Any construction or major renovation is unlikely to be completed without boards and various beams. In this case, all this material must be cut to the required size.
Of course, you can purchase ready-made boards or beams. But this will require large financial costs. Therefore, many home craftsmen and professionals prefer to do everything themselves.
And for this you need the right tool eg band saw. And in this case, you should not immediately run to the store to buy a machine.
If you have a little experience, then you will definitely be able to make a homemade band saw. And the technology of its production will be discussed in this article.
Preparatory stage
A DIY band saw will cost less than a factory-made version. But in order to make everything correctly, you must first understand the design itself. The band saw is designed for sawing wooden workpieces large diameter. As a rule, it is used to make boards or beams from logs.
The structure itself is a frame on which an electric motor and pulleys are mounted. The first is necessary for rotating the pulleys on which the cutting blade is attached. It is with its help that the workpiece is cut.
Before you start creating band saw on wood, it’s worth making a drawing. With its help, all further work will be faster and clearer for you.
1 – lower drive pulley; 2 - bed; 3 – band saw; 4 - V-belt A710; 5 - damper; 6 - guide; 7 – supporting rod; 8 – upper drive pulley; 9 - table, 10 – electric motor (AOL-22-2); 11 - belt drive pulleys; 12 – bracket; 13 - M12 nut, 14 – upper support; 15 – adjusting screw; 16 - slider
- metal corners, profile pipes, channels and rolled products;
- electric motor;
- pulleys from old agricultural machinery. Those that have a diameter of 30 centimeters are best suited;
- sheets of plywood or chipboard to create a cabinet;
- the cutting blade itself;
- welding machine and plumbing tools
You must first make a frame (according to the previously drawn up drawing). It is made from channel (100) by welding. The height of the frame should be about one and a half meters. It is also advisable to make a box under the frame; shavings will be collected in it. This design can be easily made from sheets of plywood or chipboard.
Carrier rod
Upper belt drive pulley
The damper is necessary to dampen vibrations of the tape. Made from textolite.
1 - base, 2 - M6 bolt (2 pcs.), 3 - strip, 4 - nut with washer
The guide serves for the correct feeding of workpieces
A homemade band saw consists of several basic elements. First of all, this is the frame. It is on this that the remaining components will be attached. An electric motor is mounted on the frame, which is connected to a pulley. You also need to make a device for feeding a log (or other wooden blank) for cutting.
Let's move on to the pulleys. There are two of them used in the design. In this case, the right pulley will be driven, so it does not require rigid fixation. It must be equipped with a spring, which is responsible for tensioning the canvas. The left pulley, which is the drive pulley, is fixed rigidly in its place.
The pulleys themselves are mounted on special guides made of pipes. In this case, it is necessary to provide for their fixation with bolts. The pulleys must be sharpened so that the edges of the belt protrude a couple of centimeters. Also, the cutting blade itself is installed with a slight inclination. In this case, it will tension itself, which will prevent the tape from falling off while the machine is operating.
Belt tensioning mechanism: 14 - upper support, 15 - adjusting screw, 16 - slider, 17 - cover, 18 - M4 screw, 19 - bearing 60203, 20 - oil seal, 21 - end washer, 22 - Grover washer
Saw band fastening unit (lower pulley)
1 - lower belt drive pulley, 4 - V-belt, 7 - support rod, 11 - belt drive pulleys, 19 - bearing 60203, 23 - washer, 24 - M6 lock bolt, 25 - spacer sleeve, 26 - axlebox housing, 27 - axle box cover, 28 - shaft.
Buxa for band press
Drive shaft of the tape machine
After preparation, all parts are mounted on the frame. The pulleys are connected to the electric motor using a belt drive (can be mounted chain transmission). Next, the power buttons are installed and the hand-held wood band saw is ready for use.
A very important element of such a machine is the cutting blade. Some craftsmen make their own saws. To do this, you can purchase special blanks made from steel strips. Next, using templates, sharpening is done.
Soldering area
The blanks are produced in the form of strips, and the machine requires a “ring”. To do this, the workpieces are welded. In this case, it is necessary to use a complex method. The point is that there should be no overlap. The connection of the strip into a single ring is done end-to-end. After welding, the joints are thoroughly sanded.
This complexity of manufacturing a cutting blade forces many to buy ready-made saws. Today there is a large assortment in stores similar products. The main thing is to choose the size of the cutting blade so that it fits your pulleys.
