Homemade herb grinder. Garden shredder - a solution to the problem of waste in the country Do-it-yourself branch shredder for a tractor (drawings)

Owners of suburban areas know that caring for trees and shrubs requires constant pruning of unnecessary, dried and old branches. Most often, a pile of brushwood is burned, polluting the entire area with smoke and small particles of soot. But twigs processed for compost are excellent organic fertilizer! The only downside is the rotting process, which is extended over time, and the unaesthetic pile of garden wood, growing in breadth and height. An electric garden shredder (shredder or chitter) will help reduce the mountain of branches tenfold and speed up the transformation of brushwood into humus. Today there are many models of crushing devices for these purposes on the market, however, the price of such units is quite high. We suggest making the machine yourself, especially since a significant part of the materials can be found in everyone’s garage or on a pile of old scrap metal.

Design and principle of operation of an electric garden shredder

A garden shredder will help you get rid of branches and other organic debris.

To make your own electric wood chipper, you need to know its structure and operating principle. In the future, this will help in designing your own design and assembling the unit.

The garden shredder (chitter), regardless of the specifics of its operation, is designed simply and consists of the following parts and components:

engine;
metal frame;
working shaft(s);
cutting block;
receiving box;
flexible or gear transmission;
protective casing.

For convenience, the unit is equipped with wheels, which make it easier to move the structure around the garden plot.

Garden shredder diagram

The branch chopper works as follows. The torque from the electric motor is transmitted to the working shaft by means of a V-belt, chain or gear transmission. The ratio of pulleys, sprockets or gears is selected so that the gear ratio can provide a rotation speed of the main axle of at least 1500 rpm. The chopping of branches fed into the receiving box is carried out with knives rigidly fixed to the working shaft.

There are crushing plant designs using two working shafts moving in the opposite direction. This scheme allows you to increase the productivity of the unit and makes it possible to process branches of increased size.

Due to the high rotation speed, intensive grinding of wood occurs, which, after grinding, is sent to compost heap. If we consider the design of a shredder through the prism of similar mechanisms, then its operating principle is similar to the operation of a meat grinder or blender. Despite the rather primitive design, when using a durable blade block and an electric motor with a power of 3 - 5 kW, the unit can process not only twigs, but also tree trimmings more than 5 cm thick into chips. There are also garden chitters that chop ten-centimeter branches, however, their design much more complicated, and the principle of operation is more perfect.

Classification of wood chippers

When planning to create a garden chitter, you must have an idea of the thickness of wood waste you will have to deal with. Since all organic waste shredders can be divided according to the power of the electric motor and the operating principle of the blade unit, the maximum diameter of wood trimmings affects the choice of design, operating parameters and technical specifications unit.

By type of power plant used

Garden shredders can use either electric motors or motors. internal combustion. The advantages of the first are simplicity, compactness, ease of use. However, with the help of a gasoline or diesel power unit you can create a truly mobile installation, and their power allows you to process branches more than 10 cm thick.

Shredders with an internal combustion engine have high power and are more mobile than electric units

In a homemade design it is easier to use an electric motor. In this case, there is no need to use additional components to ensure starting and warming up the engine, the final cost of the mechanism is reduced, and the installation and operation of the equipment is simplified.

When choosing an electric power unit, the following factors must be taken into account:

It should be noted that powerful electric motors require connection to three phases. If a conventional two-phase 220 V network is used, then the best way out of the situation is a gasoline or diesel power plant. Its power is 5 - 6 liters. With. will be sufficient in most cases.

According to the design of the knife block

The design of the blade block of a garden shredder determines the diameter of the branches that can be shredded, and what size of processed chips will be obtained at the exit of the unit. For example, the simplest devices can process only thin branches, cutting them into pieces of 2 to 10 cm, while more complex devices can crush thick branches, grinding them into dust or producing pieces 10 - 15 cm long.

The design of factory knives is most often presented in three versions:

disk-knife block, which is used for grass and twigs no more than 2 cm thick;
The blade-disc garden shredder has a simple design, but is unable to process thick branches.
a milling-type cutting system that can easily cope with thick branches up to 8 cm. The only condition is that the raw material must be dry, otherwise the cutters become clogged with wood fibers and require constant cleaning;
The use of cutters allows you to work with any organic waste
auger and turbine-milling cutting units are the most productive and versatile - they can equally easily process raw and dry fairly large branches into chips.
The use of combined turbine-milling or auger cutting units provides the device with high productivity

In home-made designs, it is difficult to replicate a screw or turbine-milling design, so craftsmen take one of the following cutting block designs as a basis:

two-shaft system with several knives;
disk-knife assembly;
typesetting package of circular saws or cutters.

All three options are available for repetition at home and require a minimum of costs, since their production uses parts and assemblies from old automobile and agricultural equipment, sections of corners, pipes, etc. As for purchased elements, you can’t do without them . If there is no electric motor, circular saws or cutters, as well as other parts in stock, then you will have to buy them.

Video: Homemade blade-disk chopper

Advantages and disadvantages of a homemade device

A homemade garden shredder has many advantages:

low cost compared to factory-produced equipment;
the ability to create designs for specific purposes. For example, processed branches are often used as fuel, which requires special adjustment of the unit to produce larger-sized cuttings;
in a homemade design, you can use parts that can easily be found in any garage or workshop;
a homemade shredder can be used not only for crushing branches, but also for chopping grass, vegetables and fruits - as pet food or for recycling purposes;
at self-production equipment, you have the opportunity to use your mind and erudition, apply your own skills and abilities. A successfully working structure will serve as proof of your worth as an owner, increase self-esteem, and raise authority among neighbors and acquaintances.

As for the shortcomings, there are practically none. The only thing I would like to note is that equipment of this type belongs to the category of dangerous, therefore, when manufacturing the unit, it is necessary to provide structural elements, ensuring risk reduction, and during operation adhere to the rules for handling such mechanisms.

Making a garden crusher at home with your own hands

For the manufacture of a recycler wood waste You will need the ability to operate a welding machine plus some experience in plumbing. Creating a garden cheater takes place in several stages. At the first stage, they design the structure based on their own requirements and the availability of materials. On others, they begin to manufacture individual parts, assemble, configure and test the unit.

Required materials and tools

To build a wood waste shredder you will need:

You will need the most common tool, which any craftsman will always have:

welding machine;
electric drill with a set of metal drills;
angle grinder (colloquially “grinder”);
sharpening machine (emery);
set of wrenches;
hammer;
metal ruler, tape measure;
metal marker (scriber).

In addition, the finished product for protection against atmospheric influences, and also in order to improve aesthetics, it is necessary to paint, so you will need a rust converter, primer and any enamel for exterior use.

