Do-it-yourself band saw (band saw) for wood. Drawings and assembly of a band saw with your own hands Band saw band tension with your own hands

If you have any hobby, special tools are usually required. Hobbies are different, respectively, the amount of technology is also amazing. It can be very complex or as simple as a Soviet penny. The first, for example, is a band saw for wood or metal. They use it, of course, not only to satisfy their creative needs, but also for more serious work. For example, for renovation.

What is this tool?

A band saw is a cutting tool equipped with multiple cutters.

Actually, only the cutting surface is called this way, and the tool itself is called a machine. And it is precisely this that can be called a working technique. The band saw itself is a metal band, preferably steel, which is rolled into a ring. On one side, teeth are cut, which allow it to work as a cutting tool.

This tape must be installed on a pair of rotating pulleys of the machine - an electric motor with a mains connection is used to create movement. In this way, you can create both straight and curved cuts.

Why do it yourself?

It is preferable, of course, to purchase a tool in a special store that sells just such equipment. True, there are two "buts" here:

A price that might seem too high for the average person.
Functionality - the point here is that a band saw is far from always included in the list of mandatory tools for a workshop. Most of the operations can be done without her help, which means that there is no reason to purchase an overly expensive unit.

The second reason mainly follows from the first - if the price were not too high, then the majority would have acquired such a tool. This is logical, because it is very convenient to work on it.

Design

The project presented here is based on the development of Matthias Wandel, a Canadian inventor who assembled his saw mainly from wood. You might think that for such a tool it is better to use metal, but this is not entirely true.

The band saw-machine of such an assembly demonstrates good performance, quite comparable to the purchased models. In addition, the easily replaceable material allows for instant repairs. Concern about the replaced parts will recede into the background.

It is also important to remember that a lot will depend on the selected engine (it is better to use a ready-made one), band saws and blanks.

Saw frame

Is the main bearing element the whole structure. You need to use sturdy tree- under no circumstances chipboard, MDF, plywood or furniture board... A pine inch is perfect for this purpose.

Frame shape - C-shaped. Above, you need to make the basis for the guides of the tension mechanism with the upper wheel. On the opposite side, two supports are fixed, which in the future will be connected to the base. The structure itself is multi-layered - about six layers for strength. But that's not counting the additional overlays.

Phased gluing is fraught with distortion and inaccuracies. Therefore, you need to strictly control the perpendicularity of the elements. You can also make a frame without supporting legs, but be sure to leave the grooves of the desired size for them.

Upper wheel motor block

This is the second step to getting your hands on a wood and metal band saw. The block is a movable structural element that provides belt tension.

Installation takes place on an already prepared frame - the horns of the letter "C", which remained empty. You need to secure the profile (preferably hardwood). It is a wooden rectangular frame, inside which a movable holder for the upper wheel shaft is installed.

The corner joints of the frame can be reinforced with inserts. In such work, reliability comes first.

The block itself must move freely. In the upper part, make a hole for a long bolt - this way the band saw for metal will be able to adjust the tension.

The tilt adjustment must be installed in the shaft holder - usually a screw is used for this purpose. The holder itself is fixed in place with two self-tapping screws. To achieve the mobility needed in the future, you need to leave enough backlash.

A metal lining is installed under the screw, and the shaft itself, after adjustment, will be fixed with another self-tapping screw.

Saw wheels

It is quite appropriate here to use those materials that were rejected earlier. For example, MDF or chipboard. The design on the basis of which the band saw is assembled provides for the size of wheels with a diameter of forty centimeters. The thickness can be different, but of the order of two to three centimeters.

The construction here is also glued, from several layers.

The crucial moment, as you might guess, is the central part.

You can make wheels on a milling machine. For convenience, immediately drill a hole in the center to align the circles, and also try to leave about a centimeter for finishing after assembly.

You need shafts for ready-made bearings, with a limiter and internal thread on opposite sides. Flanges can be made from the same plywood. They consist of two parts - the first holds the bearing, and the second provides a gap between it and the wheel itself.

Diameter drilled hole does not have to strictly correspond to the threaded shaft - it is better that the former is slightly larger than the latter.

You will need two wheels, since the band saw for metal or wood provides for this design. They are the same size and are made at the same time.

Also, to prevent the saw band from slipping, you can give the initially round wheels a slightly barrel-shaped shape - this will help to avoid many problems. The bevel angle on each side must be made at five degrees.

On one of the wheels, install a standard drive pulley, fitted to the used belt.

The last part of the work is balancing. For this, small bearings are used to support the belt. The temporary axle is fixed horizontally, the bearings mentioned earlier are installed and a slight rotation is started.

To improve performance, several indentations can be made in the lower part of the rear of the wheel - this helps to avoid rotation in any position.

Wheel fixing

The top is installed first. Washers are put on the shaft. The wheel itself must be secured with a bolt plus a thick washer. All this is screwed into the end of the shaft. Adjust it parallel to the frame using the adjusting screws.

The lower wheel block is secured with clamps, after which it is hung on the frame. Next, place the wheels so that they represent one plane, simultaneously parallel upright rack... Then do not forget to fix the lower shaft.

Adjusting the Saw Blade Guides

Some skill is required here - press one end of the tape (which is smooth) against the outer ring of the bearing.

From the sides, it must be held. You can use fluoroplastic "crackers", but better fit wood - the latter wears out more slowly.

The protective cover is simply a cut pipe, securely fastened with self-tapping screws or screws.

The tire must be set with the utmost precision - for the band saw, any misalignment will become noticeable. The tire is fastened to the frame using a groove. You can mark everything on a wide canvas.

If you are wrong with the groove, then just expand it and make a corner of metal and a spacer from pieces of paper glued to it. Thus, the tape should fit straight. The corner, of course, must be carefully secured.

The latch is equipped with two holes. The first is used in order to press the tire as securely as possible, and the second is used only when working with very thick workpieces. It allows the first part to be lifted.

Instead of a conclusion

Sharpening of band saws is a very important procedure.

Moreover, the teeth must be smooth, otherwise the device will quickly become dull. You can use the usual grinding wheel... Depending on the material of the saw - corundum, CBN or diamond. You also need to finish the work with a fine-grained donkey.

The main thing in such a process is to approach business with intelligence and patience. A DIY band saw is a laborious and long-term project. Errors are unacceptable here. But if you do everything according to the instructions and check with the advice of specialists, then soon a new tool will appear in your workshop.

So, we figured out how to make a band saw with your own hands.

Band saws are a powerful industrial tool for cutting wood and metal. The cutting blade is a continuous belt moving in one direction along the drive pulleys and one side interacting with the material being cut. With the relative simplicity of the design, a band saw with your own hands is quite real. How to make it and how to set it up correctly will be described in this article.