In addition, when choosing a saw, you should pay attention to the thickness. The higher this indicator, the larger the radius of curvature of the blade. For a more accurate selection, you can use special tables.
A DIY band saw can quickly recoup the time and money spent on its production. But this will be true if you follow the recommendations for operating such equipment. Experts give the following advice:
The cutting blade must be tensioned correctly. The amount of such tension will depend on the grade of steel used in the manufacture of the saw, as well as its width. This indicator can be measured using a special device - a “tyrzometer”;
You should not think that the saw will be able to work continuously for a long time. Experts recommend the following operating mode: cutting for two hours, then the blade is removed and hung in a free state for 12-24 hours. In this way you can extend the life of the saw;
Always use a lubricant, especially if cutting fresh wood. Newly felled trees produce copious amounts of resin. Its mass begins to clog the incisors. As a result, the saw begins to heat up and quickly fails. For lubrication (and simultaneous cooling), you can use ordinary water with the addition of simple detergent. In winter, experts recommend using a mixture of diesel fuel and motor oil;
After finishing work, loosen the cutting blade. When cut, it heats up and expands slightly. After finishing the work, the canvas begins to cool and decrease in size. If you leave it in a taut state, then marks from the pulleys will form, in place of which scuffs will subsequently turn out;
Follow the rules for sharpening teeth. Both the speed of the work itself and the service life of the cutting blade will depend on this. Also make sure that the teeth are always well sharpened and their alignment is correct.
It is also necessary to strictly observe safety precautions. A band saw is quite a dangerous piece of equipment. It is best to equip it with a protective casing. Such an addition will increase the safety of work, and help to improve the removal of sawdust.
Also, be careful when choosing where to install the machine. Of course, a homemade band saw will not take up much space. But still, there should be enough space around for free movement.
Also, take care of high-quality lighting workplace. Quite often such a machine is installed on the street. In this case, try to work only during daylight hours or with a good street lamp.
From the video you will learn how to make a band saw with your own hands from available materials.
If you have a hobby, it usually requires special tools. Hobbies are different, respectively, the amount of technology is also amazing. It can be very complex or as simple as a Soviet nickel. The first, for example, includes 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 repairs.
What kind of instrument is this?
A band saw is a cutting tool equipped with many cutters.
Actually, only the cutting surface is called this way, and the tool itself is called a machine tool. And it is precisely this that can be called working equipment. The band saw itself is a strip of metal, preferably steel, which is rolled into a ring. On one side there are teeth 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 connected to the mains is used to create movement. 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 may seem too high for the average person.
- Functionality - the point here is that a band saw is not always included in the list of required tools for a workshop. Most operations can be done without its help, which means there is no reason to purchase an overly expensive unit.
The second reason basically follows from the first - if the price were not too high, then most would purchase such an instrument. This is logical, because it is very convenient to work on.
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 it would be better to use metal for such a tool, but that’s not entirely true.
A band saw machine of this assembly demonstrates good performance, quite comparable to purchased models. In addition, the easily replaceable material allows you to instantly carry out Maintenance. Concern for replacement parts will fade 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), the saw for the band saws and the workpieces.
saw frame
Is the main one load-bearing element the entire structure. You need to use a strong tree - in no case not chipboard, not MDF, plywood or furniture board. A pine inch is perfect for this purpose.
The frame shape is C-shaped. On top you need to make a base 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 construction itself is multi-layered here - about six layers for strength. But that's not counting the additional overlays.
Gradual 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 support legs, but be sure to leave grooves of the required 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 were left empty. You need to fix the profile (preferably hardwood). It is a wooden rectangular frame, inside of which a movable holder for the upper wheel shaft is installed.
Corner joints of the frame can be reinforced with inserts. In this kind of work, reliability comes first.
The block itself must move freely. In the upper part, make a hole for a long bolt - this way the metal band saw can adjust the tension.
The shaft holder must have a tilt adjustment installed - usually a screw serves this purpose. The holder itself is fixed in place with two self-tapping screws. To achieve the desired mobility in the future, you need to leave enough play.
A metal lining is installed under the screw, and the shaft itself, after adjustment, will be fixed using another self-tapping screw.
saw wheels
Here it is quite appropriate to use those materials that were rejected earlier. For example, MDF or chipboard. The design on which the band saw is assembled requires wheels with a diameter of forty centimeters. The thickness may vary, but it is about two to three centimeters.
The construction here is also glued, made of several layers.
The crucial moment, as you might guess, is the central part.