Preparatory work, drawings

As previously mentioned, the design of a garden shredder includes a frame, an electric motor, a housing, a working shaft (one or more) with installed knives and a receiving bunker. The final appearance of the finished product directly depends on the chosen scheme and the features of its implementation.

The most important parameter that is taken into account when designing and making drawings is the location of the working shaft and the type of knives used.

A drawing of a garden shredder using two shafts looks like this: a pair of steel plates with a thickness of at least 10 mm are taken as the body, in which holes are milled for ball bearings. The knives are fixed offset relative to each axis of the mechanism. The synchronous rotation of the shafts is ensured by gears attached to them, to which torque is transmitted from the electric motor. The design can use both chain and belt. The calculation of the center gap is based on the dimensions of the knives, which, in turn, determine the maximum thickness of the processed wood.

For a mechanism with two shafts, it is not so much the speed of rotation that is important, but the amount of torque. Therefore, it is better to take an electric motor with a power of at least 4 kW and 3000 rpm and, due to the gear ratio, reduce the rotation speed to an acceptable value.

When making a knife disk chitter, fewer parts will be required, but the size of the branches that it can crush will be smaller. A multi-lane pulley is used to change the rotation speed, and the quality of grinding can be adjusted by installing knives various widths. The disk with attached knives does not have to be installed strictly vertically - it can be at any angle. It all depends on the designer’s imagination and considerations of convenience and personal preferences.

Drawing of a blade-disc chopper

To make a shredder with a knife block from two dozen circular saws, you will need one shaft, a pair of bearings in housings and a belt drive. It must be said that the performance of this design depends on the rotation speed of the cutting package, so a high-speed electric motor and a pair of pulleys of the same diameter are best suited for it.

Drawing of a chopper made from circular saws

Scheme of a chopper made from circular saws

The performance characteristics of the structure can be significantly improved by replacing circular disks with cutters of different sizes from metal-cutting machines. In this case, the speed of the mechanism is reduced, while simultaneously increasing the amount of torque.

Instructions for making a wood chipper with two working shafts

Work on creating a shredder for suburban area are divided into several steps, which include manufacturing the frame, assembling the cutting unit, welding the receiving funnel and protective casing, as well as installing parts and assemblies on the base.

Parts for making a twin-shaft garden shredder

Two blanks 40 cm long and four 80 cm long are cut from a profile pipe or metal corner. They will be used for welding the base of the structure - the frame, or, in professional terms, the bed.
A rectangular frame is welded from two long and two short sections, after which internal crossbars are welded to it in such a way as to install a knife block on them.
If you plan to install wheels on the chopper, then racks are additionally mounted on the frame to install the axle.
The production of working shafts is ordered from a turner. At installation of four knives use square blanks on which seats for bearings and pulleys are machined. If there are three cutting elements, then the blanks are machined along the entire length, after which three flats (flat cuts) are made on them and holes are drilled for attaching the blades.
Good knives can be made from car springs
Shredder knives are made from springs from trucks or minibuses (such as Gazelle). To do this, cut the sheet into pieces of the required length, heat it in a forge and level it with a hammer. Next, the mounting holes are drilled and the wedge edge is formed. By knocking down excess metal on sandpaper, you achieve cutting edge angles of 35 to 45 degrees on each blade. After this, the knives are hardened and finely sharpened sharpening machine.
Holes are cut out in the metal plates used as the housing of the cutting unit for installation of bearings. It is best, of course, to use the device laser cutting at some enterprise or, at worst, with a plasma cutter. If there is no access to such equipment, then you can resort to using a gas cutter or welding machine. The disadvantage of the latter method is that the resulting holes will be uneven, so their edges will have to be sanded for a long time and carefully.
The bearings are mounted, after which they are secured against longitudinal displacement with round plates-washers, which are attached to the outer surface of the housing.
The work of the garden cheater is associated with the formation of dirt and dust, so closed ball bearings are used in its design.
The shafts are installed, after which the side walls of the housing are tightened using studs and nuts.
Assembling the cutting drum housing
They begin to manufacture the receiving hopper. To do this, four trapezoid-shaped blanks are cut out of a 2-mm steel sheet, which are connected to each other by welding or rivets. In the tapering part of the box, 4–5 cm bends are made with holes for fastening.
For safety reasons, the length of the receiving hopper is increased so as to prevent the operator’s hands from getting into the action area of the cutting elements.
The grinding drum is attached to the frame, after which the drive gears are mounted on the shafts.
Gears provide the shafts with counter-direction of movement
The electric motor is mounted and a chain or belt drive is installed.
From thin sheet metal construct a protective casing covering the rotating parts of the drive.
A feed box is mounted on the chopper.
Installation of the receiving box

The method of fastening the receiving box must make it possible to remove it to remove large, non-recyclable wood debris, clean the mechanism, sharpen knives, etc.
Make electrical connections.
Garden shredder assembly

In order to protect the cheater from corrosion, all its parts are cleaned with a wire brush and treated with a rust converter or other protective agent. After this, the unit is primed and painted using a spray gun or manually.

Shredding branches for heating purposes

The operation of an electric garden shredder, manufactured in compliance with all safety requirements, does not present any difficulties. However, during operation of the installation, you should adhere to a few simple rules and regulations.

When chopping branches, you should only wear safety glasses or a mask, a hat and high shoes. It is best to feed branches bare hands, or, at worst, wearing tight-fitting gloves.
Do not place your hands below the opening of the loading hopper. If necessary, you can push the brushwood through the next portion of twigs or a special stick with a branch at the end.
The size of the branches should not exceed half the center distance between the shafts. When choosing wood waste intended for disposal, it is necessary to take into account the width of the knives used.
It is necessary to exclude the possibility of pieces of glass, stones, metal and plastic debris getting into the receiving hopper both during operation of the unit and during storage.
Raw branches lend themselves best to shredding on a two-shaft unit. If it is necessary to dispose of parts of rhizomes, they must be cleared of soil.
If wood debris becomes jammed in the working drum, the device is immediately disconnected from the network. Further removal of stuck debris is carried out only when the equipment is completely de-energized.
During operation, special attention should be paid to the location of the power cable - it should not fall into the area where crushed products are released.

Reliable and durable operation of a wood chipper depends not only on correct operation, but also on storage conditions. Therefore, after each use, the shredder must be cleaned of any remaining processed products and stored in a shed or under a shed. In addition, you will need to monitor the sharpness of the cutting edges. Well-sharpened knives will make work enjoyable and reduce the load on the machine components. If the operating rules are followed, the garden shredder will provide safe and trouble-free operation for many years, making it easier to care for the area, bringing benefit and pleasure.

Thanks to my varied hobbies, I write on different topics, but my favorite ones are machinery, technology and construction. Perhaps because I know many nuances in these areas not only theoretically, as a result of studying at a technical university and graduate school, but also with practical side, because I try to do everything with my own hands.

