A wood band saw is one of the main types of equipment for woodworking industry enterprises. At home, it can be successfully replaced with a simple jigsaw, but the device allows you to perform work in much larger volumes.

Low labor and material consumption in manufacturing allows you to make a DIY wood band saw. After all, why spend extra money on purchasing expensive imported equipment when you can independently assemble a device with your own hands that is not inferior in characteristics?

1 General information

Using a band saw for wood allows you to make cuts with your own hands, with an accuracy that is not inferior to cutting using a jigsaw. Because of this, they are often called jigsaw-type band saws. The operating principle of such machines was proposed back in the 19th century and remains relevant in the field of woodworking to this day.

Of course modern models on the head superior to the first woodworking machines both technologically and different design features, but the basic elements and operating principle remain the same. The main feature remains hole saw, which can perform straight and curved cuts.

The woodworking band saw machine can carry out both high-precision cuts and perform rough processing work. Due to this feature, these machines are used for carpentry purposes in furniture factories and various enterprises of the woodworking industry.

1.1 Application of band saw machine

Band saws are common in their application with most known building materials. First of all, it’s working with wood, as well as plastic and foam. In furniture manufacturing, such machines find their role in cutting long boards having a large thickness, cutting out individual wooden elements.

In addition to wood, band saws are excellent at processing and cutting metal. Processing work with cast iron, non-ferrous and ferrous metals, stainless steel and even alloys of high-strength metals is possible.

Band saws have a lot of advantages that are not available when using other devices:

• the ability to cut workpieces whose thickness reaches 400 millimeters;
• performing cuts of complex configurations that are inaccessible to other machines;
• making curved cuts;
• working on a band saw leave a minimum amount of waste in the form of dust and shavings, due to the fact that the cut of the workpiece is smooth and clean;
• the band saw woodworking machine takes up little space and is also lightweight, so it can be installed at the workplace without the use of special equipment;
• the noise of the saw does not cause discomfort to the machine operator and does not disturb others if the machine is located near residential buildings;
• The simple design of the device allows you to make a band saw machine with your own hands.

2 Main types of band saws

Before purchasing a band saw, it is advisable to familiarize yourself with its technical characteristics, as well as the capabilities of performing the work you need. Conventionally, band sawing machines can be divided into groups according to the difference in the following indicators:

• volume of production per unit of time;
• width of the belt in the machine;
• rotation angle;
• number of speed modes.

Division into machines for use in household needs and for industrial production is carried out mainly due to the difference in the width of the tape. Tape with a width of up to 13 millimeters generally used for small, domestic volumes of material processing. In industry, tapes with a width of 19 millimeters are common.

The saw blade can be positioned vertically or horizontally. These bandsaw machines are divided into vertical and horizontal. Vertical apparatus Of large size, the only moving elements are the console with the working element.

Band saw machines also differ in the method of feeding the workpiece under the working element. Automatic machines are common in the mass production of products that are mass-produced. The material is fed using a vice and an electric motor.

Semi-automatic machines are used primarily in the procurement industry. Their main difference is the ability to manipulate the saw frame when using the automatic mode. Manual machines involve supplying the material with your own hands and are used primarily in domestic household production.

Among others, it is worth highlighting the woodworking band saw machine MP9-1668-006. Manufactured in Belarus, the MP9-1668-006 sawmill allows you to process parts with a width of 80 to 400 millimeters and a length of 1200 to 8200 millimeters. The MP9-1668-006 machine has a power of 7.5 kW and operates under a voltage of 380V. The blade rotation speed reaches 33 m/s.

2.1 Band saw for wood and metal JET (video)

2.2 Design features

Before purchasing, or, especially, making a machine with your own hands, it is necessary to study in detail the structure of the device of this model in order to have a complete understanding of the design and capabilities of the unit.

The main elements of each machine are:

• saw;
• electric motor;
• working platform;
• C-shaped bed;
• upper and lower pulleys;
• guide elements;
• barrier flaps.

In case unforeseen situations, the brake mechanisms come into operation, instantly stopping the saw. In case of possible rupture of the tape, production safety is guaranteed by clamps that stop it. It is possible to install an additional element, which can adjust the width of the intended cut - a guide ruler.