Wheels can be made at 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. The flanges can be made from the same plywood. They consist of two parts - the first holds the bearing, and the second provides clearance between it and the wheel itself.
Diameter drilled hole should not strictly correspond to the threaded shaft - it is better that the first one is slightly larger than the last one.
You will need two wheels, since a band saw for metal or wood provides such a design. They are identical in size and are manufactured at the same time.
Also, to prevent the saw blade from slipping, you can give the initially round wheels a slightly barrel-shaped shape - this will help avoid many problems. The bevel angle on each side should be five degrees.
On one of the wheels, install a standard drive pulley, adjusted to the belt used.
The last part of the work is balancing. For this, small bearings are used to support the tape. The temporary axis is mounted horizontally, the bearings mentioned earlier are installed, and slight rotation is started.
To improve operation, you can make several recesses in the lower part of the rear side of the wheel - this helps to avoid rotation in any position.
Wheel fastening
The top one is installed first. Washers are put on the shaft. The wheel itself must be secured with a bolt plus a thick washer. It all screws into the end of the shaft. Using adjusting screws, install it parallel to the frame.
The lower wheel block is secured with clamps, after which it is hung on the frame. Next, set the wheels so that they represent one plane, parallel to vertical rack. Afterwards, do not forget to fix the lower shaft.
Setting the saw blade guides
Some skill is required here - place one of the ends of the tape (which is smooth) against the outer ring of the bearing.
It should be supported from the sides. You can use fluoroplastic crackers, but would be better suited wood - the latter wears out more slowly.
The protective casing is simply a cut pipe, securely fastened with self-tapping screws or self-tapping screws.
The tire must be installed with extreme precision - for a band saw, any misalignment will be noticeable. The tire is secured to the frame using a groove. You can mark everything on a wide canvas.
If you make a mistake with the groove, then simply widen it and make a corner of metal and a spacer from pieces of paper glued to it. Thus, the tape should stand straight. The corner, of course, needs to be carefully secured.
The latch is equipped with two holes. The first is used to press the tire as reliably as possible, and the second is used only when working with very thick workpieces. It allows you to lift the first part.
Instead of a conclusion
A very important procedure is the sharpening of band saws.
Moreover, the teeth must be smooth, otherwise the device will quickly become dull. You can use a regular sharpening wheel. Depending on the saw material - corundum, CBN or diamond. You also need to finish the job with fine-grained whetstone.
The main thing in such a process is to approach the matter wisely and patiently. A DIY band saw is a labor-intensive and long-term project. Mistakes are not allowed here. But if you do everything according to the instructions and consult the advice of experts, then soon a new tool will appear in your workshop.
So, we found out how to make a band saw with your own hands.
Carrying out with your own hands large quantity work in one direction or another, which involves the widespread use of boards, wooden beams and similar materials, is associated with the need to saw logs. It is clear that you can always purchase ready-to-use materials, which is not difficult nowadays, or you can buy a band sawmill for industrial use. But such decisions are associated with significant material costs, and this is not always justified.
A cheaper option is to develop your own wood band saw, but for this you will need to have drawings, a blade made of durable metal, cutting material, as well as some other parts.
The main part of such a home sawmill is the saw and the motor that will drive it. The best option is an engine with a power of 10 kW: in this case, you can easily cut any logs into boards using a home-made machine.
What do you need to make your own machine?
It is quite possible to assemble such a band saw machine with your own hands using ready-made drawings, thanks to this you will be able to saw any logs into boards right at home. To perform this work - manual assembly of the machine - you will need:
- some parts of old cars;
- long rolled products;
- Carrying out metalwork and turning works;
- minor welding work.
When assembling such a belt machine for wood, you can use old pulleys from any agricultural machinery, the optimal diameter of which is about 30 cm. The guides are as follows homemade sawmill It is best to do it with two types of metal pipes: a half-inch diameter and a slightly larger one, as a result of which the latter can be put on smaller pipes, leaving a slight gap of about 0.5 mm.
Making a base and a device for securing logs
At the first stage of carrying out such work with one’s own hands, a base is made for the future machine for turning ordinary logs into high-quality boards. Metal corners are suitable as a material for this. They should be installed with the side up, and it is necessary to achieve maximum accuracy in adjusting the wheels, otherwise they will quickly wear out.
Perpendicular to these corners, profile pipes measuring 2.5 × 2.5 mm are welded, between them there is a pipe with a diameter of half an inch, on which the claws, which are fasteners for logs, are attached.