An inevitable companion garden plot is plant debris in the form of grass and branches. It is not advisable to throw away or burn such waste, because it can be used to obtain natural fertilizer. It is enough to grind it to the state of wood chips. A garden shredder can easily handle this task. However, if there is no financial opportunity to purchase it, then you can make a garden shredder with your own hands. This article will tell you in detail how to do this.

Selecting a device based on technical parameters. How to make a shredder from scrap materials yourself.

As can be seen from the list presented, the design of a shredder with a disk mechanism is the simplest and most affordable. However, such a shredder can shred branches with a diameter of only 20 mm. But a chipper with two shafts can easily cope with large wood with a diameter of up to 80 mm.

Shredder assembly

Having all the necessary elements, you can safely begin to create the design of a garden branch shredder with your own hands based on the completed drawing. Assembling a garden shredder, regardless of the type of mechanism design, consists of several successive steps:

Frame installation.
Creating a bunker.
Assembling the grinding mechanism.
Installing the engine and grinding device on the frame.

Creating a chopper with a set of circular saw blades

The grinding mechanism of such shredders consists of circular saws, which are alternately mounted on the shaft with separating washers. Each disc has many teeth that can handle even hard wood. Therefore, it will process soft grass, tops and leaves in a matter of minutes. When saw teeth become dull, they can be easily replaced with new ones.

The shaft for the chopper can be machined using lathe or use a ready-made one from an old car's gearbox. The distance between adjacent saws should be about 10 mm. If the gap is smaller, it will reduce the working area of the shredder. If you create a larger gap, this will encourage small branches to get stuck.

Useful advice! The saw teeth should not be placed on the same line when fixing them on the shaft. It is better to install them chaotically. This reduces the load on the shredder shaft and electric motor.

It is better to use an electric motor, which is practically silent during operation and does not emit harmful substances into the atmosphere. To crush coarse material, you can use it, which has great power. The engine should be placed on a movable support so that the drive tension can be adjusted.

The frame for the shredder can be welded using channels, angles or profiled metal pipes. A thrust beam made of a metal profile can be welded to the base of the structure, which will become a support for stems and branches during crushing. When creating pedestals for bearings, it is important not to distort them. The axes of the motor and shaft must be in parallel planes.

The design of the bunker deserves special attention. It can be made from sheet metal. The container should be strong enough to withstand the impact of flying chips from branches. Using a movable support plate in the body of the hopper, it is possible to adjust the size of the chips. So, smaller fragments are suitable for fertilizer, and larger chips are suitable for kindling.

The size of the inlet socket should be longer hands to protect them from damage. This also makes it possible to guide the branches into the shredder at a convenient angle.

This DIY garden shredder of branches and grass can cope with both soft waste and hard, thick wood. However, its main problem is the clogging of the space between the saws, which needs regular cleaning.

Creating a shredder with a blade disc

You can create such a grass chopper with your own hands from scrap materials. Since it is designed for crushing soft debris, its design will be very simple, however, it will not have a high strength rating. You can weld a bunker from sheet metal, or you can take an ordinary metal bucket. A casing from an old fan will also work.

To create a cutting system on a metal disk, knives are inserted into special slots, which can be pre-made from a spring sheet from a car. The disk is installed on the shaft. Next is the receiving box. A low-power 1 kW motor is suitable for such a shredder. All the details of creating a garden electric herb shredder with your own hands can be seen in the videos offered on the Internet.

Assembly instructions for a twin-roll shredder

Work begins with creating a frame. To do this, using an angle grinder, two blanks 80 cm long and four pieces 40 cm long are cut from a profile pipe. Next, short sections are welded between the two long blanks at right angles. Two internal parts should be placed at such a distance from each other to ensure reliable installation of the grinding drum.

Useful advice! For the device to be mobile, the structure must have wheels for movement. To do this, two racks are welded to the frame, onto which an axle with wheels is attached.

The next step is to create the shafts for the chopping drum. If you plan to install four knives on one shaft, then we use a square metal blank. We make both ends of it round so that they can fit into the bearings. For three knives you will need a round blank in which the central part is sharpened. Three flat cuts are made in it for the subsequent installation of knives.

To create knives, you can take a small piece of a Kamaz spring sheet. Holes for bolts are made in the knives. Then it should be done on a sharpening machine, where the cutting edge angle is selected with a value of 35-45 degrees. Next, the sharpened knives are applied to the shaft and their attachment points are marked, in which holes are created, and the thread is cut.

Next, we proceed to create the grinding mechanism. In two metal walls, using a welding machine, round holes for installing bearings. Using special pads and bolts, we install the bearings inside the metal walls. We insert the shafts into the bearings, securing them securely. They must be located at a sufficient distance to prevent them from touching. Next, the drum walls are connected using threaded metal studs and nuts.

Now let's start creating the receiving bunker. To do this, four parallelepipeds are cut from thin sheet metal. Next, each edge is bent by 4 cm. A short section in one direction, a long section in the opposite direction. We connect all the parts using self-tightening rivets or welding. Holes for fastening are made on the bent edges at the base of the box.

Now gears are put on the shafts to synchronize the movement, and the entire structure is installed on the frame and secured with bolts. Then the motor is installed, which is connected to the shaft by a belt drive or chain. It is better to take an engine of high power, but with a low number of revolutions. At the end, the receiving hopper is installed and secured. A protective cover is then placed on all rotating parts of the shredder to prevent foreign objects from entering the shredder.

The main advantages of such a unit are its high power and technical ability to chop thick branches with a diameter of 20 to 80 mm. This will depend on the number of knives and the number of revolutions. Numerous websites on the Internet provide detailed recommendations on how to make a branch chopper with your own hands. Video examples more clearly display the entire assembly and installation process homemade device.

How to make a shredder from scrap materials

Many thrifty and thrifty owners are in no hurry to throw away old tools and household appliances. They find new uses for them. It’s worth showing a little imagination, using logic and ingenuity, and from improvised tools and old parts you can create a real helper in the household. Let's look at some simple options for making a homemade chopper of branches and grass from simple and affordable materials.

Shredder from an angle grinder and a vacuum cleaner

One of these homemade designs is a homemade garden shredder made from an angle grinder, an old vacuum cleaner and lawn mower blades. One famous inventor, Vladimir Belyaev, proposed his own branch chopper, the video of the creation of which inspired many to modernize this idea and offer their own vision when creating a dacha assistant. Next, let's look at one of the interesting and popular options.

To create a simple but productive design you will need an old working vacuum cleaner, a Makita grinder with a power of 3.2 kW, blades from a lawn mower, a stable wooden base, a receiving funnel and a metal table with a vertically welded sheet of metal.