From the history

The band saw has been known for a long time, from the beginning of the 19th century (the first patent is 1808). The very principle of continuous movement of the saw blade (as opposed to the reciprocating one for a hacksaw) has long been of interest to engineers. It is more technologically advanced for many reasons:

The hole saw is cooled naturally - only a small part of it is in contact;
The movement of the teeth in one direction less damages the cutting area;
The tape is easier to sharpen;
The drive and tensioning mechanism is simplified as much as possible, as is the lubrication mechanism.

But on the way of implementation, there were some difficulties associated with the connection of the saw band into a ring. The tape must be strong, resilient and, at the same time, flexible and sufficiently elastic. Weld such metals so that no seams remain that interfere with its movement in the body of the material and cause overheating (as a result, a rupture at the junction).

This is what the first band saws looked like.

On wood banding machines, these difficulties were minimized, but on metalworking machines everything was different. Only by the end of the century in France was it possible to establish the production of acceptable saw blades that were welded contact welding and then the seams were carefully sanded.

At the moment, several varieties of circular saw blades are produced:

toothed;
friction saws;
electrospark.

A homemade metal band saw, as a rule, focuses on a toothed blade of a bimetallic structure. This is a tape made of durable steel (spring steel or similar in properties) with teeth of extra strong tool steel with hardness M42-M71. The sharpening of the teeth is different for different materials.

Largest band saw blade

For example, for cutting pipes and channel bars, you will need a tape with reinforced tooth backs, for stainless steel - with a sharp sharpening of 150 and an increased distance between them. When cutting, stainless steel forms viscous chips that interfere with the movement of the saw, getting stuck between the working edges. If you have to cut large-sized metal, then you need a blade with periodic wiring - narrow and wide alternate, to eliminate the threat of the tape getting stuck in the cut.

In order for the do-it-yourself band saw to work properly, calculate it for a factory-made band. It is quite difficult to make it with your own hands, even if you manage to find a suitable metal and your workshop has all the necessary welding and sharpening equipment.

Band saw device

The band sawing machine is highly versatile. It can be used to saw wood and metal:

vertically;
horizontally;
at an angle.

There are machines with the feed of the working console, when the material is fixed motionless, and the blade moves on it, but there are built on a different principle - the saw unit is stationary, and a log, board or a metal sheet... The second option is more affordable for self-production.

The main units of the band saw:

The bed (frame) is made heavy and durable. It must ensure the stability of the machine during operation and the absence of vibrations;
Work table with emphasis and ruler;
Drive pulleys;
Engine (from 2 kW);
Remote Control;
Lubrication system;
Protective cover.

It should be remembered that the cutting speed of different metals is slightly different. The range is very wide - from 30 to 100 m / min. Average indicators of cutting speed for homogeneous solid metals are given in the table, but for each specific model of saw and saw blade they can differ within 10-15%.

DIY band saw

You can find a lot of materials, photos and videos on how to make a band saw with your own hands on the Internet. For example, Matthias Wandel's Canadian site offers drawings of a machine made almost entirely of wood. But let's dwell on something less exotic that can be done both in a home workshop and in a small workshop for processing wood or metal.

Tape machine made of wood

Manufacturing the bed

The initial stage is the manufacture of the bed. For a saw for wood, it can be wooden or metal, for metal - only steel. You can weld it from a channel or corner. For a small workshop or workshop, this is not a problem. The dimensions of the bed are selected depending on the expected dimensions of the material to be processed. Normally sawing homemade machine can handle wood up to 350 mm thick and metal a few centimeters thick.

Carrying bar - channel # 8, which is welded to the frame or bolted. It must be strictly vertical and fixed at at least two points along its length in order to exclude the threat of deflection. When biting a saw, for example (which sometimes happens) or when cutting large material, the loads are quite large.

In the work site, we make a cut under the saw

On the bed there is a horizontal working table with cuts for the movement of the tape, a ruler, an emphasis, clamps and other devices for feeding and holding the workpieces. The height of the table from the lower stops is 0.7-0.9 meters. The height of the bar above the table is 0.6-0.8 m.

At the bottom of the bed is installed asynchronous motor with starting capacitors, connected by a belt drive with a variable diameter drive pulley. If it is necessary to change the cutting speed, the V-belt is simply transferred to a different diameter. The belt tension is provided by a spring tensioner.

Band saw drawing

Installing the drive

To drive the belt, wooden or metal pulleys of the same diameter (240-260 mm) are used, which are fixed on shafts mounted on bearings. The lower pulley is connected by a shaft to the motor drive. The shafts of the saw pulleys are fixed to the bar. The lower one is motionless, the upper one is in the slot of the fixed tensioning mechanism. This allows the use of belts of different lengths.

The machine is protected from the beating of the belt by a special damper mechanism, which is located under the work table. Drawings of this device can be found on the Internet. Sometimes you can see band saws with two dampers - below and above. working area... This is justified if the machine is designed to work with large workpieces or an extremely high cutting accuracy is required.

Lubrication system and protection

Lubrication system (adjustable), installed above the work table. Oil flows by gravity onto the saw blade in the required amount, which is determined experimentally for each home-made machine.

All work parts, where something is rotating or moving, must be protected by covers. It is best to make them from waterproof plywood with a thickness of 10 mm or more. It is inexpensive, and the sanded plywood, painted with enamel, looks very good.

Start system - standard push-button with emergency shutdown. It is advisable to make the lower part of the machine in the form of a bedside table with a wide door, or even two. One serves to collect the falling sawdust, the second to access the pulleys and adjust the belt speed.

Cover rotating elements with covers

Making a band machine for an experienced locksmith with your own hands will not be difficult. Some of the necessary parts and assemblies can be taken from decommissioned or dismantled machines of your own enterprise or bought on the market or on the Internet, some can be made by yourself. In any case, a self-made machine will cost two times cheaper than a factory one, with the same level of performance and accuracy of adjustments.

wikimetall.ru

Do-it-yourself band saw - a drawing is not as terrible as its embodiment

With a large volume of lumber use, sooner or later the question of your own sawmill arises. Such installations are commercially available, but their cost is prohibitively high.

Therefore, many home craftsmen make their own sawing machine. The following options are used:

Homemade band saw - how to make a sawmill

the main problem a similar attitude- its dimensions. Owners of apartments with balconies need not worry. This device is not for you. Except that desktop version- a substitute for a hand jigsaw.

If we are talking about dissolving round timber into logs, you need a spacious shed, a shed or a separate workshop. Of course, all this is located in the courtyard of a private house.

IMPORTANT! Taking into account the potential danger of the structure, and the size of the workpieces, the room is selected taking into account the free space around the sawmill.

Drawings are best made using specialized programs, for example - AutoCAD. General form structures in a three-dimensional image are shown in the illustration:

V this material describes a vertical band saw.