Such fasteners should move easily in the right directions. To securely fix the log, it is enough to hit the clamps a couple of times with a hammer, as a result of which the mechanism for fixing the material will jam, and all the required operations can be carried out with it.
At hand-assembled saws belt type profile pipes made of solid metal, which are installed perpendicular to the base, should be made in such a way that they protrude slightly beyond the base. In addition, jumpers should be installed on these pipes: logs will be placed on them before sawing on the machine.
How to install pulleys correctly
The machine pulleys should be sharpened in such a way that when putting on the belt protrudes beyond their edge by a couple of centimeters. This entire structure moves along special guides - pipes, which are located horizontally. This unit, if necessary, can be fixed in the desired location using bolts.
To prevent the tape from falling off the pulleys while working on the machine, they need to be installed not parallel, but at a slight angle - as a result of this installation, the tape will “pull” itself onto the rollers while the saw is running.
The right pulley is used as a driven pulley, so it is necessary to attach a spring to it that automatically tensions it during operation. The left pulley, therefore, is the leading one, so it must be firmly fixed when manually assembling the tape machine. When changing the size of the saw, the drive pulley must be moved.
How to make the correct roller assembly
In a self-made band saw machine the best option will use hardened rollers. The right decision will make the entire assembly with rollers with his own hands and be confident in its reliability, and not use a ready-made one.
This unit consists of 3 bearings, two of which are grade 202, and another one, at the rear, is slightly larger. The shaft and rollers must be turned in such a way that if the width of the machine saw is reduced or increased, it remains possible to install washers between the bearings.
The shaft should fit into two tubes: a half-inch and a slightly larger one, inserting one into the other. In a half-inch pipe, the shaft should have a slight axis offset; in fact, it is welded to the bottom wall.
This entire machine assembly, which consists of tubes and a shaft, is attached to the guides with your own hands in such a way that it is possible to adjust the roller assembly in height, move it to the sides depending on the diameter of the logs processed on the machine made by yourself, and also securely fix it after completing the adjustment.
Frame and additional elements
The frame, the height of which should be one and a half meters, is made with your own hands from channel 100; to give the structure additional rigidity, it is reinforced with gussets. The machine block, which will cut the logs, will move along the channels using pin screws. Rigid fixation of the cutting unit of the saw to the sawmill is carried out using bolts with locknuts.
To make the machine more convenient to use, you can do it yourself additional device, in which the chips will collect. In the simplest case, this is an ordinary wooden or plywood box; you can also use something else similar.
Thus, you can make a homemade band saw according to the drawings yourself, even in a garage or small home workshop. But thanks to this homemade instrument With a saw, you can produce boards right on your site by sawing logs.
Working with such a tool, made using ready-made drawings with your own hands, is quite simple. By placing a log on the bed, fixing it and turning on the mechanism, he will quickly make the necessary processing of the log using a band saw.
During use homemade machine it is necessary to constantly ensure that his saw always remains sharp, and also adhere to safety regulations.
DIY band saw - is it possible? There is an answer to this question, and it is positive. If you are a simple do-it-yourselfer who is faced with independently sawing unprocessed logs when building an outbuilding made of wood, chopping firewood, or if you need to update wooden fence, then a DIY band saw will help you solve this problem easily and quickly.
A band saw is essential for sawing rough logs and chopping firewood.
Do-it-yourself band saw is a very labor-intensive process, this should be mentioned right away. You will need many components, welding and turning work, sharpening the saw in a special way, but the most difficult thing in this process is to achieve smooth operation of the entire complex.
It’s easier, of course, to purchase a ready-made sawmill for permanent use (for commercial purposes); it’s not cheap, but it will quickly pay for itself. If the desire to make such a structure as a band saw for cutting wood with your own hands remains firm, then read on...
Band saw - step-by-step creation process
As a sample, the principle of strip cutting for wood looks like this: take two coils from under ordinary thread, a thin braid (ribbon) is threaded and stretched between them. By forcibly twisting the braid, the log is cut, and the distance between the braids is the desired size of the beam. These saws are convenient for cutting boards.
To make a band saw with your own hands you will need:
- Select a room where it (the band saw being created) will then be used, preferably with an area of at least 18 m2 (approximately 6x3 m), checked.
- Then you need to make work surface table with a typical size of 42x72 cm. Such a table is cut out of a plywood board 20 mm thick, then textolite is glued to the surface of the plywood rectangle. Table edging is done wooden slats along the perimeter. It is also worth providing special grooves to support the wiring of saw blades. The finished table will be a box with dimensions 420x720x500, with a plywood thickness of 20 mm.
