the surfaces with paint. Naturally, it is necessary to undertake such work before assembling and installing the unit. To increase safety during operation of the device, the design can be supplemented with a protective casing placed above the drum.
Finally
Thus, we tried to consider the main classes of grinding machines, their scope of application, and also gave an example of self-assembly of the unit drum type. Ultimately, the decision to buy a factory device or assemble one from existing materials depends on the size of the budget, goals, available funds and the needs of each individual user.
bomu home handyman It’s nice to feel like you have everything when doing your favorite job the necessary tool. Branded items collected into a collection with his own hands, his wealth and his pride. He takes care of it, carefully selects it and dreams of replenishing it in the form of a gift or a homemade machine.
Jet DDS-225 - 2 sanding drums for coarse and fine sanding in one pass
Wood carving or homestead construction, cooperage or making homemade musical instruments- needed for everything quality tool. Including for its finishing. The drum grinding machine is the crown of the entire set of tool equipment.
After it there will simply be nothing to collect if it is from the Jet Plus family. A good workshop, created over many years of effort, is a real pride of its owner.
Machine design
The drum-type grinding machine belongs to the group of surface grinding equipment. It is designed for finishing all kinds of wooden and wood-containing materials with abrasive sandpaper of various grain sizes. The technological cutting process takes place at high speeds and with a large release of abrasive dust and dust from the cut part of the workpiece.
Application of powerful ventilation systems allows you to work on similar drum equipment in a relatively comfortable conditions. Structurally, such woodworking equipment is:
- portal or console type mechanisms;
- on console-type drum machines it is possible to produce parts with their rotation, which increases the processing width;
- the portal design of drum machines increases its rigidity, allowing you to work with maximum operating parameters without reducing accuracy;
- with single (Jet models 10-20 Plus) or double (Jet models DDS-237) sanding drums;
- stepless cutting depth adjustment;
- lower bed of stationary or mobile class (Jet series 10-20 Plus);
- drive table for feeding the workpiece;
- with adjustable or stationary feed speed;
- ventilation pipes for connecting suction cyclones to each processing unit;
- working engine from 1.3 kW (Jet series 10-20 Plus) to 11 kW (Jet series DDS-237);
Grinding process wooden materials consists in the implementation of the following technological methods:
- selection of sanding belt of appropriate grain size in accordance with the required finish;
- for maximum removal or peeling – 36 units;
- For standard process– 80 units;
- finishing or final processing – up to 220 units;
- winding the selected sanding tape onto the cutting shaft;
- it is possible to wind tape of various grain sizes on equipment with paired cutting drums;
- setting the dimensions of the workpiece (from 0.8 to 75 mm for 10-20 Plus) and the amount of removal per pass;
- selection of the required feed speed of the table with the workpiece (from 0 to 3 m/min), as in the 10-20 series;
The use of abrasive paper of various grain sizes on paired shafts makes it possible to obtain best performance quality in one pass. Especially when processing wood with your own hands.
Work principles
The drum grinding machine is quite simple both in performing technological operations and in its maintenance. The operating procedure is as follows:
- set the necessary cutting parameters;
- with your own hands, thread the emery cloth onto the cutting drums equipped with its tensioners;
- calibrate the cutting part;
- such an operation is necessary for accurate alignment of the working drum relative to the feed table;
- This process is carried out using 2 calibrated wooden blocks located along the width of the feed table under different sides of the drum;
- Having achieved symmetrical contact between the main shaft of the 2 bars, proceed directly to the actual technological process manufacturing the part.
After several passes, in order to maintain performance and surface quality, it is very useful to carry out preventive cleaning yourself. abrasive tape with a special pencil. All similar machines are equipped with this pencil, including models 10-20. It can also be purchased separately.
Homemade drum sander
This drum machine for wood has a specific, very practical purpose. It is not universal and its rather rare use in ordinary farms does not contribute to the growth of popularity. The relatively high cost, dimensions and difficulty in pre-setting make such equipment a poor stepchild among grinders, drills and vibrating machines.