Frame making

The most critical part of the machine is the frame, or bed. It bears all the weight of the structure and is the support for the desktop. You can make it from a steel profile or a corner, but from the point of view of material cost, wood is preferable.

The sawmill can be made of wood or metal, depending on the selected blade. At the same time, a properly manufactured bed will ensure reliable operation with any material.

It is undesirable to build a frame from plywood or chipboard. The best material would be a 20 mm board, from which any bed configuration can be assembled. The structure is glued according to the principle - each next layer crosses the previous one with the direction of the fibers.

It is possible to strengthen the structure by using self-tapping screws to fasten the layers, however, glue remains the main binding material. The "C" -shaped structure is rigid and at the same time relatively elastic. That is, the frame, in addition to the supporting component, plays the role of a kind of damper, which makes it possible to smooth out the jerks of the band saw blade.

Upper pulley block

The next critical part of the installation is the adjustable upper wheel (pulley) block. The shaft must move vertically to maintain tension on the blade when it inevitably stretches during operation. The frame is made of solid wood (beech or oak).

Inside the frame there is a wooden insert made of the same wood, in which the shaft for the wheel is directly attached. The shaft is milled in accordance with inner diameter wheel bearing. The insert with the shaft must have one degree of freedom to adjust the tilt of the axis.

This will be required when adjusting the belt tension. The inclination is regulated by a threaded stud and a set of nuts integrated into the tree.

Vertical movement is carried out using a hex head screw mechanism. You can tighten the block with a socket wrench, or install stationary handle to adjust. The block frame itself moves along the guides installed in the upper part of the bed.

For this, grooves are pre-milled in them, corresponding to the frame racks.

IMPORTANT! All nuts in the adjusting mechanism are reinforced with metal plates. If necessary, the nuts can be welded.

The shaft is machined with a flange, by means of which it is fixed from the rear side to a wooden insert. An example of such a flange in the illustration:

Manufacturing of wheels (pulleys)

The material for gluing the wheels is plywood circles. Cut with a milling compass. Depending on the thickness of the material, there can be 2 or 3 layers. The total thickness of the wheels is about 30 mm. After gluing it is necessary to cut a hole for the bearing.

For the stability of the structure, it is better to fix the bearing in a coupling machined from fluoroplastic or PCB. You can get by with an aluminum one if you find a circle of a suitable diameter. From the side of the block, a fluoroplastic washer is put on the shaft.

It is undesirable to use metal due to accelerated wear. Outer side The bearing is fixed with a flange, in the illustration it is square.

The running surface of the wheels is turned into a barrel shape. In this case, the band saw will self-center. A bicycle tube is put on and glued onto the finished surface. After final assembly, the wheels are balanced. This can be done by changing the diameter of the holes that are drilled in the disc.

IMPORTANT! When installing the bearing, ensure that the shaft is perpendicular. In the event of a deviation (even a slight one), the wheel will have a runout along the plane, and the belt may jump off.

A drive pulley is attached to the lower wheel. The shaft is rigidly installed, without the possibility of adjustment. It is better to adjust the tension of the drive belt by the position of the motor; for this, its foundation is equipped with longitudinal grooves at the points of attachment to the base of the machine.

The normal speed of rotation of the wheels for a band saw is 700-900 rpm. When calculating the diameters of the drive pulleys, it is necessary to take into account the operating speed of the electric motor.

Saw table

The table top, together with the base, is also made of wood. The base is made in the form of a pedestal, inside which an engine with starting device, and boxes for tools and spare parts.

The table is made of thick plywood, with working side the textolite is glued. A good option might be a countertop from kitchen furniture with durable laminate on the surface. For the convenience of work, the tabletop can be rotated.

In this case, it will be possible to cut at the desired angle. There is no point in describing the mechanism for tilting the tabletop, since each master decides for himself what degrees of freedom he needs.

A parallel stop must be made together with the table. The design is very diverse: from a profile with two clamps to a roller guide system.

Saw band setting

To begin with, the wheels are set strictly parallel to each other. The vertical displacement of the pulleys is removed using fluoroplastic washers on the shafts. The initial start-up is carried out without guides, and a test cut is made without load. Correctly tuned wheels rotate smoothly, the belt does not tend to jump off the pulleys.

After adjustment, the blade guide block is installed. Without it, it is impossible to cut under load. Design feature - the module consists of two parts, but both halves must be aligned strictly along the line of the saw blade.

Band saw blades

There are craftsmen who independently make band saw blades. You can purchase a blank in the form of a steel strip, and sharpen the band saw according to the template. Joining the canvas into a closed tape is the most difficult stage of manufacturing. Welding of band saws is carried out by the butt contact method. There should be no overlap.

After joining, the joint is sanded. However, the modern assortment of canvases allows you to buy a kit for any material at an affordable price.

So don't waste your time making supplies - this is not the case when it makes sense to apply your craft.

Before buying, use the reference material on the selection of blade widths depending on the radius of curvature. Perhaps you will be sawing curly wood products on your sawmill.

The video shows step by step how to do homemade saw on wood from plywood and a hub from a Zhiguli. After assembly, a wood blade 6TPI 3380 × 0.65x10 mm is used to work on the saw. from the machine JWBS-18 Jet PW10.3380.6. In general, the saw band must be matched to the tooth profile, depending on the type of wood. For example: hard wood is sawn with a tape with a width of 80 mm or more.

obinstrumente.ru

Do-it-yourself band saw: drawings, welding, sharpening, manufacturing, woodwork, photo and video

Any owner of a private house wants to have a variety of appliances. This makes the necessary work much easier for him. If you need to deal with wood products, work will become easier when you have the right apparatus. A do-it-yourself band saw is actually simple, the main thing is to use the drawings, as well as the advice of various professionals.

Device and application

Used both at home and in industry for sawing wood. It has its pros and cons, but it is not used almost everywhere. A homemade band saw consists of a pulley and electric motor attached to the frame, and a blade is attached to the first for cutting the material. The device will not work without an engine. The fabric can be different, due to which both wood and metals and even polypropylene are cut.

Homemade band saw

Advantages and disadvantages

I must say that a band saw with your own hands is easy and quick to craft, but it is recommended to find out in advance about all its advantages and disadvantages.

Works with great speed.
Very accurate.
Very productive.
Low thermal conductivity.
You can set individual parameters for the blanks.
Bends can be either straight or curved.
You don't need a lot of money to assemble the device.
After the work of the tape, a cut remains, the width of which is small. Therefore, there will be little waste. This is very great advantage when wood products are made.

Cuts can only be longitudinal. This is due to the design of the unit.
When it works, it vibrates and makes noise.
The machine is quite large.
It is necessary to use special equipment for the production of the saw.