- Connect the supporting rod to the table - a section of channel 8, 68 cm long. For practicality, it is advisable to cut the shelves about 20 mm. It is recommended to secure the rod to the table with a bracket (angle 40x40 mm), using 4 M8 bolts. The saw drive pulleys are machined from plywood, and their surface is covered with sheet rubber using polyurethane glue. Next, impregnate the pulley with epoxy resin, sand it and paint it.
- With help epoxy resin glue in a duralumin sleeve, in which you need to machine a special seat for the ball bearing. Next, the lower pulley is mounted on a steel axle, which is mounted in an axle box (it has two ball bearings), the axle is mounted at the lower end of the rod. At the other end of the axle, a driven belt drive pulley is mounted through a spacer bushing. After this, the belt pulleys are balanced.
- To dampen vibrations during operation of the band saw, you will need to install a damper. Its fixed part is attached under the work table, and the moving part - the bar - helps to set the required gap when cutting wooden element. The damper is made from textolite parts and is mounted on M6 bolts. The upper damper is mounted on the machine with M5 bolts using a bracket above the table surface by 105 mm. Only if there is a need for the pulley to “hit the diameter”, in other cases it will simply increase the friction of the belt.
- Install a guide from a steel angle 100x100 mm. She will serve wooden beam for cutting. The perpendicular planes of the angle are ground on the machine. A corner is installed along the edge of one shelf, on which it is necessary to cut 2 grooves to correct the gap between the tape and the guide bar. The cutout in the middle is needed to increase the strokes of the bar. For safety reasons, it is advisable to insulate the upper pulley assembly with a protective casing.
- Form the band saw itself, that is, the sawing band. This product must be very flexible, made of cold-rolled sheet steel (U8 or U10), with a thickness of 0.2-0.4 mm (0.4-0.8 for harder rocks), a length of 1600-1700 mm for the dimensions described machine Before sealing the tape into the ring, you will need to cut teeth on it at intervals of 3 mm. Soldering is done using gas burner, first the soldering area is sprinkled with borax, and after soldering, PSR-40 solder is applied. Additionally, it is advisable to sand the soldering area and once again firmly press the seam with pliers. Sharpen the teeth and spread them slightly to the sides for the most effective cutting.
This method of producing a band saw is considered artisanal. When working, you should observe safety precautions, since if the sawing band breaks, it flies to the side, so you should not stand nearby while the band saw is in operation.
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The difficulty of making a homemade band saw
Welding is necessary to make a homemade band saw.
With a heavy load of cutting wood, up to 300 kg, the band saw must be as stable as possible, and the installation itself must meet all the requirements of safety rules during operation. Assembly will require welding, power tools, milling machine, be able to properly sharpen the sawing band.
There is also an option to order or buy a ready-made belt mechanism frame with wheels, and purchase one for it metal wheels trolleys and band saws. Independent production Such parts will require experience and high-precision finishing with special tools.
Having assembled such a structure, it is necessary to install guides using I-beams, channels, as well as corners or anchors to stabilize the support under them every 0.5 m. Maintaining the geometry, weld all the parts together. When installing guides in this way, it is necessary to leave a reserve for the largest log of up to 70 cm. Next, the wheels, the belt mechanism frame itself and the electric motor through a pulley are attached to the cart.
Tip: Think about the mechanism of change horizontal movement saws relative to the log.
By moving the cart relative to a fixed log, a horizontal layer of wood is cut off - this is how boards are made.
Residents of their own homes, who prefer to do everything on the farm with their own hands, often have the need to saw wood blanks. Buying a ready-made device for these purposes is quite expensive. Making a wood band saw with your own hands is not the easiest task, but for a hardworking person it is quite doable. The main motivation is saving Money, since old disassembled furniture and other available materials can be used to create structural elements.
Design and scope of band saw
A band saw assembled using the technology provided can be used both at home and for industrial purposes, for example, at a private sawmill or a small woodworking enterprise.
Depending on the specific application, the design of the tape apparatus may vary somewhat, but the main elements are always the same:
- Stable frame– predominantly wooden, since its manufacture does not require welding, which greatly simplifies the assembly process.
- Electric motor– ensures the functioning of the device (for a home band saw, a drill attached to the pulley shaft is suitable).
- Pulleys– rotating mechanisms that are installed on the frame of the device provide fastening and movement of the saw blade.
- Cutting tape– a sharp saw blade that moves quickly and cuts through a wooden workpiece (there are types for metal and polypropylene).