The receiving funnel is mounted horizontally on a vertical metal sheet welded to the table. This sheet must be thick to support the bolted angle grinder and the knives mounted on it. If the seat of the three-blade blades from a lawn mower is not compatible with an angle grinder, then it is necessary to sharpen them so that the blades fit securely. To prevent the crushed mass from getting stuck between the knives, a pipe from an old vacuum cleaner is attached to the metal sheet, which supplies air. It is advisable that the grinder and the vacuum cleaner turn on at the same time.

The metal table is located on a wooden stationary base. You should also install a protective cover that will prevent the reverse movement of chopped branches.

Such a simple version of a garden shredder with your own hands, a video that clearly confirms this, can be easily created at your dacha, without complicated work steps and purchasing additional materials.

Washing machine shredder

A garden shredder can be created from an old washing machine. To do this, you will need a body and engine from the equipment, an old saw, a bucket and other parts, and tools for fastening the structure.

A side hole is made in the body of the old washing machine to allow recycled materials to exit. Knives, which can be made from pieces of an old saw, are attached to the bottom of the container using a special sleeve. An existing one built into an old washing machine is used as an engine. A receiving container for crushed waste is installed near the side opening.

Drill shredder

Another rudimentary invention is a homemade shredder using an electric drill. The operating principle of this mechanism resembles a vegetable cutter.

To create the design you need to take an old stool. Drill a hole with a diameter of 12 mm in it. WITH reverse side The stool is attached to a housing with a bearing. A bucket with a hole of the same diameter is installed on the stool and secured with self-tapping screws. A bearing is inserted into the hole, onto which a shaft is mounted with high-speed steel knives attached to it. A dual-mode drill is connected to the end of the shaft from the bottom of the stool via a quick-release chuck.

Soft raw materials are thrown into the bucket and an electric drill is started. After thoroughly grinding to the desired state, the mulch is removed. This design is designed for a small volume of recycled waste.

The process of making and sharpening a knife deserves special attention. One-sided sharpening should be performed. The sharpened plane is located below. For chopping freshly cut grass, the diamond-shaped knife shape is ideal, in which the blades can be rounded. This allows the grass to slide freely over cutting edge chopping knife without getting wrapped around it.

From the proposed options, we can conclude that you can create a garden shredder with your own hands from any available material. It is enough to have an electric motor adapted for a 220V network, any round container of sufficient size, a steel sheet, a hacksaw for wood or saws from an old lawn mower to create a cutting mechanism.

Subtleties when choosing an engine for a shredder

A certain engine power provides the required performance of the shredder. When choosing an engine, you should be guided by some important rules:

For small branches, you should choose a motor with a power of at least 2 kW. The higher the power rating, the greater the productivity and technical capability of the shredder.
To grind soft waste in the form of grass and leaves, a 1.5 kW motor will be sufficient.
The power of a gasoline engine should not be less than 6 hp.
Should not be used too much powerful engines more than 3.5 kW. They consume a lot of electricity, but the maximum performance of the unit is not achieved.
Engine speed for chopper performance great influence does not provide. What is important here is the frequency of rotation of the knives, which is ensured by V-belt transmission.
To reliably chop branches, the blade shaft should be set to a speed of no more than 1500 rpm. This occurs due to the correct selection of the diameters of the driving and driven pulleys.

Useful advice! It is better to make pulleys for belt drives with 3-4 grooves. This will allow you to change the speed on the shaft by moving the belt, which is necessary for various conditions chopper operation.

The main advantages of homemade garden shredders

A homemade shredder does not require too much care. It can be used for more than just shredding grass, leaves and branches. It will ideally recycle any household waste. It can be used for crushing fruits fruit trees for subsequent preparation of puree, jam or homemade wine.

Homemade shredders can handle branches with a diameter of up to 100 mm, while factory units simply will not allow such large plants to pass through. There is also no need to monitor the moisture content of raw materials for processing. But for factory shredders such negligence is unacceptable. Since in most models the engine is located at the bottom of the structure, the possibility of moisture getting on it must be excluded, which will inevitably lead to breakdown.

An important argument in favor of a homemade device is the cost of the entire structure, which will be much lower than the price of a finished shredder. This also applies to replacing a failed part, which will not be expensive.

In addition, a homemade garden chipper differs in its degree of productivity. All garden waste that falls on the grinding mechanism is instantly processed into small chips.

As can be seen from all of the above, you can create a reliable and faithful assistant for shredding garden waste with your own hands from scrap materials. It is enough to have some skills in plumbing and have parts in your garage old technology, necessary tools and materials. Next, having chosen the most appropriate method for yourself, sketch out a drawing of a branch chopper with your own hands. Videos of various versions of a homemade shredder can be viewed on the Internet. Based on the drawing, prepare all the necessary elements and begin assembling the chopper.

If you are not sure about own strength, currently you can buy a homemade wood chipper from the proposed options, which will meet all the requirements and satisfy your wishes at an affordable price.

An inevitable companion of a garden plot is plant debris in the form of grass and branches. It is not advisable to throw away or burn such waste, because it can be used to obtain natural fertilizer. It is enough to grind it to the state of wood chips. A garden shredder can easily handle this task. However, if there is no financial opportunity to purchase it, then you can make a garden shredder with your own hands. This article will tell you in detail how to do this.

A garden shredder, also known as a shredder or chipper, greatly facilitates the process of caring for summer cottage plot. With its help, you can easily clear the area of branches and grass. Recycled raw materials can be placed in compost pit to obtain natural fertilizer. It is advisable to use the resulting small wood as firewood for heating the house. Shredded fruit tree chips are ideal for smoking meat.

The design of a garden shredder is quite simple. It consists of the following main parts:

bunker;
drive;
grinding mechanism;
metal frame with a protective casing.

Some models may be equipped with additional elements:

a hopper for crushed organic waste;
pusher;
a sieve to regulate the woodchip fraction.

The operating principle of any chopper is the same as that of a meat grinder and is as follows. When the shredder is turned on, the engine starts, which drives the working shaft equipped with a cutting mechanism. At this time, garden waste enters the receiving funnel and is crushed into fine chips using a cutting device.

Useful advice! When carrying out work related to the processing of garden waste, you should use products personal protection– glasses, gloves, etc.

Grinding mechanism

Before you start creating a homemade shredder, you need to clearly determine the type of waste that it will process. This directly depends on his design features and performance characteristics. Garden shredders are classified according to three main parameters: the type and power of the engine and the type of chopping mechanism.

The following options for the grinding mechanism are available:

milling, for processing hard wood;
universal knife;
roller, for grinding thin branches of trees and shrubs;
with rotating turbines for chopping thick branches;
hammer, for recycling thin branches;
trimmer, based on the use of fishing line, for soft debris.