Sometimes it makes sense to make a similar tabletop grinding machine with your own hands, using the lightweight Jet series of drum equipment as a basis. The design of such a homemade drum mechanism is not complicated:
- the frame and body of the main cutting part are made of multi-layer plywood or good wood thickness from 10 to 20 mm;
- The engine from an old washing machine, disassembled with your own hands, is also well suited for these purposes;
- the pulley remains in place;
- It will be quite difficult to make a snare drum; although it will be homemade, the functions will remain the same;
- sanding drum a homemade machine is made from a thick-walled plastic pipe of a suitable diameter (like the Jet model 10-20 Plus);
- the main axis of the cutting unit is made from a calibrated metal rod (up to 20 mm);
- with their own hands they fit wooden plugs under the plastic pipe and the central axis;
- a homemade bearing assembly will have to be ordered from specialists;
- Having assembled the drum assembly and fixing its parts together with 10 fasteners, paste them with a rubber sleeve;
- you can start assembling a homemade machine;
- the hand-made serving table, on the serving side, is mounted on piano hinges;
- an adjustable stop screw is installed on the output side of the grinding machine;
- installation of ballasts will be the final touch of this woodworking composition;
This is what a homemade, do-it-yourself wood grinding machine of the type discussed in the article will look like. Although, to be honest, it is still dangerous to deal with such homemade products.
Every person who has had to deal with wood processing knows the importance of final sanding of the finished product.
This also applies to holders for various agricultural implements, wooden furniture, and building elements(doors, windows, window sills) and any other wood products. Sanding allows you to remove burrs, as well as make the wood smooth and shiny.
Of course, sanding work can be done using a regular piece of sandpaper or a special attachment on a drill or angle grinder. But this takes a lot of time and does not ensure the ideal shape of the product. Therefore, various grinding machines have been created for such purposes.
Most often in living conditions and in small-scale production they use a drum grinding machine, a device, the principle of operation and the possibility of making it with your own hands we will consider in this publication.
1 Drum sander - device, principle of operation
The drum grinder gets its name from the rotating cylinder - the drum, which, in fact, performs the grinding function.
In addition to the grinding itself, which allows you to remove burrs and give wooden surface ideal smoothness, such devices also perform a calibration function. Grinder drum or any other type allows you to adjust the wooden part to required sizes accurate to the millimeter.
This machine is used for finishing grinding and calibration of flat and long wood products, such as panel surfaces made of wood, chipboard, fiberboard, etc., doors, window sills, etc. Using such a device for processing cylindrical parts impossible.
1.1 Main components
Drum sanding machine appearance and the set of main components does not differ fundamentally from any other machines.
The basic package of such a device includes the following elements:
- The bed is the part of any machine to which all other elements are attached.
- The engine performs the function of driving the moving parts of the machine. Most often, drum sanders for wood are equipped with two motors. One rotates the drum itself according to the principle of a drill, the second sets the feed belt in motion.
- A sanding planing drum on which the sanding belt is wound and attached. It is necessarily equipped with a tension mechanism, with the help of which, when the tape is heated, it is automatically tensioned. A rotating drum with a sanding belt directly imparts smoothness to the wood product.
- Feed drum with conveyor belt. This machine part woodworking performs independent wiring of wooden products on the grinding drum. Thanks to the flat surface of the conveyor and the same distance from the belt to the drum along its entire plane, the product is evenly adjusted to the required dimensions.
- A mechanism that regulates the speed of the conveyor belt.
- Sanding drum fixing posts equipped with a ruler. A ruler and screw fixation on the stands allow you to set required thickness, to which the product must be fitted.
- The protective casing covers the grinding drum to prevent injury during operation.
- Machine for removing dust and chips.
1.2 Operating principle
This grinding machine works on the principle of a drill. Its grinding part is rotated by a motor at high speed - an average of 2000 rpm.