The choice of blade and machine

When you yourself make the production of band saws, it is useful to know that materials can be found at home. But you can't do without canvas, so you should go to the store for it. But before that, you need to make a decision: what material will be cut:

Diamond - cuts ornamental stones such as granite and quartz, as well as marble.
The bimetal blade can cut stainless steel and alloys.
Tooling - appropriate steel is used. Needed for simple materials. They are used by small workshops.
Carbide. They are used for difficult alloys.

The machines also differ. They are divided into 3 types:

Toothless. Very productive, often used for metal. There are teeth, but small. The principle of operation is based on friction as well as heating additional type.
Serrated. This is how plastic and wood are cut. Closed canvas.
Electrodisc. Suitable for enterprises with a large volume of processed products.

Tooth selection table

Materials and various tools

There are many tools at hand to make an apparatus. If a person conceives of making a band saw with his own hands, then he must stock up on the following items:

Bushings.
Engine electric type.
Polyurethane glue - connect the parts.
Fasteners such as bolts and screws.
Steel rod, as well as channel. Required for making axle and frame.
Rubber - sheet type. She protects wood.
Belt - for wheels.
Sheet steel. A cutting blade is made from it.
Wooden board (plywood or chipboard can be used). Needed for a frame with a curbstone, and also a pulley.

Instruments:

Welding machine.
Bulgarian.
Hammer.
Screwdrivers.
Machine tools - cutting, grinding, welding.

Manufacturing instruction

The manufacture of the device does not take place in one stage, but in several. If a person makes such an assembly as a band saw with his own hands, drawings are the main thing, you cannot do without them:

Saw band drawing

First, they build a table, and then a curbstone. A wooden shield is used for this. After all, this is a device for fastening the mechanism itself.
They take plywood, make pulleys, and glue them with sheet rubber.
All elements made of wood are sanded, and epoxy is used for the top coating.
Next, to assemble the device, a frame is made. It resembles the letter "C". Therefore, the tape holds well. To make it, they take a channel. And a steel axle is put on it.
Then you need to take the bushings and put the pulleys on the axle, after which the latter are balanced.
The tape can vibrate to prevent this from happening, use a damper.
Now all the parts that will move are connected to the engine.
In order for the material to be fed on its own, a special mechanism is made using metal corners.

How to sharpen a saw

It's not news to anyone that any equipment needs to be inspected from time to time, and also, if necessary, repaired. The main thing for a saw is to sharpen it correctly. So, sharpening band saws with your own hands is not as scary and difficult as it seems. It is enough to do the following:

First, they do the initial sharpening. That is, they consider symmetry, establish it, examine the teeth, if there are cracks, they must be eliminated.
Further, there will still be on the canvas, as well as sawdust. It is necessary to clean it from this debris.
To restore the corners, run the routing.
Final sharpening is done. It is designed to eliminate all existing distortions, and also make the teeth sharper.

Sharpening rules

If used to be a man did not do that kind of work, he must be very careful. Otherwise, the operation of this device will be of poor quality. In the case when a person is not sure that he will be able to carry out such activities himself, it is best for him to call specialists who understand sharpening.

Emerging problems

If a person first thinks about how to make a band saw, then he should know that he may have complications:

First, the equipment used for manufacturing is not very simple. After all, you need to be able to use the welding machine correctly.
In addition, not everyone has a milling machine.
Secondly, you need to monitor the stability of the structure. We must not forget about the mass of the processed material.
Thirdly, not every person will understand the drawings.
It must be borne in mind that the cut of the apparatus will be wide.

As a result, if you really want to make such a car yourself, then you need not only material with tools, but also patience.

Using the machine for wood

Let's say you made a car, but now you need to use it in the right way. The thing is that when a homemade wood band saw is used, then all safety rules must certainly be taken into account. Sometimes the web bursts, so you need to check the fastening, and also not be too close to the machine.

If the workpiece is large, then only large teeth are used. It is best to use a universal tape. Then there will be no need to change the canvas.

Before making the device, you need to think about where it will stand. Consider not only the room, but also whether there is electricity in it, as well as ventilation.

Before working, you need to pull the tape as tight as possible. If this is not done, the machine will not work well, and it can also be dangerous.

Do not work on the device for more than 2 hours. Then the tape must be removed and not touched for a day. After the machine has been in operation for a very long time, it must be lubricated. It is required to ensure that the teeth are set correctly.

These are, in fact, all the features. Do not forget that the device should be properly looked after. If the owner sees that there is something wrong with the device, it is best to turn it off, look, check. You have to be very careful.

Band saw for wood: drawings, photos and videos

There are many various tools for sawing workpieces - this is hand saws, circular, cutting, jigsaws, etc. But a special place among them is the band saw. This article will focus on making a homemade band saw.

Introduction

The workshop should have everything at hand and the abundance of tools makes the master truly free in the choice of methods and techniques of work. One of the most basic operations in any workshop is sawing workpieces. Moreover, sawing can be different - somewhere you need to saw off quickly and the quality of the cut is not important, somewhere you need a deaf saw and a circular or jigsaw with a special file will cope with this, somewhere you need an extremely even saw, and so on.

A hand-made wood band saw deserves a place of honor in the workshop. Not everyone has it, nevertheless, the convenience of its use is undeniable. Its advantages include the following features:

High quality sawing, since there is no return movement of the cutting blade.
High cutting speed as the cutting band moves at high speed.
High maneuverability when sawing due to small blade thicknesses.
High versatility and flexibility in the use of the tool.
High work safety.

However, the band saw also has disadvantages. Let's list them:

This is a stationary saw, therefore there is no possibility of its mobile movement.
Limited cutting area due to design features.
Large dimensions.

Making a band saw

Preparation for work

Getting started, you need to prepare all the tools and materials, as well as a place where it will be comfortable and safe to make a homemade band saw.

Instruments:

Basic tool	DescriptionOperation	Alternative tool
A circular saw	Longitudinal cutting of workpieces	Band saw with the ability to cut parts over half a meter long. Jigsaw. Lack of a jigsaw in poor saw quality.
Jigsaw	Cutting out a niche, groove and upper latch. Manufacturing of pulleys.	Band-saw. Manual jigsaw. High labor intensity of the process.
Clamps	Fixation of workpieces during gluing, as well as during other operations	There are no worthy alternatives, but you can adapt and try to use a carpenter's vice or some heavy object as a press.
Drilling machine (+ drills)	Drilling holes	Hand electric drill. Worse drilling machine that does not guarantee the correct geometry of the holes. Drilling with a drill is more laborious.
Grinding machine	Surface grinding of workpieces and edges	Hand electric drill with grinding attachments. Difficulties may arise when sanding at 90 degrees. Screwdriver. The problems are the same as with a hand-held electric drill. And also the limited power of the tool is added.