At self-assembly For the chopper, preference is given to a knife system or a combination of circular saws. You can make a two-roll design, in which two or three knives are installed on a massive disk and rotate towards each other.

Engine type and power

The shredder can be equipped with an electric or gasoline engine. Each of them has its own important advantages and some disadvantages. A garden shredder powered by gasoline is more mobile. Its operation does not depend on the power source. It is capable of processing thicker large branches. However, such chippers are more bulky and heavy. In addition, they emit harmful substances into the atmosphere during their activities.

Shredders with an electric motor are lighter and more convenient to use. However, they are inferior in terms of power and depend on energy resources.

The ability to process a certain type of garden waste depends on the engine power. For small volumes of waste, where the diameter of the branches does not exceed 20 mm, a 1.5 kW motor is sufficient. If it is necessary to grind branches 20-40 mm thick, then it is advisable to use a motor with a power of at least 3.5-4 kW. Shredders equipped with a 6 kW motor can cope with large wood 100-150 mm in diameter.

The next design feature of shredders is the type of drive. This function can be performed by a chain, belt or the motor shaft itself, on which the knife mechanism is fixed.

Steps to creating a DIY garden wood chipper

Creating a shredder with your own hands is a very labor-intensive process that requires the master to have technical knowledge and high level practical skills. All work consists of two stages. The first, preparatory, consists of creating a drawing of a garden shredder with your own hands and purchasing the necessary materials. The second stage is the actual assembly of the shredder.

Creating a Shredder Drawing

The drawing can be done by hand or using a special design program on a computer. The main structure of the shredder consists of a hopper, a frame, a motor, a shaft with a blade mechanism and a protective casing.

Examples of do-it-yourself drawings of wood chippers clearly show that various crushing mechanisms can be used for the cutting system.

If you use a set of circular saws, the drawing of the chopper will be quite simple. A shaft with 15-30 fixed circular saw blades is installed on a metal frame, which is driven by an engine using a belt drive. For this purpose, pulleys are located at the ends of the shaft and motor. As the do-it-yourself shredder drawings show, branches for heating a house are shredded precisely thanks to such a cutting system.

Useful advice! For more efficient work shredder, thin dividers made of plastic or metal should be installed between the circular saws.

To create a shredder with a knife disk shredding system, the drawing indicates the diameter of the cutting disk, the number of knives and their location. The disk itself can be placed vertically or at some angle. The number of knives affects the degree of grinding. There can be from 1 to 3 pieces.

There is an option to create a chipper with two shafts. You can see this grinding system in the video. Drawings of a do-it-yourself wood chipper with a two-roll cutting system are distinguished by the presence of two shafts with knives, which are located between metal plates. Each shaft is equipped with 3-4 knives. The knives themselves are secured with bolts and are offset to the side relative to the center of the shaft.

Four bearings are fixed in the holes of the metal plates, which are responsible for the free rotation of the shafts. And two gears driven by the engine ensure their synchronous rotation. Torque from the engine to the drive is transmitted using a chain or belt drive. The distance between the shafts is selected based on the width of the knives and the thickness of the branches.

Useful advice! To chop small branches and grass, electric motors with a high number of revolutions are required. And for chopping larger branches, strength is important. Here it is necessary to reduce the number of revolutions for powerful engines.

Necessary materials for making a chopper

To make a garden chipper, where the chopping system is a set of circular saws, you need to purchase the following components:

circular saws in the amount of 15-20 pcs. diameter 18 cm;
engine;
2 pulleys;
2 bearings with fastening;
metal washers in the amount of 17-22 pieces up to 5 mm thick for separating circular saws;

profile pipes to create a frame;
sheet metal about 2 mm thick for the hopper and casing.

For a shredder with a blade disc you will need:

engine;
sheet metal 2 mm thick;
sheet of metal and blades for the disc.

To create a shredder with two shafts, you need to purchase the following materials:

gasoline or electric engine;
two metal plates 10 mm thick:
a pair of gears to ensure synchronous movement of the shafts;
a gear or pulley for transmitting torque from the engine to the shafts;
pulley for the motor shaft;

5 bearings with fastenings;
chopping knives;
profile pipes to create a frame;
sheet metal with a thickness of at least 2 mm to create a receiving hopper and a protective casing.

Shredder assembly

Frame installation.
Creating a bunker.
Assembling the grinding mechanism.
Installing the engine and grinding device on the frame.

Creating a chopper with a set of circular saw blades

The shaft for the chopper can be turned on a lathe or used ready-made from the gearbox of an old car. The distance between adjacent saws should be about 10 mm. If the gap is smaller, it will reduce the working area of the shredder. If you create a larger gap, this will encourage small branches to get stuck.

Useful advice! The saw teeth should not be placed on the same line when fixing them on the shaft. It is better to install them chaotically. This reduces the load on the shredder shaft and electric motor.

It is better to use an electric motor, which is practically silent during operation and does not emit harmful substances into the atmosphere. To crush coarse material, you can use a walk-behind tractor, which has great power. The engine should be placed on a movable support so that the drive tension can be adjusted.

The size of the receiving socket should be larger than the length of the arms to protect them from damage. This also makes it possible to guide the branches into the shredder at a convenient angle.

Creating a shredder with a blade disc

Assembly instructions for a twin-roll shredder

Work begins with creating a frame. To do this, using an angle grinder, two blanks 80 cm long and four pieces 40 cm long are cut from a profile pipe. Next, short sections are welded between the two long blanks at right angles. The two internal parts must be spaced at a sufficient distance from each other to ensure secure installation of the grinding drum.

Useful advice! For the device to be mobile, the structure must have wheels for movement. To do this, two racks are welded to the frame, onto which an axle with wheels is attached.

To create knives, you can take a small piece of a Kamaz spring sheet. Holes for bolts are made in the knives. Then you should sharpen the knives on a sharpening machine, where the cutting edge angle is selected with a value of 35-45 degrees. Next, the sharpened knives are applied to the shaft and their attachment points are marked, in which holes are created, and the thread is cut.

Next, we proceed to create the grinding mechanism. Using a welding machine, round holes are made in two metal walls for installing bearings. Using special pads and bolts, we install the bearings inside the metal walls. We insert the shafts into the bearings, securing them securely. They must be located at a sufficient distance to prevent them from touching. Next, the drum walls are connected using threaded metal studs and nuts.

How to make a shredder from scrap materials

Shredder from an angle grinder and a vacuum cleaner

One of these homemade designs is a DIY garden shredder made from an angle grinder, an old vacuum cleaner and lawn mower blades. One famous inventor, Vladimir Belyaev, proposed his own branch chopper, the video of the creation of which inspired many to modernize this idea and offer their own vision when creating a dacha assistant. Next, let's look at one of the interesting and popular options.