The grinder may have different weight, different sizes, length of the sanding drum, length and width of the conveyor belt, maximum and minimum height drum settings, etc.
The choice of technical parameters of the device depends on the functions for which it is purchased.
After installing the machine, you need to calibrate the grinding drum to avoid eccentric rotation and unnecessary vibrations. In addition, an uncentered drum will not be able to clean the products evenly.
To do this, we take two beams of the same height, install them on the feeding belt, lower the drum onto them and fix them in this position. Next, we set the height of the mechanism, depending on the size of the part being sanded.
We turn on the installation. For the first pass it is better to set the minimum speed of the feed belt, for the final – maximum – 3 meters per minute.
The grinding drum should gain momentum, similar to the principle of a drill. After that we put wooden beam to be processed onto the conveyor belt. The passage of the timber under the drum occurs automatically.
Repeat this action required quantity times until our part arrives the required form and will not acquire the specified dimensions.
If the sides of the product have different size, the height of the drum must be adjusted for each change in parameters.
2 Types of machines
If we talk about grinding machines in general, their classification is based on two parameters: scope and functions performed.
By area of application, machines are:
- cylindrical grinding machines. Designed for processing parts with a round cross-section;
- surface grinding. Their task is to grind flat parts. The drum machine also belongs to this type;
- internal grinding. With the help of such mechanisms, the internal surfaces of the product are processed. Drills are often used for this purpose;
- specialized. Designed for processing complex surfaces - threads, grooves, teeth, etc.
Different machines can perform different functions:
- trimming and stripping;
- sharpening;
- grinding.
2.1 Making a drum machine with your own hands
It is difficult to make a drum sander for untreated wood with your own hands, but it is quite possible.
For this we take a list necessary elements and looking for suitable material and spare parts.
And so, we need:
- Bed. For these purposes, any stable workbench or table to which you can screw other elements of the machine is suitable. It is better if the frame is metal. If you have to use wooden structure, it needs to be qualitatively strengthened with your own hands.
- Electric motor with a power of 200-300 W. The speed should be 1500-2000 rpm. It's better if it's single-phase asynchronous motor. For these purposes, a mechanism from an old washing machine (in this case we also take pulleys with a belt), drills, grinders, etc. is suitable.
- Sanding drum for wood. This is probably the most important and most difficult part of the machine, on which the quality of the work performed will depend. We’ll talk about how and what to make a homemade grinding drum with your own hands later.
- Drum stands. The device that fixes the drum and regulates its height can be made of wooden beams. The mechanism that regulates the height can be made with your own hands in two versions. The first option is through holes on the stands through which the drum will be attached. This option is simpler, but it allows you to work only with a fixed adjustment step of about 1 cm. The second option is long screws installed perpendicular to the drum. In this case, by pressing the screws we can raise the grinding device, and by releasing it we can lower it. In the second option, it is possible to adjust the height with millimeter precision.
We will not make a conveyor belt with our own hands. This is possible, but it is not necessary. Submit to homemade machines, as a rule, is carried out manually.
2.2 Making a drum
Before we begin making the drum itself, we need to clearly understand what functions our machine will perform. The fact is that the smaller the size of the cylinder, the easier and faster it will be rotated by the motor from the drill.
To make a grinding drum, we need a piece of anything that has a cylindrical shape, the required length and diameter. This could be a wooden beam with round, PVC pipe, metal pipe and much more.
We will consider a PVC pipe as a material for making a drum with our own hands.
- Take the required size piece plastic pipe. We will also need metal pin, acting as an axis, wooden or plastic plugs that match the diameter of the internal diameter of the pipe, self-tapping screws, rubber, glue.
- We take plugs and make holes in them corresponding in diameter to the thickness of the rod.
- The holes in the plugs must be strictly in the center. The slightest eccentricity of the drum will lead to improper operation of the machine.
- We fit the plugs tightly into the pipe and fix them with self-tapping screws.