Materials, accessories, fasteners

Plywood 15 mm thick;
Solid wood block;
Bolts for horizontal and vertical adjustment;
PVA joiner's glue;
Adjustment bolt lug;
Insulating tape;
Top axle bearings;
Two bearings for the drive axle;
Two shafts;
Cutting blade;
Two female threaded bushings;
Self-tapping screws, nuts, washers, footwear, studs;
Tapes or nozzles for grinder or a screwdriver.

Basic structural elements

The band saw drawing will include the following components:

Base;
Belt tensioning mechanism;
Saw table;
Pulleys;
Saw blade (cutting band).

Manufacturing of structural elements

The manufacturing instructions will be broken down into 5 steps and include steps for making a homemade band saw. The article provides photo and video materials that will help you not to make mistakes in production.

Base

Since the band saw must be strong, it is necessary to prepare plywood with a thickness of at least 15 mm. We cut off four pieces 550 mm long and 23 mm wide.

Next, we make the markup using a pre-created stencil, or you can make the markup directly on the workpiece. The two plates located inside must have a niche for the tunable mechanism. For external parts, a through groove must be drawn. The amount of vertical adjustment will depend on the dimensions of this slot. Next, you need to mark the through hole for the drive lower shaft. In addition, we need a surface for a saw table, the dimensions of which in the width of the table will not exceed 150 mm. In all blanks, it is necessary to cut a square between the circles in height equal to 15-20 cm, and not exceeding 15 cm in width.

Using a jigsaw, you need to cut necessary details, as well as the upper pulley adjustment groove, then drill a hole for the lower drive shaft.

Next, you need to collect the future foundation. For assembly, PVA glue or any other joiner's glue is used. We apply it in an even layer on all the surfaces to be glued, then we apply the parts to each other, avoiding inaccuracies. Fixation of products must be performed with clamps, since for high-quality gluing, a tight fit of the blanks is necessary. It is necessary to withstand a day until the glue is completely dry.

We install bearings for the lower drive shaft.

Saw blade (band) tensioning mechanism

To manufacture the band saw tension mechanism, you need to make a bar, the dimensions of which will correspond to the niche in the saw body. A hole is drilled at the end of the bar for the stud and the foot. Bearing housings are cut on both sides.

We insert the hairpin and fix it in the bar. It must hold firmly in the hole. To increase the strength of the fastening, before inserting the hairpin, apply PVA glue to its surface, and you also need to fix the hairpin with a self-tapping screw or screw.

Next, the shaft bearings and the retaining sleeve are installed.

With the help of a screw in the case, the saw blade tensioning mechanism will be rigidly fixed.

It is necessary to install a handle on the pin, the rotation of which will allow you to change the depth of immersion of the bar into the base, thereby changing the distance between the pulleys - this is how the belt is tensioned.

Pulleys

While the glue of the base dries, we proceed to the manufacture of moving elements, namely, pulleys. The whole process of their manufacture is reflected in the given photos.

On a sheet of plywood 15 mm thick, you need to mark the contours - a circle with a diameter of 150 mm.
Cut the blanks with a jigsaw along the outlined contours and drill a hole in the center of the circle.

Even the most precise and accurate sawing will not give the workpiece perfect correct forms, therefore, it is necessary to grind the ends. For this will be used grinding machine with a table at 90 degrees in relation to the processed plane. If you do not have the right tool, you can grind the edge with a hand-held sander or homemade device for a screwdriver with a grinding attachment. The workpiece is fixed with a bolt or self-tapping screw to a base. Thus, when it is fed to the grinding wheel and rotated around the axis, a perfectly flat wheel is obtained.

After processing the pulley on a grinder, you need to wrap its ends with insulating tape in several layers, and you can also use rubber from bicycle tubes.

Saw table

The saw table will be 15 cm wide. It will be mounted on a special end face of the machine base between the pulleys. In the table, you need to make a cut for the free movement of the saw blade. The dimensions of the table to be made depend on the needs and preferences of the master. You can make a small table that only slightly protrudes beyond the machine and saves space, or you can make the upper surface area larger for ease of use. As always, in life you need to choose the "golden mean", therefore final decision behind the master.

Saw blade (cutting band)

It is best not to make the cutting blade yourself, but to buy a ready-made one. In stores you can find the most various options, which differ in the type of size, the type of steel used, the hardening of the material, the shape of the teeth, their setting, etc.

Below is a table with some parameters of the saw blades.

International marking	Decoding	Body hardness	Teeth hardness	Application feature
Constant hardness	with the same hardness over the entire area	45 - 48 units HRc	45-48 units HRc	This view used on small diameter pulleys.
Flex back - Hard Edge	with high levels of hardness of teeth, but a flexible body	30-33 units HRc	63-65 units HRc	Top part the tooth is hardened, while the rest of the product is flexible. Able to carry a larger feed compared to the previous type.
Hard back	hardened over the entire area of the canvas	48-53 dmg. HRc	63-68 dmg. HRc	The saw band production technology is the most modern and is used in industry. Able to perform a larger amount of work, but the price is much higher. The canvas is used in professional machines.

In addition, band saws vary in tooth size:

with small teeth
with a middle tooth
with a large tooth

The more hard the tape has, the more resistance to bluntness it has. The rigid blade allows you to cut material at high feed rates without compromising performance.

In this case, for our band saw, the choice was a 1065 mm long blade made of carbon steel, marked Constant Hardness.

Assembly

Base processing. After the glue has completely dried, you need to remove the clamps and process the gluing site, ends and other surfaces.
Installing the saw blade tensioning mechanism. It is installed in the landing groove, and a stop element must be placed on top. During operation, the mechanism must be rigidly fixed.

Installation of pulleys. It is necessary to pay attention to the fact that the pulleys to be installed should be parallel to each other and rotate easily around their axis, while the axis should be absolutely static. Avoid strong beating of the circles, as this can lead to the saw blade slipping off the pulley and injury to the master. The lower drive shaft must go through the housing and have a sufficient end on the back to be clamped in the drill chuck. The upper pulley fits into the saw blade tensioner.

Installation of the cutting blade. The saw blade should be installed over the ends of the pulleys. First, it should be loosely put on this structure, and by rotating the adjustment knob, the bar with the axis of the upper pulley moves upward, thus increasing the distance between the centers of the pulleys. In this case, the belt is tensioned. After tightening, you need to tighten the screw a of the case to firmly fix the tensioning mechanism.