To create a simple but productive design, you will need an old working vacuum cleaner, a Makita grinder with a power of 3.2 kW, blades from a lawn mower, a stable wooden base, a receiving funnel and a metal table with a vertically welded sheet of metal.

The metal table is located on a wooden stationary base. You should also install a protective cover that will prevent the reverse movement of chopped branches.

Washing machine shredder

Drill shredder

Another rudimentary invention is a homemade shredder using an electric drill. The operating principle of this mechanism resembles a vegetable cutter.

To create the design you need to take an old stool. Drill a hole with a diameter of 12 mm in it. A housing with a bearing is attached to the back of the stool. A bucket with a hole of the same diameter is installed on the stool and secured with self-tapping screws. A bearing is inserted into the hole, onto which a shaft is mounted with high-speed steel knives attached to it. A dual-mode drill is connected to the end of the shaft from the bottom of the stool via a quick-release chuck.

The process of making and sharpening a knife deserves special attention. One-sided sharpening should be performed. The sharpened plane is located below. For chopping freshly cut grass, the diamond-shaped knife shape is ideal, in which the blades can be rounded. This allows the grass to slide freely along the cutting edge of the chopper blade without getting wrapped around it.

Subtleties when choosing an engine for a shredder

A certain engine power provides the required performance of the shredder. When choosing an engine, you should be guided by some important rules:

For small branches, you should choose a motor with a power of at least 2 kW. The higher the power rating, the greater the productivity and technical capability of the shredder.
To grind soft waste in the form of grass and leaves, a 1.5 kW motor will be sufficient.
The power of a gasoline engine should not be less than 6 hp.
Do not use overly powerful motors over 3.5 kW. They consume a lot of electricity, but the maximum performance of the unit is not achieved.
The engine speed does not have a big impact on the performance of the shredder. What is important here is the rotation frequency of the knives, which is ensured by a V-belt drive.
To reliably chop branches, the blade shaft should be set to a speed of no more than 1500 rpm. This occurs due to the correct selection of the diameters of the driving and driven pulleys.

Useful advice! It is better to make pulleys for belt drives with 3-4 grooves. This will allow you to change the speed on the shaft by moving the belt, which is necessary for different operating conditions of the chopper.

The main advantages of homemade garden shredders

A homemade shredder does not require too much care. It can be used for more than just shredding grass, leaves and branches. It will ideally recycle any household waste. It can be used to grind the fruits of fruit trees for subsequent preparation of puree, jam or homemade wine.

In addition, a homemade garden chipper differs in its degree of productivity. All garden waste that falls on the grinding mechanism is instantly processed into small chips.

As can be seen from all of the above, you can create a reliable and faithful assistant for shredding garden waste with your own hands from scrap materials. It is enough to have some skills in locksmith work, to have parts of old equipment, the necessary tools and materials in your garage. Next, having chosen the most appropriate method for yourself, sketch out a drawing of a branch chopper with your own hands. Videos of various versions of a homemade shredder can be viewed on the Internet. Based on the drawing, prepare all the necessary elements and begin assembling the chopper.

If you are not confident in your own abilities, currently you can buy a homemade wood chipper from the proposed options, which will meet all the requirements and satisfy your wishes at an affordable price.

A garden shredder is a mechanism designed for processing plant waste generated during grass mowing, sanitary or annual pruning of trees, grapes and various shrubs. The resulting small pieces of grass or branches can be used as livestock feed or fertilizer. The use of this unit allows gardeners, owners of summer cottages and lovers of beautiful lawns to get rid of organic waste faster and with less labor. The structure of the device is relatively simple, for this reason it can be assembled with your own hands without any special financial costs from old parts and scrap materials. This allows you to save on purchasing a ready-made factory device.

To independently assemble a grass and branch chopper (shredder) at home, you must first understand the structure of the mechanism, as well as the principle of its operation. This will help you assemble the equipment correctly and, if necessary, make changes to its design.

A homemade unit, designed for grinding mown grass and cut branches up to several centimeters thick, has the following main structural units:

engine;
knives mounted on the working shaft;
frame (usually metal);
protective casing;
a box designed to receive cut vegetation;
starting system.

The technique itself can be done in a stationary or mobile form. To create the latter option, you will additionally need wheels, as well as a handle. To make the frame, use metal corners or ready-made frames from workbenches. Boxes for processed vegetation are made from plastic buckets, tin, bags. Protective cover around the knives should be thick and strong enough so as not to quickly wear out from the impact of grinding vegetation.

When processing plant debris, crushed pieces may fly out of the opening through which it is fed. Therefore, the neck is covered with a lid or simply with a cloth, for example, a bag.

The operation of the chopper is that rotation from the motor shaft is transmitted directly to the knives or through a chain/belt drive. The vegetation chopped by the blades enters the box. In this case, the final product is immediately ready for use.

By operating principle Some homemade shredders are comparable to a meat grinder (they suck in and then grind organic matter), while others are like a coffee grinder.

Varieties of engines for assembling homemade products

Used as a drive for homemade products electric and gasoline engines, taken from unused equipment. Each of these two options has its own advantages and disadvantages. Models with an internal combustion engine are more convenient in that their operation does not require a nearby power supply. But in general, they are more expensive and have a more complex design than their counterparts equipped with an electric motor. Therefore, it is easier to make electrical equipment, and also more compact.

The maximum thickness of cut branches that a branch chipper can grind depends on the power of the electric motor installed on it and the characteristics of the knives.

Models with a motor up to 1.5 kW are capable of grinding sticks up to 20 mm in diameter. They are designed for low intensity work.
If an electric motor of 3 to 4 kW is installed, then such units can chop branches up to 40 mm thick.
More powerful electric motors (over 4 kW) are used to make a shredder for wood with a diameter of 7-15 cm.

To create a homemade shredder, you can use electric motors from an angle grinder, washing machine, or trimmer. They must be adapted to operate from a stationary network with a voltage of 220 V. In order to grind material as thick as possible at home, it is recommended to equip the shredder with an electric motor of 1500 rpm with a power of about 3.5 kW. This parameter for internal combustion engines corresponds to 5-6 horsepower.

Motor from an old washing machine

Types of cutting attachments used

Homemade products, like factory units, are equipped with cutting attachments of various types:

disc (with three blades);

milling;

milling-turbine (universal).

The first type is flat blades. When they rotate, they grind plant debris. If you have to process branches, then such blades quickly become dull. Milling knives are a cutting shaft in the form of gears from circular saws. They grind dry waste from branches and grass well, and clog the cutters with wet waste. Milling-turbine cutting attachments can cope with thick and undried branches, but making them yourself is difficult.

At home, knives from lawn mowers or made from wood saws are often used.

It should be taken into account that the installed cutting attachments directly depend on degree of processing of plant waste. The output is pieces of branches from 10 cm long or shavings or dust.