- Rest structural elements – belts, table top, guides, protective cover, container for collecting sawdust and others.
The main advantages of a wood band saw
Compared to other types of sawing machines, a wood band saw has a number of significant advantages:
- High performance and low heat dissipation.
- High speed, accuracy and cutting quality.
- Excellent maneuverability, allowing you to cut not only straight, but also shaped workpieces.
- Safety – using a band saw is much safer than its disk or chain version.
The main advantage of a homemade band saw is that it is cheap to manufacture and use.
The process of making a wood band saw with your own hands
Making band saws with your own hands is a responsible and time-consuming process, but the savings in money, availability and quality of the work performed compensate for this.
Frame requirements and preparation
To make a supporting frame, you should choose a thick beam from hard rocks wood (maple is perfect). This is necessary so that the design of the device can withstand future loads and does not vibrate during sawing work.
Initially, you need to develop a drawing of the future band saw. It can be schematic or detailed, indicating the dimensions of each element of the apparatus. The height of the frame directly depends on the size of the room and the characteristics of the planned use. It is necessary to consider the height of the table, its dimensional characteristics, the diameter of the pulleys and the length of the supporting beam. After all the calculations have been carried out, individual elements are made from available material.
Frame installation
The band saw frame is a C-shaped base consisting of a supporting beam and two supports for pulleys attached to it, for the manufacture of which thick multi-layer plywood can be used. The supports must be installed at a sufficient distance from each other, taking into account the specifics and dimensions of the materials planned for cutting on the machine.
Table assembly
The dimensions and height of the work table are selected individually for each master. An important requirement is that two pulleys (driven and driven), an electric motor and a chip box must be placed under the table. Often workplace They are made in the form of a closed cabinet containing all the described parts. The tabletop must have a slot for the cutting tape.
Pulley installation
The diameter of the pulleys can be any, but it must correspond to the dimensions of the entire apparatus. To work with wide canvases, you should choose wheels with large diameter and thickness. The ends of the driven wheels must be convex, which ensures self-centering of the cutting blade, and the drive wheels (belt drive pulley) must have a recess that guarantees reliable fastening of the belts.
To protect the wood, you need to stretch bicycle inner tubes over the ends of the wheels, or you can wrap them in several layers of electrical tape, but this method is only suitable for small devices.
To adjust the belt tension, the upper pulley must be mounted on a movable block equipped with a handle, which, when rotated, pulls the wheel up, as well as a special screw that loosens or fixes the structure. Lifting mechanism It can be anything that is left to the discretion of the master. Instead of a bar, handle and screw, a lever, a very tight spring and bolts provided at different levels may well be used.
The lower part of the device consists of two wheels mounted on one shaft. The cutting blade is pulled onto the first wheel, located parallel to the upper one, and the second one acts as a drive and is connected by belts to the electric motor.
Selecting a canvas
You can make a cutting tape yourself, but this is unnecessary and unjustified work. The accuracy and aesthetics of the cut is influenced by the quality of the tape sharpening. Therefore, it is better to purchase ready-made tape. The choice of their varieties in stores is huge; they differ in the number of teeth, the spread of the teeth and their sizes (small, medium or large).
Device settings
Before starting work, the band saw is carefully prepared and tested for Idling. You need to check that:
- the wheels are located strictly parallel to each other, and their rotation is easy, smooth, without jerking or beating;
- the cutting belt is well tensioned and is strictly perpendicular to the working plane.
Failure to comply with the specified requirements can lead, at best, to a distortion of the cut, and at worst, to the tape jumping off the wheels, which is dangerous to the health and life of the master. An excellent design solution is the installation of guides made in the form of a bar and three roller bearings holding the tape (instead of two side ones, they can be used wooden blocks– limiters). The safety of the entire structure will be ensured by a special casing consisting of two separate parts covering the pulleys.
Possible problems
When manufacturing a band sawing machine, some difficulties may arise:
- You need to be able to prepare drawings and work with them.
- You will need a variety of equipment, such as a jigsaw, a circular saw, drill, screwdriver and more.
- It is necessary to ensure the stability of the entire structure in order to subsequently process heavy materials.
List of disadvantages of a band saw for wood
A DIY wood band saw, in addition to its advantages, also has several disadvantages:
- This sawing machine can only be stationary and is not suitable for transportation to different places.
- He has big sizes and takes up a lot of space.
- The device makes a lot of noise when operating.
- The cutting area is limited.