Saw table installation. The saw table is positioned on the horizontal surface of the base, as shown in the photo. Its area must be sufficient for comfortable process sawing the workpiece. It should be noted that the perpendicularity of the table is very important. saw blade, and in two dimensions - longitudinal and transverse. The table is fastened with self-tapping screws. Although there is an option to "put" it on glue, and to install dowels for strength.
Power tool installation. At the very last stage, you need to make this structure come to life. To do this, clamp the shank of the drive shaft of the lower pulley into the drill chuck. Alternatively, you can use a hammer drill or screwdriver. But the power of the screwdriver will be clearly insufficient, therefore, after all, a drill or perforator.

Adjustment and commissioning. Before starting work, run the band saw at idle speed. Make sure that the tape does not slip and runs smoothly. Check its tension and that the saw blade tensioner is secure.

Band saw rules

A large volume of processed materials requires the installation of a blade with large teeth on the machine. The best option- use of universal band saws.

at large size the workpiece to be processed should be installed on a band saw with large teeth; it is better to use cutting belts of the universal type. This will eliminate the need to change the blade when processing various materials;
Determine the location of the machine and securely fix it on a static surface, avoiding vibrations during operation. The room in which the band saw will be installed must be well ventilated.
After finishing work, remove the saw band and, accordingly, tighten it only before work. This will extend the useful life of the canvas.
Every two hours of operation, turn off the band saw and allow the motor, in this example the drill, to rest while checking for faults. Compliance with this rule will protect the employee from injury, and the tool from overheating.
Check the setting of the cutting teeth from time to time.

Conclusion

At correct assembly and use, the band saw has a long service life. You should only sharpen the tape from time to time and monitor the condition of the main parts.

Video

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The band saw belongs to a dangerous group of equipment that is used in the industrial and construction sectors. Small units are often used in everyday life for processing wooden materials, and they can be bought or made by hand. It is important to know the nuances of assembling the equipment, to familiarize yourself with the dimensions of the canvases and the parameters of the teeth for safe and high-quality work in the future.

Band saw parameters

Such equipment brings a lot of positive points if wood processing is required. At home, it is necessary when running a small furniture manufacturing business.

Some types of saws allow you to additionally work with the following materials:

metal;
synthetics;
stone.

The high density of these materials requires the use of hardware that includes reinforced steel parts and consumables. If you use standard steel, then when processing metal or stone, the disc and teeth are deformed in a short period, so preparation for work is required in advance.

Consider not only the type of material to be processed, but also the production scale. The endurance and power of the purchased equipment depends on this. For one-time use, you can buy a cheap band saw or make it from improvised tools and tools, but intensive work requires a serious and expensive unit.

The size and pitch of the teeth of the blade

When choosing a saw, you need to pay attention to the size of the machine itself. The requirements are described in the instructions for purchasing the unit, but there are some nuances that are not indicated there.

Consider the following additional recommendations when choosing a saw:

The quality of processing is influenced not only by the size, but also by the pitch of the teeth located on the cutting blade. It depends on it how quickly the work will take place, the presence or absence of damage.

When choosing, consider the following features of work:

Tooth arrangement and sharpening

The quality of material processing, vibration, the absence of deformation of the processed material and a direct effect on the service life of the machine depend on the setting of the teeth. Taking into account the principles of work, it is important to choose the right profile. There are several types of cutter profile:

Wavy tooth profile used for cutting thin material or small workpieces.
The standard tooth arrangement is used for high volume jobs, contour cutting or vertical machine mounting. The teeth are located on either side of the center blade segment, but there are options with an additional location of the teeth in the center.
The most expensive type of profile is the pairwise (variable) setting of the teeth. This type of saw is the most durable of the presented range, effectively copes with cutting even rough and dense types of wood, reduces the load on the frame of the cutting element, which significantly increases its service life.

When choosing a blade, it is important to make sure that the teeth are well sharpened, the steel is uniform in different sites saws and edge flatness. If you focus your attention precisely on these indicators, then you will be able to buy consumables that have not been used before.

The seller should check the saw's capabilities. For example, some instances are created with re-sharpening in mind, and it is important to ask how many times it is allowed to re-update the teeth. Sharpening segments on a saw that is not intended for this is prohibited. This is an extra load that will blunt the teeth or break them.

Making a saw with your own hands

Considering all the nuances, size and pitch of the teeth on the cutting element, you can proceed to self-assembly band saw at home. This can save a significant amount of money, but you still need to purchase some parts and materials to assemble a desktop or a device that sets the mechanism in motion.

Do-it-yourself wood band saw assembly according to the drawings includes the following elements:

Some parts are easy to replace with scrap materials that almost everyone has in the garage. Other elements of the machine require the purchase of production models. For example, an electric motor cannot be assembled with your own hands, and equipment from a washing machine or similar equipment will not work due to insufficient power.

Machine device and assembly

There is nothing difficult about assembling a homemade band saw with your own hands. Here you need to study all the nuances and prepare required material... The main part of a carpentry machine is a work table on which wood, metal, stone or synthetics are processed. The design provides for a circular movement of the cutting element, which affects the workpiece and is secured by two pulleys.

It should be noted right away that the drawings of a homemade band saw for wood are suitable only if there is a room of appropriate dimensions. The table top and bed with the installed unit have impressive dimensions that simply will not fit into small room... Such equipment is used for breaking up large logs, but a mini-machine is also suitable for processing small workpieces.

At the first stage of the work, drawings are drawn up in a special program band sawmill do it yourself. There is a mass already ready-made schemes for the assembly of this unit, but they may require some changes for the dimensions of the room, the amount of work and the material to be processed.

Bed and pulley block

The frame of the bed is a load-bearing part that supports the large weight of the entire structure. The load due to vibration during operation increases several times, which is why the bed must be made of metal profiles that must be welded. For machines of medium and small size, in the absence of metal profiles, it is suitable wood material, but it should be a solid board 20 mm wide, not chipboard or plywood sheets.

The boards are connected in such a way that the layers are connected at the intersection of the fibers. To further strengthen the frame assembled from the bars, self-tapping screws, special glue, fasteners and any other connection methods are used. As a result, the entire structure must correspond to the functions of a damper, which dampens jerks and vibrations resulting from the operation of the cutting element. For this, the bed must be rigid and resilient.

Another important detail is the upper pulley block., which keeps the canvas in tension. The wheel shaft is mounted in an insert located on the inside of the frame. The axle is adjusted by means of two threaded rods, which are mounted in wood material with nuts.

The upper (end) part of the bed is provided with a special screw mechanism, which is responsible for vertical movement along the guide. The entire structure is reinforced by installing additional washers that are welded to the surface. On the back side, a flange is provided on which the shaft for the groove is fixed.

Tabletop and pulley features

To make a pulley, you need several sheets of plywood, which are glued together, and then a hole is made in them for bearings. Plywood wheels should be about 30mm thick. The sawmill must be stable and therefore a bearing fixed on the coupling is additionally mounted. This can be done by installing a washer on the shaft with inside and securing the flange on the opposite side.

