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 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 decoration. Drum grinding machine- the crown of the entire set of tool economy.
After him, there will simply be nothing to collect if he is from the Jet Plus family. A good workshop, created over many years of effort, is a real pride of its owner.
Machine tools
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 process of cutting takes place on high speeds and with a large release of abrasive dust and dust from the cut off part of the workpiece.
The use of powerful ventilation systems allows work on such drum equipment to be carried out in a relatively comfortable conditions. Structurally, such woodworking equipment is:
- mechanisms of portal or console type;
- 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 model 10-20 Plus) or double (Jet model DDS-237) sanding drums;
- stepless adjustment of cutting depth;
- fixed or mobile class bottom frame (Jet 10-20 Plus series);
- drive table for feeding the workpiece;
- with adjustable or stationary feed rate;
- 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 sanding belt appropriate grain size in accordance with the required cleanliness of processing;
- for maximum removal or peeling – 36 units;
- for the standard process – 80 units;
- finishing or final processing – up to 220 units;
- winding the selected sanding tape on 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 the best quality indicators 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 of the abrasive belt yourself 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;
- well suited for these purposes and the engine from the old one washing machine, disassembled with your own hands;
- 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;
- the grinding drum of a homemade machine is made of 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 adjust wooden plugs to fit plastic pipe and central axis;
- a homemade bearing assembly will have to be ordered from specialists;
- having assembled the drum assembly and fixing its parts together 10 fasteners, pasted over 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.
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. Previously, we took sandpaper in our hands, if the surface was large, then we fixed the sandpaper on a wooden trowel and, stocking up with great patience, 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 easier for ourselves manual labor, shifting 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 accurate 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.
Grinding tools include cutting, polishing and grinding tools, 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 the grinding wheel, which 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;
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. The 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: 25000 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: 37000 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 rubles.
A very powerful machine, suitable for use in production conditions.
The Russian "Tool Company "Enkor" - the official dealer of leading foreign manufacturers of 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 in large-scale production, 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 let's talk about how to make a drum grinder 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, it would seem, completely unnecessary remnants of repair and construction activities. For example, from wooden rings cut and glued together, or four cylindrical bars fixed on a metal axis with epoxy glue, or from a paper pipe onto which a linoleum roll is wound.
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 diameter 100 mm, wooden plank, 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 fasten them with epoxy glue. We glue thick rubber on top of the PVC pipe. It will serve as a substrate for the skin and provide it with a better fit to the part. The drum is ready. You can strengthen sandpaper with staples for a stapler or double-sided tape. It is better to glue the tape in a spiral, this will avoid shocks when sanding.
Case and desktop
Wood or 15mm aviation plywood is suitable for the machine body. You can also make a table out of 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 movable part. The working table must be strong and must 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 support surface for the adjusting screw.
In order to ensure the adjustment of the stroke of the working table relative to the drum, on one side we fasten its movable part to the base with two hinges or a piano hinge, and on the feed side we screw in the adjusting screw through the middle spacer. It is important to know what the thread pitch of the screw is, then it will be possible to set required thickness processing the part.
Installation
We mount the engine in the lower part of the case. We derive its axis through a hole previously made in the body. In the upper part of the body we install a grinding drum. The axis of the drum 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. So it will be easier for us to align the drum. We fasten the pulleys on the axis of the engine and the drum and pull the drive belt. We mount the wires and the 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 case can be treated with varnish or paint, of course, before installation. Now our homemade drum sander is ready for use. For more convenience in work, you can add to it protective cover above the drum. Connect the nozzle from the vacuum cleaner to the casing. This will remove the dust generated during operation.
In conclusion. In this article, we tried to consider issues related to drum-type grinding machines. And you make a choice to work on the device purchased in the store or make it with my own hands.
Every do-it-yourselfer who works with wood to some extent probably has a separate tool dedicated to sanding, whether on sanding machine or manually, but sometimes it happens that the part being processed has a round shape or it needs to be sanded inside. In this article I will tell you how the author made grinding drums with his own hands, with the help of which Finishing work will not be a burden.
To make this homemade product we will need the following materials:
*Wooden planks, their thickness may vary, for an average drum it is 15-20mm.
*Steel rod or ready-made bolt.
* Washers and nuts.
*Sandpaper.
* Joiner's and PVA glue.
*Crowns or so-called ring drills.
* Rubber bands for banknotes.
First step. In order to start work, we need to decide on the dimensions of the drum, after the dimensions are selected, we select a crown for that same size. Using a bit installed in a drilling machine, drill out 5 round blanks, you can change this quantity depending on the desired height and the thickness of the workpieces themselves.