- Insert the pin into the holes in the plugs. The axis should protrude 2-3 cm from the cylinder on each side. It is this that will serve as an attachment to the adjustment posts.
- We glue rubber onto the drum. To her It will be easier to attach the sanding belt.
2.3 Assembling the machine
To assemble the machine you need:
- Install the stands on the bed.
- Attach the drum to them so that its lifting height can be adjusted.
- Connect the motor to the drum using a belt or chain drive.
- You can start working.
2.4 Homemade drum sander (video)
Homemade grinding drum on a drill.
When sanding wooden products, it is necessary to process not only straight planes, but also curly edges. For this an indispensable device is the sanding drum. You can buy such a drum or make it yourself. For work, use a hand drill or a stationary drilling machine.
Curly edges of joinery parts can be processed in another way, manual router With copy cutter according to the template. This gives a gain in time and quality, but only during processing large quantity details. If you have single products, then there is no point in making them for each template. Moreover, to make a template, you will again need a sanding drum; without it you cannot make an accurate template.
As I already said, you can buy a grinding drum; they are sold in different diameters and qualities. But working with such a device simply by holding the drill suspended is not very comfortable, and most importantly, it is impossible to obtain accurate and high-quality processing.
One of the adaptation options would be to make a small table for a drill. The drill itself is attached to the work table vertically. More from hand drill can be done .
The table can be assembled from scraps of MDF, thick plywood or chipboard (laminate). All parts are attached to each other with self-tapping screws. The product is assembled in the form of a box with a tabletop. A hole is drilled in the top cover to the diameter of the drum. The bottom edge of the sandpaper should be below the tabletop line. You can also make it from plywood.
You can easily attach legs to this frame, then you will have a free-standing tool. In the version you see in the photo, the box is attached to the desktop.
Almost any drill will do, but for serious work it is advisable to use a more powerful one. The drill is attached to the desktop frame using clamps. I already wrote on the site about horizontal installation drills, in the article.
Homemade sanding drum.
You can not only buy a drum, but also make it yourself. It's actually not that difficult if you have a wood lathe. The drum can also be processed using drilling machine, but it will be more difficult.
I use a metal drum for work; the skin is secured in it with a metal pin with a slot. The drum is installed on a stationary milling machine. Such a part can be turned using special equipment, see article. But such a part can be made using simpler means.
To assemble the device, we need a vertical axis; a bolt or pin with a diameter of 10/12 mm is suitable for this. and length 100-150 mm. . On this axis we place pieces of plywood, previously cut with a jigsaw with a small margin in diameter. In the center of all parts we drill a hole corresponding to the diameter of the bolt. Lubricate the plywood fragments with glue and tighten the nut. Then it is advisable to turn the drum on a wood lathe, this will result in a more accurate and even surface.
Another assembly option homemade drum. Only two plywood parts are placed on the axle, upper and lower, and a piece of hard foam is clamped between them. Simple packaging foam will not work, it is too loose. The product in the photo is assembled exactly like this.
How to glue the skin.
Stores sell sandpapers with a self-adhesive inner surface, this is the most convenient option. If there is no such skin, then you can glue a regular one. You need to glue it with an overlap, but you can’t join it on the abrasive, you’ll end up with a bump that will hit the part. To apply the sticker correctly, you need to mark the overlap at the lower end of the sandpaper, soak it in a solvent and clean off the abrasive.
Don't forget that sandpaper is consumables, and sooner or later it will have to be torn off and a new one glued on. To make this process easier, without damaging the drum itself, you must first stick thick paper and some sandpaper on it. I tried attaching the skin with a stapler, but it didn't work very well. The staples wear out quickly and also scratch the workpiece. Still the best option, this is the use of self-adhesive skin.
The diameter of the drum can be different, it depends on what parts you are going to process. But just remember, the smaller the diameter, the faster the skin will wear through. Most suitable option diameter from 60 mm. up to 100 mm. . Most often, the drum is used for processing parts up to 50 mm thick. , so the working height of the drum can be 70-120 mm. .