Next, the wheels should be shaped like a barrel and glue the surface with a bicycle tube or similar material. This will help make the belt move smoothly and center it on its own during operation.

If the bearing is not properly secured, then there is a problem with the wheel, which constantly hits the plane during operation. From this, the cutting element begins to slide and go to the side, which ultimately leads to damage to the processed material. To avoid such situations, the bearing is installed behind the perpendicularity of the shaft.

A self-assembled band saw for metal, wood or stone requires the installation of a tabletop on a pedestal base. Inside it is a motor and a trigger. They are responsible for the movement of the web, the speed and time of its operation. For the manufacture of such a table, plywood is often used, which is additionally sheathed with textolite.

The load on the tabletop is minimal, so this material is quite enough for work. To simplify the work, it is equipped with a variety of functions. For example, the tabletop is equipped with a swivel mechanism for the convenience of cutting the workpiece under given angle... A rip fence or the installation of a roller system will add horizontal movement to the table, which greatly speeds up machining.

Setting up band saw equipment

Serviceable and quality work carpentry installation depends directly on the setting of the equipment. There is a setup setup diagram. First, the wheels are set parallel to each other. Next, fluoroplastic washers are installed, which are necessary to prevent vertical displacement.

For the first time, the launch is performed without guides. At this stage, the smooth start-up and cleanliness of the engine are checked, and then a test cut is carried out using a blade, but with minimal loads. To work with an increased load, a block with guide belts is used. This design consists of two halves that are installed along the line of the cutting blade.

Previously, craftsmen made not only machines with their own hands, but also cutting blades. It is difficult to independently close the belt unit into a ring, and here at least some initial experience in assembling the machine is required. Sharpening according to the template is also carried out by hand. You can do all this yourself, saving your money, but modern market just stuffed with all sorts of gadgets and details that improve the quality of materials processing or make the equipment multifunctional. The main thing in this matter is to remember about safety precautions, because production models or homemade are a great danger to human health.

Bandsaw unit for processing wooden products is one of the main devices for high-quality woodworking on an industrial scale. In a home-based environment, it can be easily replaced with a simple electric jigsaw, but this unit can have high expectations in terms of production.

Modern wood band saws are easy to make with your own hands, using insignificant labor intensity, as well as the material component when equipping the equipment. This unit allows you to produce no less products, as it would be in the case of purchasing an expensive purchased mechanism, especially since it is not inferior in its characteristics in any case.

Areas of use

Using this type of unit for a band saw, you can make cuts with your own hands, while the accuracy remains at a height even when using the minimum work force... Therefore, such machines are often referred to as a jigsaw type. The basic principle of operation of this kind of units was laid in the basis more than a hundred years ago, and even at the moment such machines do not lose their relevance in terms of processing wooden products.

Naturally, today's models of this mechanism are an order of magnitude or two superior to their counterparts from previous generations in most technical indicators. But the basic components and the principle of operation have practically not changed. First of all, the circular saw, which is capable of performing cuts both true and oblique, has not undergone major changes.

A used wood band saw is capable of performing both high-quality sawing in a cut, and doing simple work for the processing of wooden products on a table. This feature of this mechanism provides a unique opportunity to perform carpentry work at specialized factories for the production of furniture, as well as most industrial wood processing complexes.

Modern belt-cutting machines are eminently common in combination with many well-known building materials. Basically, work is done on wood with your own hands, as well as on plastic and complex foam materials.

In the production of furniture, such machines are used primarily for cutting long boarding openings, as well as for sawing complex elements in wood. But the frequent use of tape machines is also becoming work on processing and cutting. metal structures... It is not excluded to work with materials such as:

Cast iron.
Complex non-ferrous metals.
Ferrous alloys.
Alloys made of durable metal materials, primarily made of stainless steel.

The main advantages of the band saw machine for wood, which is less used with the use of other devices of this type:

The ability to make high-quality cutting of the workpiece, the thickness and penetration depth, which can be at least 400-500 mm.
Ability to perform cutting areas exclusively in complex materials, which to a lesser extent can be used in other similar machine tools.
Cutting materials in the form of a curved trapezoid with a conical base.
When working on the machine, a minimum of waste, such as dust and shavings, is left for the band saw units, because the blank cut is always smooth and clean.
The band saw machine is very small, it takes up a minimum of space, with a low weight, thus, it is easy to install with minimal dimensions and without the involvement of additional working tools.
When the saw is in operation, its noise reaches the operator's membranes to a lesser extent and thus creates less discomfort.
A device of this class practically does not bother others who live in the immediate vicinity of the working mechanism.
The uncomplicated, almost elementary, design of the unit makes it possible to create an apparatus for a band saw mechanism by means of its own forces.

Technical capabilities

Every practical owner of such a mechanism should, before purchasing a machine, first familiarize himself with it. technical features, as well as with the principles of functioning when performing necessary work... Conventionally, all units for band sawing are divided into several types, which can be divided into the following main categories:

The size and indicative data of the products manufactured for a certain period of time.
The width of the belt row on the machine being processed.
The angle at which the mechanism is turned.
The number of speed modes for running the material.

The main indicator that determines the difference between a machine designed for an industrial scale and for single work in a domestic environment.

If the thickness of the tape does not exceed 13-14 mm, then it is best used in household work with an insignificant volume of products, but in the case when it is necessary to make a really large volume of products on an industrial scale, then thicker belts are used, as a rule, at least 20 mm to prevent the release of low-quality products.

The main location of the saw band on the device is horizontal and vertical. Thus, all machines of this type have only two standard classifications: horizontal machines and vertical machines.

A special console is installed on the vertical unit, which makes it possible to control the working process, based on special working parts. The device operator is able to take full control of his console while simultaneously monitoring the production process.

On small-sized mechanisms, only the saw surface is fixed in a special way, while there is the possibility of free movement of the main workpiece for the unit. Horizontal placement is primarily characteristic of machines with a horizontal belt. Their main purpose is to cut hard wood.

It is these belt machines that are often used for the professional cultivation of heavy metal plates and high-quality production of products.

Also, significant differences in the form of feeding the workpiece to a special working body are not excluded. In the mass production of products, complex automatic machines are common. They are distinguished by serial production. The supply of elements is possible using special vise holders, as well as an electric motor. The motor can also be made at home.

Homemade semi-automatic feeds are used primarily in procurement production. They differ from other types of machines in that they can be fed using manual feed, and their use is mainly due to domestic and domestic production.

The best example for a band saw is a Belarusian-made machine number MP8-1558-007. The sawmill of this mechanism is also Belarusian origin... With its help, it is possible to qualitatively process many complex parts with a width of at least 90-300 mm, with a length of 1100-8100 mm.