Second step. Armed with PVA glue, glue the adjacent surfaces of the finished round blanks and clamp them to each other using a vice, maintain gluing accuracy so that one bar does not extend beyond the edges of the other. At this stage, the strength properties of PVA glue will be sufficient.
Wait for it to dry completely, then fasten the bolt in the middle into the drilled hole and tighten it on both sides with nuts, having previously thrown a washer on both sides.
Third step. This stage requires a grinding machine or sandpaper; the first method will be easier and faster. We clamp the bolt with the finished drum into a cordless drill and grind it with coarse sandpaper, gradually moving to a finer grain size, thereby giving smooth surface to our drum.
Fourth step. The final stage of assembly includes cleaning the drums from dust that was formed in the previous stage, as well as covering the surface with wood glue for gluing the grinding element. Using ordinary scissors, cut out a piece of sandpaper pre-marked to size and glue it to the adhesive surface of the drum, joint to joint, and so that it does not protrude while the glue dries, secure it temporarily with rubber bands for banknotes.
After that. Once the glue has completely dried, you can use the homemade product for its intended purpose, try the drums in action.
Thank you all and good luck with your DIY inventions and gadgets.
The vast majority of grinding operations in everyday life are carried out manually or using a drill. This is understandable. Buying expensive specialized equipment for use at home, where grinding operations tend to vary greatly in appearance, is not always advisable.
There are various devices for manual and mechanized grinding. All of them can be divided into two main types.
- Tools that directly perform the processing of the part are hand-held devices, which include sanding blocks (pads, whetstones) and grinding attachments for a drill or grinder, which are all kinds of support plates and drums.
- Devices that ensure the required position of the grinding tool relative to the part - guides, supporting surfaces, etc.
A separate type includes devices for dust removal, which, due to the abundance and harmfulness of grinding dust, should also not be neglected.
Hand sanders
When working manually, to ensure the necessary processing parameters, a variety of grinding devices are used.To the simplest hand-held devices include sanding pads, which may be called: sanding blocks, sanding bars, etc. Depending on their shape, they can be used to process both flat and shaped surfaces.
The sanding block consists of three main elements - a body with a working surface on which the sandpaper is stretched, a clamping mechanism that secures the sandpaper to the sandpaper, and a handle to which force is applied during sanding. The latter may be absent as an independent element; in this case, its role is played by the body. The clamping mechanism can also be replaced with other elements that perform its function, for example, Velcro.
There are many types of branded pads available, differing from each other in shape and method of attachment. emery cloth. The body is most often made of plastic, the working surface of which is covered soft material, helping to smooth out irregularities.
The simplest pads for grinding are easy to make yourself. Wood is best suited for this. It is advisable to paste over or cover the working surface with a soft material, such as felt.
Most simple design The bar consists of two pieces of board or chipboard, tightened together with screws - so that the skin covers the bottom piece, and its ends are clamped between the parts.
If you put in a little more effort, you can make a more functional block in which the skin will be clamped with a wing nut, which is much faster and more convenient than using screws for this.
For processing large surfaces, if for some reason a power tool is not suitable, it is best to make your own grinding “plane”. His possible design shown in the figure below. It is so simple that it does not need explanation. The dimensions of the device are determined by specific operating conditions - the parameters of the plane being processed and the physical data of the worker.
Sanding plane
For grinding edges located at an angle of strictly 90° to the adjacent surface, a device that allows you to ensure the required right angle will be useful. It is shown schematically; the specific implementation can be anything.
Device for sanding edges (end view): 1 - base, 2 - handle, 3 - side stop, 4 - stiffener, 5 - sanding paper, 6 - strip of felt.
One of the main tasks when making homemade bars is to securely attach the skin to them. In addition to mechanical clamps (using screws, nuts, etc.), you can use other methods of attaching sandpaper to homemade sanding blocks.
You can simply nail it at the ends with small nails. The method is easy to implement, but inconvenient if you have to change the skin frequently.
An acceptable way to secure sandpaper is by gluing it. Glues are suitable for this, making it relatively easy to separate the skin from the base when replacing it.
Sometimes they use wedges to secure the skins. Cuts are made in the block, into which the edges of the skin are tucked and wooden wedges are driven. Cuts and wedges can be of different sizes.
Accessories for drills and grinders
Manual grinding requires a lot of effort and time. For significant volumes of grinding work, it is advisable to use a power tool - a drill or grinder, in particular. To turn the latter into a grinding tool, they must be equipped with a suitable grinding attachment - a backing plate or a drum.