Garden shredder from washing machine

An old Soviet-made washing machine with a metal body is a technique that contains almost all the necessary parts for assembling a garden shredder. You only need knives with fasteners, as well as an extension cord.

To make a cutting attachment, you can use old saw on wood.

Tools you will need:

angle grinder;
pliers;
wrenches;
screwdriver;
electric drill;
hammer;
tape measure with marker.

The washing machine motor has low power (about different models different) indicated in the instructions for household appliances or on the electric motor plate. Due to the fact that usually its value does not exceed 500 watts, using the unit being created it will be possible Grind only straw or grass.

A shredder from a washing machine is made like this.

The body of the machine is cut to height so that it is convenient to work with the unit.
At the bottom side, a rectangular hole is cut in it with a grinder, 20 cm wide and 7 cm high, intended for throwing out ground plants.
Around the slot, a kind of casing is made of tin, which will direct the herbal mass into the collection container, while preventing it from scattering to the sides.
They make legs.
Attach the body to the stand.
2 holes with a diameter of 7 mm are drilled on the electric motor shaft. Then a bushing with a thread and holes at the end more than 5 cm long is placed on it, securing it with bolts.
An electric motor is secured under the bottom of the box using studs and nuts.
Inside the casing, knives are secured to a sleeve, placing them above the grass ejection hole or at the same level with it.
The box is attached by welding or bolts to the stand.

The result will be a technique similar to the one shown in the photo below.

Start button suitable from a converted washing machine. You just need to make sure to connect the extension cord of sufficient length.

The design and operation of a grass cutter from a modern washing machine is shown in the video

Homemade grass grinder from a grinder

A grass grinder made from a grinder is a fairly simple and quickly implemented option. To implement the project, you will need to stock up on the following parts and materials:

steel corners;
metal container (regular boiling);
homemade or ready-made knives (for example, from a lawn mower);
fasteners;
sheet metal.

Tools you will need:

electric drill;
welding machine and electrodes for it;
an angle grinder to cut corners;
wrenches.

To assemble a shredder with your own hands on a corner base grinding machine, capable of grinding not only grass, but also branches up to 4 cm thick, it is recommended to use a power tool with a power of over 3 kW.

The creation of a grinding unit is carried out in the following sequence:

cut the corners into pieces with a grinder;
a frame resembling a chair is welded from them;
weld a shelf from a piece of sheet metal;
attach the grinder to the made frame (on the stand) with clamps, placing its shaft towards the top;
cut a hole about 10 by 10 cm in the side of the boil-out;
a sleeve, for example, made of tin, is attached to the slot, through which the ground plant mass will be dispensed from the container;
make a hole in the center at the bottom of the boil;
install the container on the angle grinder shaft and attach it with bolts or self-tapping screws to the metal frame;
Place the knife or disc on the angle grinder.

The result will be the design shown in the photo below.

The dimensions of the corners are selected individually to make it convenient to handle the mechanism.

It should be remembered that the frame must be stable. The safety of working with the device will depend on this.

Place a bucket or other container under the pipe for dispensing chopped grass with branches while working with the unit so that the processed plants do not fly away.

The created device can be improved. This will require attachment to the grinder shaft about 15 cm long with two knives: at the upper end and in the middle. The blades are separated by a mesh attached to the casing wall.

Grass cutter from trimmer

A garden shredder can be made using a gasoline or electric trimmer. In this case, the tool will work upside down. To create equipment designed to grind grass and thin branches, in addition to the brush cutter with cutting attachments, you will also need the following materials:

plastic or metal container with a volume of at least 50 liters;
approximately 1 sq.m. steel mesh with small mesh size;
about 3 meters of metal tube (aluminum or steel) half an inch in diameter;
a piece of board or moisture-resistant chipboard, plywood of such width that the trimmer fits on it;
clamps that will attach the brush cutter to the wooden base;
self-tapping screws, bolts, nuts, washers;
wooden blocks (5 by 5 cm is enough).

To assemble a chopping mechanism from a trimmer, you will need to use the following tools and devices:

a screwdriver or screwdriver with bits;
electric drill with a set of drills for wood and metal;
an electric jigsaw with files for cutting metal or a manual equivalent;
hammer;
open-end or socket wrenches;
punch;
an anvil or a flat iron plate.

Punch needed to make it convenient to drill holes with an electric drill. This tool point at the point where the metal needs to be drilled. Then it is hit with a hammer. The drill does not slip out of the resulting recess when drilling a metal part.

Hole punch set

Preparatory activities

A grass cutter from a brush cutter is manufactured in a number of stages. Initially prepared in capacity where the grass and branches will be ground:

make markings on the bottom (along the perimeter) for four trapezoidal holes with rounded corners;
drill holes with a cross section of 1 cm in each drawn segment;
a jigsaw file is inserted into them and trapezoids are cut out;
process the cuts with a file or sandpaper;
a hole is drilled in the center of the bottom for the chopper shaft;
a circle is cut out of steel mesh with dimensions according to the diameter of the bottom;
using small scraps of boards or blocks, the prepared mesh fragment is secured to the container from below;
Legs for the container are made from metal tubes, attaching them to the tank with bolts.

The wooden pieces are fixed with self-tapping screws, twisting them from the inside of the tank into metal jumpers between the cut trapezoids. In this way, the mesh is securely attached to the bottom of the container.

Legs done in the following way:

bend the tubes in a vice or using a pipe bender in the shape of the letter “P”;
the ends of future supports are flattened with a hammer;
2 holes are drilled into them on each side (6.5 or 8.5 mm cross-section);
fit the workpieces to the bottom of the container and mark the points of bolted connections;
drill according to the hole mark;
using bolts with washers and nuts, attach to the footrest casing.

After preparing the casing, so that reduce dimensions created mechanism, perform the following operations:

disassemble the trimmer, disconnecting the motor, rod and cutting attachment from each other;
cut off a fragment approximately 20-40 centimeters long from the rod with the cable;
collect the lawn mower;
check the performance of the equipment.

Chopper assembly

If the trimmer works well after assembly, then it is used to create a grass grinder.

The motor of the brush cutter is attached to the board with clamps.
Fixed on wooden base a barbell using clamps and a handle from a brush cutter.
Connect the cutting attachment to the end of the rod, previously inserted into the hole at the bottom of the casing.
They start the mechanism and test it in operation.

After these steps, you will get a unit, the photograph of which is presented below.

If the trimmer used to assemble the shredder is equipped with a gasoline engine, then the motor is placed on the base so that it is convenient to fill in fuel, start the device and regulate its operation (speed).

Cutting attachments are equipped with knives or fishing line - this depends on the thickness of the plant stems being chopped.

What else can a chopper be made from?