2.3 Operating principle of the machine

The instructions for using the machine involve several mandatory steps that work on the principle of the mechanism of a tape machine. First, the wooden workpiece is properly fixed to avoid vibration of the workbench. This affects the ease of working with the machine and directly affects production volumes.

The workpiece is then cut along a guide line, or a movable stop can be used. Shaped cutting is carried out clearly along the contour of the applied markings, as well as with the use of special devices that ensure the supply of workpieces.

Wood band saws can be used for curved and straight cuts, as well as curved and 45-degree cuts in wood.

If cutting is used in automatic mode, the removable feeding device greatly facilitates the work process. The automatic feeder is a bracket with rollers on which the workpiece is placed.

With its help, when carrying out the necessary manipulations, cutting and sawing becomes much easier to control. And most importantly, we must not forget that any electrical equipment represents a source of potential danger and requires necessary measures precautions when working with it.

2.4 Making a band saw machine with your own hands

Making a wood banding machine with your own hands does not require special skills, but only basic understanding of metal and wood processing.

First of all, all required sketches of the product and its main components are completed. Then, the desktop frame is welded with your own hands according to the completed drawing. The classic dimensions of the table are 420x720 millimeters.

The tabletop must be installed on the frame. It is preferable to make it from plywood 20 millimeters thick, followed by pasting with textolite. Then you need to attach a support rod to the table, which can be made using channel No. 8. To secure the rod, a transverse profile is welded to the corner.

Next, you need to make a base for the upper and lower pulleys. This can be done using plywood 20 millimeters thick, covering work surface pulleys with sheet rubber. The working surface must be barrel-shaped in order to be able to hold the saw blade. Using epoxy resin, a duralumin bushing is glued into which the bearing seat is pre-machined.

The lower pulley is placed on the steel axle and secured with three screws. The axle is inserted into the axle box, where 2 ball bearings are installed. The axle box itself is installed in the lower zone of the rod. A belt drive is attached to the second end of the axle.

A motor is installed inside the table, on which the drive pulley is attached. Both the first and second pulleys must be located in the same plane and connected by one belt drive.

A support is fixed to the top of the rod and an adjusting screw is attached to it. The upper pulley is fixed on the axis where the slider is located. The resulting knot is attached to the rod and secured with a special feint.

In the place where the canvas passes through the table, you need to install a homemade damper made of textolite, which reduces the overall vibration of the installation. Next, you make your own sheet steel casing that protects work cloth. At the end of the work, a switch with a wire and plug is installed. From it the wiring is connected to the electric motor. This completes the production of a do-it-yourself wood banding machine.

All photos from the article

When cutting lumber at home, you can actively use a homemade wood band saw or factory products purchased from specialty store. The product is a stationary device or hand tool, the cutting part of which is a flexible closed-type steel strip.

As for machines, the canvas in them can be positioned both vertically and horizontally. About positive and negative qualities products are described below.

Pros and cons of the device

List of important advantages

• The cost-effectiveness of use is primarily due to the relatively small thickness of the cut.
• A high level of productivity is achieved thanks to sufficient high speed cutting
• The low price of products provides an opportunity to significantly expand the circle of main consumers.
• A long period of operation of the device is ensured due to its special design.
• When used, no excessive noise is created, which means that work takes place in comfortable conditions.

Some disadvantages

• When setting up, inexperienced users may have problems, as this process is quite complicated.
• Due to the presence of a closed system, a protective mechanism must be installed on the opposite side.
• In force design features, the product is more suitable for longitudinal cutting.

Note! Choose between manual and stationary device is done depending on the type of work being carried out. Small tools easy to use, but cannot be used for cutting volumetric elements.

Selection of finished products

There are not very many people who know how to choose the right wood band saws. Therefore, those who are not in the know are encouraged to familiarize themselves with the basic recommendations and criteria. In the acquisition process, the first thing to consider is technical specifications models.

General points

The accuracy of the cutting mode is determined by the feed and cutting speed. There are recommended ranges within which the operation should be performed.

As productivity increases, the durability of the web decreases. This must be taken into account when choosing.

Particular attention should be paid to the device manufacturer. If he has a good reputation and has been operating for a long time, then in most cases his products turn out to be of high quality.

The main components should be carefully inspected: the portal, the moving mechanism, guide elements, rollers and pulleys.