Sanding pads. These nozzles are a disk of plastic or rubber, to which an emery cloth is attached in the form of a circle. Plastic plates have a soft or not very soft layer between the base and the Velcro, for a better fit of the skin to the surface to be treated. The plates for the drill have a shank in the form of a rod, for angle grinders - a thread for screwing them onto the output shaft of the angle grinder. The grinding attachment for the angle grinder can be converted into a drill attachment by screwing an adapter with a shank into it.
But due to the rigidity of the grinder attachment, strictly vertical arrangement drill relative to the plane when grinding is practically impossible. When using a rigid plate (it’s easier to work with a flexible one), any slight tilt leads to the edge of the plate biting into the workpiece and the drill trying to escape from your hands, which leads to an increase in tilt and a deeper bite into the edge of the circle. This leads to clearly visible depressions on the treated surface. Therefore, only grinding attachments that can compensate for the tilt of the drill are suitable for the drill: either rubber, or with a thick soft layer between the plastic base and Velcro, or with a movable pin attachment.
Hard plates are only suitable for use with a fixed drill, such as the one shown below.
If you can’t find a suitable drill attachment for grinding on sale, and you have a hard attachment, then you can make a thick soft layer between the plastic base and the Velcro with your own hands.
The Velcro is carefully cut off with a stationery (construction) knife, and a large round sponge for washing the body is glued as a soft layer. When the sponge is compressed during the grinding process, the symmetry may be broken (the Velcro with the sandpaper moves in one direction), but at drill speeds (3000 rpm) this is not critical; it will not work with an angle grinder.
Combined attachments for grinding on a drill are produced, in which the shank can be in two positions relative to the working surface - be rigidly locked with it or have a degree of freedom (unlocked). In the latter case, the working surface of the tool has the ability to adapt to the inclination of the drill, resulting in processing without the formation of indentations. But the price of such devices is close to the price of orbital sanders.
To make the shank movable, a cone nut is twisted (in the photo below with a similar device, it is twisted to the chuck).
The skin is attached to the plates using Velcro. This method of fastening requires special sandpaper, on which a reciprocal layer of Velcro is applied.
Sanding drums. Sanding drums for a drill are a cylinder with a shank; sanding paper in the form of an endless belt (a strip of sandpaper glued together at the ends) or a strip of sandpaper with free ends is attached to the cylinder. Unlike the support plate, in which the working surface is located perpendicular to the axis of rotation, in drums it is located parallel to it.
To ensure that the skin sits tightly on the drums, the latter have different tension mechanisms. According to the principle of operation, there are two of them - increasing the outer diameter of the drum (used for an endless belt) and tensioning the abrasive belt using a special mechanism (used for open belts). An increase in the diameter of the drums is being implemented different ways- by pumping them up (for pneumatic models), by compressing them in the axial direction (for drums with rubber elements). The tension of an open tape can be done in different ways. This is most often done by using a rotating screw that tightens the ends of the sandpaper. Below are several options for drums with different types of skin tension.
A drum for endless sanding belts can be made by placing rubber pads between wooden discs. When the axial bolt is tightened, the rubber is crushed, expanding in the radial direction and securely fixing sanding paper, put on the drum.
Grinding attachments using a drill. Grinding parts with a plate or drum while holding a drill in your hands is not as easy as it might seem to someone who has never done it himself. In many cases, a better surface quality can be achieved by holding the tool stationary. Especially when processing small parts that are easy to manipulate by holding them in your hands. There are grinding attachments that allow you to secure a power tool, making it completely or partially stationary.
You can use proprietary drill guides, which are intended primarily for drilling, but can also be successfully used for grinding - mainly with a drum. You can work with them in two ways. By fixing the drill in the guide motionless and moving the workpiece relative to the tool (photo A below), or by moving the guides together with the drill relative to the workpiece, pressing the supporting surface of the guides against the latter (photo B below). In both cases, the tilt of the drum is eliminated, which ensures surface treatment at the desired angle.
You can independently make a simple sanding device from two boards, which allows you to ensure that the angle of the sanded edge in relation to the main surface is exactly 90°.
Removing dust. When sanding wood, a lot of dust is generated, which not only creates inconvenience, but is also harmful to health if inhaled. Dust must be dealt with. The easiest way to do this is to suck it out with a vacuum cleaner, placing the hose closer to the sanding area.
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Sanding various wooden parts- a necessity faced by everyone who wants to make repairs in their home, or create some decorative element with their own hands.