Everyone who worked construction work, repair, restoration of old doors, windows, window sills, etc., was certainly faced with the need to working surface was even, smooth and sliding. We used to take it in our hands sandpaper, if the surface was large, then the sandpaper was strengthened on a wooden trowel and, stocking up with great patience, they began the monotonous, monotonous work of sanding. Now, a lot of devices, so-called grinding machines and machines, have been created to help professionals and amateurs. Using them for certain grinding operations, we make the process of manual labor easier for ourselves by transferring some of the simple functions to the machine. Today we will talk about grinding machines that are used for processing wooden products.
Purpose, classification and areas of application of grinding machines
Grinding machines are used to reduce the surface roughness of workpieces, as well as to obtain exact dimensions. Usually grinding is The final stage processing of pre-prepared parts.
When working on grinding machines, grinding materials and tools are used.
Sanding materials - special powders, pastes, sandpapers.
TO grinding tools include cutting, polishing and grinding wheels, wheels, bars and segments.
Depending on their purpose, machines are divided into several types:
Cylindrical grinding;
Internal grinding;
Surface grinding;
Specialized grinding machines.
The classification of machines is based on the following characteristics:
Type of surface to be ground (internal or external, cylindrical or flat);
Type of parts that this machine can process (cylinders, shafts, rollers, racks, etc.);
Design features of machines (centerless, planetary, two-column);
Features of the elements of the processed parts (splines, threads, profiles, etc.).
The area in which grinding machines are used is very wide. Recent advances in machine tool construction, as well as the production of parts by casting, stamping, rolling, turning and carpentry, make it possible to use grinding machines instead of turning and milling machines (horizontal boring machines). Nowadays grinding machines can perform the following operations:
Cutting and peeling of workpieces;
Precise processing of various planes, wheel teeth, rotational surfaces, etc.;
Sharpening tools.
Drum grinding machine: purpose and main elements
Drum Sanding Machine By type it belongs to surface grinders, by class - to calibration ones. The main tool of the machine is grinding wheel, which here is made in the shape of a cylinder (drum). Typically this machine is used for woodworking. Using it, it is very convenient to sand and calibrate boards, slats and other flat and long wooden parts, such as panel surfaces made of chipboard, MDF, solid wood, veneer, etc.
The main elements of a drum grinding machine are:
The bed on which all the components and parts of the machine are mounted;
The motor ensures the rotation of the grinding and feeding drums;
Sanding drum;
Mechanism for changing the rotation speed of the feed drum
Desktop;
Feed drum;
Protective cover;
Dust removal device;
Mechanism for changing the height of the grinding drum.
You can see how a drum sanding machine works in the video.
Some models of drum-type grinding machines presented on the Russian market
Today on Russian market Grinding equipment in the drum grinding machines section presents products from various manufacturers. The leading place here is occupied by products under the JET brand. American company JET, part of the Swiss holding WMH Tool Group AG, today presents the following industrial and household drum grinding machines:
JET 10-20 Plus. Price: 25,000 rub.
The drum sander with a total capacity of 500 mm (250 mm x 2) is well suited for a small workshop where space is at a premium.
JET 16-23 Plus. Price: 37,000 rub.
A universal grinding machine with enormous potential and possibilities: musical instrument making, furniture making, kitchen sets, shop and bar equipment, performing a wide range of carpentry operations.
Double drum sander JET DDS-225. Price: 160,000 rub.
A very powerful machine, suitable for use in production conditions.
The Russian "Tool company "Enkor" is the official dealer of leading foreign manufacturers tools, equipment, machines, etc., offers the Corvette 57 drum grinding machine manufactured in China. The machine is designed to perform preliminary grinding of flat wooden blanks and bringing products to a given size, processing varnished and primed surfaces.
Corvette 57 - drum sanding machine price: 24100 rub.