There are many different options for creating garden shredders with your own hands: from the simplest ones, which only allow you to grind grass, to more structurally complex, powerful units designed for wood up to 10 cm thick. Accordingly, the practical implementation of the plan will require different details, different amounts of time and money.

To assemble equipment for processing plant waste, in addition to the considered options for old or unnecessary tools or equipment, you can use the following devices:

drill or hammer drill;
an old working vacuum cleaner;
unnecessary electric saw;
motor from the pump;
gasoline or electric walk-behind tractor;
any electric motor of suitable power.

A drill with a hammer drill, if you use them to chop grass, you don’t need to redo it at all. It is enough to do only nozzle with blades. The created device will work like a blender, grinding soft plant stems into a container in small portions.

The nuances of operating homemade equipment

A self-made shredder is essentially three in one: a chopper for branches, a straw cutter, and a mechanism for cutting grass. It helps to significantly facilitate household work related to the disposal of plant waste, as well as feeding poultry and livestock.

If you have to process grass in small quantities, for example, for chickens, geese, ducks, then it is enough simple devices, which work from human muscular strength, for example, hand pruners.

For homemade electrical equipment, it is recommended to install separate differential machine to provide reliable protection against electric shock in case of unforeseen circumstances. In any case, when making a garden shredder yourself, you must follow safety regulations. It is also worth adhering to them during operation of the mechanism. Before working with equipment, it is recommended to wear goggles, suitable protective clothing and check that the structural elements are securely fastened. When creating a home-made unit, you should take into account the upcoming amount of work, as well as the nature of the vegetation being processed, in order to select an engine of the required power and the desired design of knives. This will allow the completed device to cope with its tasks without any problems.

A branch shredder is one of the necessary tools for a gardener. After all, everyone who cares for the territory has to regularly trim trees, which results in waste. It is problematic to burn such garbage in a stove without first crushing it with an ax, and building a huge fire in the garden is also impractical. The solution may be an electric garden branch shredder. After chopping, the branches turn into solid fuel or compost.

Currently, wood shredders are called differently: wood chipper, branch chopper, shredder, wood chipper, wood chipper, knot crusher, device for processing plastic, paper and sawdust, etc. The device consists of the following components:

As for homemade shredders, they differ only in the design of the cutting mechanism, and the remaining parts in them can have different sizes. If you are planning to make your own wood chipper, drawings and diagrams will be the first thing you need. They can be found on the Internet. Here are the most popular solutions:

To improve the performance of the shredder, a flywheel is often installed, which fits onto the free end of the shaft. In disk models, this part is replaced by a heavy metal circle with knives.

A wood chipper is a very convenient tool. However, not everyone can afford such a purchase, so most gardeners prefer homemade solutions. But is it possible to create a device without the appropriate plumbing and welding skills and tools? Unfortunately no. Even a simple branch chopper based on circular saws, it is created following strict instructions. In addition, to create shafts and bearing housings, you need to turn to professional craftsmen. The whole process can be divided into the following stages:

When creating, you should be guided by the following rules:

If the priority is to obtain small wood chips with minimal resources, give preference to models made from circular saws.
If you are going to chop small diameter branches into a larger fraction, a cutting mechanism such as a jointer is the ideal solution.
If you want to chop branches in large quantities, equip disk crushers.

By the way, small shavings and wood chips are often used to produce compost and mulch. In addition, fuel briquettes are created on its basis, which are then used to heat private houses.

If you have decided with choice of wood chipper, start procuring parts, materials and equipment. However, before that, there are a few key tasks you need to complete.

Engine selection and belt drive determination

An indicator such as drive power indicates the thickness of the branches that a homemade device can process:

However, the number of revolutions of the electric motor practically does not matter, since the required rotation speed of the cutting elements is provided by a V-belt drive.

To make a wood shredder coped with its duties with a bang, the knife shaft should operate at a speed of no more than 1500 rpm. Such indicators can be achieved by choosing the appropriate diameter of the drive and driven pulleys. The decisive factor is not the speed of rotation of the knives, but the resulting torque or force . There is also no point in paying special attention to the distance between the pulleys and the length of the belt, with the exception of too long belts, which significantly reduce the transmission efficiency.

As an example, we can choose the following calculation: we take an electric motor of 2800 rpm, which will be installed on the crusher. The ideal solution would be to reduce the shaft speed by half, to 1400 rpm. In this case, the pulley diameters will differ by a factor of two. For example, the size of the driving pulley is 100 millimeters, and the diameter of the driven pulley reaches 200 mm.

When ordering pulleys for a V-belt drive in a turning workshop, keep in mind: it is better to give preference to pulleys with 3 or 4 grooves, so that you can then change the speed on the working shaft by rearranging the belt. In this case, it will be possible to adjust chopper under different conditions work, for example, for processing corn stalks, sunflowers or grass.

Preparation of materials

To assemble the chopper frame, the following types of rolled metal are used:

The power plant is fixed to a steel sheet 10 millimeters thick (dimensions are determined by the distance between the mounting holes). The following options are used as a belt tensioning device:

The holes in the plate for mounting the motor are made oblong, which allows you to move it aside and fix it with bolts
The plate is installed at one end on a hinge, as a result of which the belt is tightened by the weight of the electric motor. On the other side it is fixed with nuts on studs.

To create a simple design shredder requires purchasing 20-25 circular saws with carbide tips and a similar number of spacer washers with a diameter of 20 millimeters. The result is a working part with a width of about 80 millimeters, which can be increased by adding saws.

The thickness of the teeth of the circular saw is greater than the steel base, so fixing the tools close to each other is prohibited. To compensate for the width of the teeth, it is customary to use washers that are placed between the saws.

The shaft, driven by a belt, is turned on a lathe from a steel rod. However, before manufacturing the part, 2 bearings should be made, to whose seat size the shaft will be machined.

In addition, bearing housings with mounting flanges should be equipped. They are often purchased ready-made on the secondary market or in specialized stores.

A good alternative could be rear axle bearings with a diameter of 25 mm - from classic Zhiguli cars. In this case, the role of the shaft will be played by the finished stud with nuts.

To fix the circular saws on the shaft, a thread is cut.

Features of frame manufacturing

Regardless of the type of crushing equipment chosen, it must be equipped with a key element - a frame, where the drive and chipping mechanism will soon be installed. The device is usually welded from corners or pipes, following the following step-by-step instructions.

Don't forget to consider where you will install the electric motor. For homemade crushers the best solution It may be an option to install the motor in the frame so that it does not protrude beyond its dimensions. A similar rule applies to other types of crushers.

Chopper assembly

To assemble a wood chipper from a package of circular saws, follow the instructions:

Immediately before assembly, lubricate the bearing cages. Install saws so that the tooth profiles do not match.

To fix the counter knife, it is better to use bolts rather than welding, threading them through oval-shaped holes.