The mechanism for processing wood and metal under the number MP8-1558-007 has a standard power of no more than 8 kW, and the voltage for the operation of the machine does not exceed 380 V. The blade rotates at a frequency of at least 32 m / s.

Features of the structural assembly of the unit

Before you purchase and even more so make a mechanism with your own hands, you must first study specifications that will allow you to take a comprehensive look at the device and make an informed decision about its equipment.

The main components of a standard machine are as follows:

sawing mechanism;
electric motor;
platform for work;
bed for standard processing;
elements for guiding moment;
dampers for the enclosing surface.

In the event of an incident, complex brakes are activated, the pads of which instantly slow down the saw. In case of a potential rupture of the tape surface, the locks are set in motion, which slow down this process and stop the break of the template. It also does not hurt to install an element such as a guide ruler to ensure adjustment of the layer width.

What is the principle of a home-made machine that was in use?

First of all, it is necessary to fix it with high quality, while the probability of vibration of the desktop must be reduced to zero. This is extremely important for the stable maintenance of production volumes at the proper level.
The workpiece is cut along the guide line, when stopping with a movable stop. Special devices are capable of feeding the product at the required length.
Machines of this type are capable of cutting threads at a machining angle of at least 45 degrees.
Automatic feeding is carried out by a special roller bracket. It is on it that the workpiece of the required size is laid.
Using the rollers, it becomes extremely easy and simple to control the entire process of cutting the product, while the electrical unit itself does not pose a potential hazard, because in the conditions of factory assembly, special attention is paid to this moment.

Video: DIY band saw.

How to make a band saw mechanism with your own hands?

To make a vertical band saw at home, it is enough to have only a basic understanding of how the assembly process takes place.

First of all, they make all the necessary sketches of the unit and all of its operating component parts.
After that, according to the drawings, the mill is welded for the working table. As a rule, the dimensions of the table are as follows: 400 x 700 mm.
A tabletop is installed as a frame covering. Most often it is made from a plywood floor with a penetration depth of 20 mm.
By welding the transverse profile to the corner, a supporting bar is installed.
The upper and lower pulley becomes the main deck to provide a quality rubber sheet work surface.
By means of a special resin, a bush made of duralumin alloy is installed, inside of which an opening for the bearing is first grinded.
A motor is placed inside the tabletop, which is the drive for the operation of the machine. A drive pulley is attached to the engine.
To reduce vibration of the installation, a damper is installed, made with my own hands from textolite material.
If the machine overheats, it is imperative to give "drink" from time to time.

It is used for sawing boards, beams and other similar materials. It is manufactured by many manufacturers who provide the best performance for the equipment. To save money, you can make this unit yourself.

What is needed to get an efficient banding machine?

A homemade band machine is made according to ready-made drawings that are in the public domain. To perform such work, something else is also necessary:

find a few car parts;
select the appropriate rolled section type;
correctly carry out all the necessary locksmith and turning work;
carry out some manipulations with a welding machine.

To assemble the banding machine, you can use unnecessary pulleys taken from old agricultural machinery. It is best if their diameter reaches 300 mm. It is recommended to use as guides metal pipes two different diameters. The first should be half an inch and the second slightly larger. As a result, one pipe can be put on top of another and the required clearance of 0.5 mm can be obtained.

Making the base for the machine

The do-it-yourself woodworking machine is installed on a base of metal corners... They are fixed in such a position that the vertical shelf looks up. Maximum precision must be sought to prevent rapid wear of the impellers.

To the installed corners in the perpendicular direction, racks of shaped pipes(2.5x2.5 mm). Another element is mounted between them. It is a half-inch diameter pipe. It is on it that the claws are installed, designed to secure the logs. These devices should move freely in different directions. To fix the material, it is necessary to hit the clamp with a hammer, which will lead to its jamming.

Installation of pulleys for the machine

The presented homemade product cannot work without pulleys. When assembling this structural element, you must adhere to the following rules:

homemade pulleys are sharpened so that when the belt is put on, it protrudes a few centimeters;
the manufactured structure must move, which is ensured by the presence of horizontal pipe guides;
to increase the reliability of the unit, it is additionally fixed with bolts;
the pulleys are placed under slight angle, which will prevent slipping of the tape during the operation of the equipment;
the right pulley is driven, so a spring is attached to it. During operation, she automatically pulls it on;
the left pulley is fixed rigidly, since it is considered to be the leading one;
the diameter of the element is chosen arbitrarily, but the larger it is, the longer it is not necessary to change the saw;
a regular bicycle frame can be used as a strap;
for effective work the machine needs to place two pulleys as accurately as possible in the same plane;
it is best to use a self-aligning type bearing to secure the top element in position.

Recommendations for installing the roller assembly for the machine

A homemade wood band saw will work correctly and smoothly when using hardened rollers. The node that they are part of is best done by yourself. In this case, you can be sure of its reliability, which cannot be said about the finished mechanism. The design of this unit has the following features:

the mechanism includes three bearings. Two of them are 202 brands, the third is slightly larger;
the shaft and rollers are milled taking into account the use of saws different widths... If necessary, install a washer between the bearings;
the shaft enters two tubes installed one into the other, with a slight axial displacement;
the roller assembly is installed on a homemade machine with the ability to adjust in height or offset to the sides.

Table top

Varieties of cutting elements

wide saw blades provide high precision cutting. They are used for longitudinal sawing;
the thickness of the cutting element must match the thickness of the workpiece. Thick saws can damage thin material;
when performing shape cuts, the saw must have the optimal thickness and width to cut the workpiece at different angles.

Machine frame and other additional elements

To obtain a band saw, you need to make a frame. For this, use 100 mm. The height of the structure is 1.5 m. To strengthen the frame, gussets are additionally used. The block itself, with the help of which the logs are cut, will move along the channels due to the presence of stud-screws. To securely fix the cutting unit of the machine to its base, bolts with locknuts are used.

Other elements that must be present in the design of cutting equipment include:

Electrical engine. An old power tool (drills, hand-held power saw) can be used as a drive;
box for collecting shavings and wood dust. Made from ordinary wood or plywood sheet;
a wood or metal casing that covers the upper pulley. Increases equipment safety.

Saw adjustment

A homemade bandsaw machine driven by a drill or a conventional electric motor will not work efficiently if the saw is not adjusted.

This process follows the generally accepted scheme:

the parallelism of the wheels relative to each other is ensured;
to prevent displacement in the vertical direction, fluoroplastic washers are used, installed on the shafts;
the system is launched in trial mode without installing the guides;
test cut is carried out without load;
after the completion of the adjusting operations, a block is installed to form the direction of the belt movement.

If the saw of the machine is set correctly, the wheels move smoothly without jerking. Such equipment will delight you with great productivity and accuracy, which is especially appreciated among the masters.

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