German company Elmos Werkzeuge, manufacturer of power tools, woodworking equipment, garden equipment, presents its drum grinding machine Elmos DS 163. Price: 16,400 rubles. Designed for use in production as an alternative to hand grinders.
To sum it up brief overview grinding machines that are offered for purchase in the Russian Federation, we can say with confidence that there is a certain choice. You can find machines for use on large production, in small business and for personal use. As they say: “Every whim for your money.”
However, not everyone today is ready to shell out a tidy sum for a grinding machine. And the habit left over from the times of the Soviet Union of doing everything from scrap materials and with their own hands forces modern Kulibins to move their brains, rustle through the underbelly and “the eyes are afraid, but the hands are doing” - to produce many useful and necessary things. Moreover, technologically they are not much inferior to their production analogues, but the price is several times cheaper. Below we will look at how to assemble homemade drum grinding machine.
DIY drum grinder
We discussed above what it is useful for, as well as what it should consist of. Therefore, we take a list of the main elements and begin to search and collect them. And then we’ll talk about how to make a drum sander at home
Engine
Let's start with the engine. The easiest way is to take it from an old washing machine. If it is there, then half the job is done. From there you can take all the electrical parts, pulleys and belt.
Making a grinding drum
Now about the drum. It can be made from various materials and sometimes seemingly completely unnecessary remnants of repair and construction activities. For example, from wooden rings cut out and glued together, or four blocks cylindrical, fixed on a metal axis using epoxy glue, or from a paper tube onto which a roll of linoleum is screwed.
Here we will take a closer look at making a drum from a piece of PVC pipe. For manufacturing we will need: a steel rod 16-20 mm, a piece PVC pipes 100 mm in diameter, wooden board, screws, rubber, glue. Perhaps that's all. The steel rod will be the axis of the drum. Cut the required size piece from the pipe. It is slightly shorter in length than the rod. We cut out two end caps from wood according to the diameter of the internal section of our PVC pipe. We drill a hole in them for the rod. We insert the plugs into the pipe and secure them with screws. The screw heads must be countersunk. We pass our rod through the holes of the plugs and secure them with epoxy glue. We glue thick rubber on top of the PVC pipe. It will serve as a support for the skin and provide it with a better fit to the part. The drum is ready. You can strengthen the sandpaper using staples or double-sided tape. It is better to glue the tape in a spiral, this will avoid impacts during sanding.
Case and desktop
Wood or aircraft grade 15mm plywood is suitable for the machine body. You can also make a table from them. We make the case simply and unpretentiously: two side panels, a spacer panel in the middle and a desktop consisting of a base firmly attached to the case and a moving part. The work table must be strong and should not bend when the workpiece is pressed against the drum. On the feed side, it can be reinforced with an additional cross member, which will also create a supporting surface for the adjusting screw.
To ensure adjustment of the movement of the working table relative to the drum, we attach its moving part to the base on one side with two hinges or a piano loop, and on the supply side, screw in the adjusting screw through the middle spacer. It is important to know what thread pitch the screw has, then it will be possible to set the required processing thickness of the part.
Installation
We attach the engine to the lower part of the housing. We bring out its axis through a hole previously made in the body. We install a grinding drum in the upper part of the housing. The drum axis rests on two bearings in cages, which are bolted to the side walls. We make the holes for the clips a little larger in diameter. This will make it easier for us to align the drum. We attach pulleys to the axis of the engine and drum and tighten the drive belt. We install wires and a switch. We screw in the adjusting bolts from the bottom and the clamping bolts on the sides, which will support the desktop at the desired height.
The final touch - the body can be treated with varnish or paint, of course, before installation. Now our homemade drum sander is ready for use. For greater convenience in work, you can add to it protective cover above the drum. Connect the pipe from the vacuum cleaner to the casing. This will remove dust generated during work.
In conclusion. In this article we tried to consider issues related to drum-type grinding machines. And you make the choice to work on a device purchased in a store or make it yourself.