Of course, you can sand small parts with ordinary sandpaper, but to cope with a large amount of work, you should change the sanding to a grinding machine. It will help to significantly save time and quickly bring the part to the appropriate form. One of these useful devices is also a drum sander.
Classification and structure
Drum-type grinding devices belong to the calibration class machines. Such a grinder is most often used for woodworking, but other materials can also be processed with it.
A cylindrical grinding wheel (drum) allows you to calibrate boards and slats of various lengths and configurations. The workpiece can also be made from different materials: Chipboard, veneer, etc.
Structure of the grinding apparatus:
- Cylindrical grinding drum.
- Feeding device.
- Dust removal device.
- Working surface.
- Drum speed converter.
- The motor that drives the grinding cylinder.
- Bed for fastening key components of the machine.
- Drum height regulator.
- Operator protection device.
The main elements of the structure are listed here drum machine. Depending on the specific model device and the specifics of its purpose, the configuration may vary slightly.
Main device models
Drum-type machines can be purchased ready-to-use. There are several of the most popular and widespread brands for the production of these devices. It makes sense to present their individual models.
JET Company. The American company specializes in the production of modern machine tools of the most various types, including drums. In the line of its products there are several grinding machines with a cylindrical shape of the working circle.
- JET DDS-225. This machine is one of the most powerful devices of this type in the manufacturer's line. It is used both in home workshops and in small industries. Characteristic– double grinding drum. The cost of this machine is appropriate - from 150,000 rubles.
- JET 10-20 PLUS. A compact sanding device that allows you to process up to 50 centimeters of surfaces. Perfect for small home workshops. The cost does not exceed 25 thousand rubles.
- JET 16-23 PLUS. It is considered one of the most versatile machines of its type. It is used for processing building materials, kitchen appliances and even musical instruments. Most often, such a machine is used in small furniture production enterprises.
Corvette 57. A machine made in China, which is distinguished by fairly high build quality and wide functionality. The machine is designed for grinding flat surfaces wooden blanks and turning parts to the required sizes. The machine has a fairly affordable price - 24 thousand rubles.
In addition to these machines, there are also good options from German manufacturers. It is worth noting that, depending on the price, German companies also offer corresponding sets of capabilities for their devices. The minimum amount for which you can purchase a grinding machine in the basic configuration is 15-16 thousand rubles.
Video: step by step production drum grinding machine.
How to make a grinding machine with your own hands?
If you can’t pay quite a lot of money for a decent version of a drum sanding machine, then you should try to make it yourself. For a person who is well versed in mechanics, this is not a very difficult task. In addition, this way you will be able to save significant financial resources.
In order to assemble a drum sanding machine at home, you need to acquire the following parts:
- Grinding drum. Cylindrical shape the device can be created on the basis of “garbage” building materials. For these purposes, they often use even pieces wooden blocks, which are evenly attached to a special metal axis using glue. In this case, special attention should be paid to the tight fit of these bars to each other. The drum can also be made on the basis of a polyvinyl chloride pipe with a diameter of up to 10 cm, which is placed on an iron rod with a diameter of 1.5-2 cm. It should be slightly shorter in length than the rod itself. We insert special plugs with holes for the rod into the ends of the pipe. We recommend securing the plugs with screws. We thread and secure the rod. We wrap a thick layer of rubber onto the pipe, onto which the sandpaper will be attached.
- Engine. It is best to use a working motor from an old washing machine (as well as pulleys, belts, etc.). The optimal motor power should be from 200 to 300 W. It is desirable that the motor is also asynchronous and single-phase. RPM level – 2000-3000.
- Frame. The design should be simple and convenient. It is best for the machine body to consist of two side panels, a spacer and the table itself. Special attention You should pay attention to the strength and rigidity of the work table, which should not be deformed when the workpiece being processed is pressed onto the drum. The desktop should consist of a base and a movable part.
After the main parts of the machine are assembled separately, you can proceed to final assembly the entire apparatus. First of all, you should attach the motor to the bottom of the machine body in place drilled holes. The grinding drum is installed in the upper part of the housing and is attached to two bearings that are located on the side walls of the housing.
Then we attach special pulleys to the drum and motor and pull the drive belt. After all the necessary preparations with electrical wires, we fasten the desktop with special bolts that will keep it at the required level. Experts strongly recommend installing a protective casing on the machine.
It is worth noting that the independent creation of a drum grinder is also not without certain costs. This is primarily about your time, but the machine will cost you less than the factory machine only if you have a working motor. Without an engine and certain skills to create cheap analogue branded machine is almost impossible.