For sawing timber, a portal made of square pipes with reinforcing profiles. The lack of additional rigidity can lead to deformation of the main body. However, minor work can be done without additional reinforcement, which will have a positive effect on the cost of the product.

Reliable manufacturers make guide parts from solid metal. When using conventional pipes, kinks may appear after some time, and this leads to additional difficulties during maintenance devices.

For safety reasons, it is recommended to purchase products with double insulation or a separate grounding plug. There must be good visibility around the area intended for work. An additional advantage can be considered the presence of a special locking switch.

The specifications of a wood band saw can vary greatly depending on the type of device. For comparison, a table is provided that shows the parameters for three stationary models.

Details about the canvas

The choice of cutting part should be given close attention, as this will affect not only the quality of cutting, but also, to some extent, productivity. In addition, the service life of the canvas will depend on the correct purchase. If you use the wrong tape during work, its service life will be short.

Creating the Foundation

The frame can be made from sanded boards glued together with an overlap. The thickness of the elements used should not be less than 25 mm. It is not recommended to use wood boards and furniture panels for the base, as they do not have the necessary strength.

Frame in in this case will be C-shaped. To increase the rigidity, additional pads are attached to the six layers of glued wood. The parts must be fixed sequentially, while controlling the perpendicularity of the fragments.

Moving block device

After assembling the frame, a special device is installed to fix the upper roller, which will ensure tension of the cutting blade. To do this, a special profile is installed to create a guide groove.

You can strengthen the corner joints with additional inserts. After their installation, quarters are selected on each side to arrange a place for installing the guide elements. The frame should move freely in the grooves without any play.

A long bolt is installed on top, which is necessary to adjust and move the cutting edge. The inclination of the wheel can be varied using a special screw. It is mounted directly on the holder.

An additional metal gasket is installed under it. The shaft in the frame is secured using self-tapping screws.

Making rollers

The wheels of the device are cut from plywood or MDF. They are created by gluing together several layers wood boards. The most difficult moment is the formation of the central part of the rollers, since they must rotate during operation of the device.

The shafts are manufactured directly for the purchased bearings. On the one hand it is done internal thread, and on the other – a limiter. Before drilling the hole for the bearing, you need to make four holes for the dowels.

The finished product is connected to the engine, after which the central part is ground down to required sizes. A base made from a bicycle inner tube is glued to the work surface.

This reduces operating noise and prevents roller slippage. After this, balancing is performed.

When the wheels are completely manufactured, a drive pulley is made on any of them. Its thickness must be strictly adjusted to the belt used. As for the diameter, it is calculated so that the speed of the web is a certain amount meters per minute.

Wheel fixation

The top element is installed first, and then the bottom. To do this, fluoroplastic washers are installed on the shaft.

Fastening is carried out with a large bolt and washer required thickness. The fixing part is screwed directly into the end of the axle.

Web tension

Before this operation, adjustment of the guide elements is required. Only after this the band saw is tensioned on the wood. When the work is carried out correctly, a stable position of the blade on the pulleys is ensured, as well as its stability in the cut.

Construction of a desktop

The first step is to make a support part equipped with a tilt mechanism. A special bearing block is fixed to it.

A chipboard backing is attached to the turning device. It will increase the rigidity of the structure to some extent.

You can use a piece of old tabletop as a top cover. A rectangular hole is made in the working area, after which an MDF insert is installed.

Work must be carried out with the saw turned on. The element is pushed in all the way, and a cut is made along its length.

Cabinet installation

The dimensions of the structure depend primarily on the dimensions of the resulting base. The main material is a tongue-and-groove floor board 35 mm thick.

The cabinet frame is assembled using dowels. Angles with inside must be reinforced with metal corners.

• For comfortable work you can make a backlight working area using a conventional lamp equipped with a flexible bracket. In this case, the wires are passed through the frame.
• It is also advisable to build rip fence based on eccentric. With this option, a special grip is fixed on the opposite side of the element, resting against the edge of the desktop.
• It is recommended to install protective covers. They will remove chips and at the same time act as guide parts. MDF boards with a thickness of 8 mm are suitable for production.
• After assembling the structure, everything wooden elements should be treated with an antiseptic composition, otherwise mold and signs of rotting on the outer walls of the homemade device cannot be avoided.
• Load-bearing parts must be made only from so that the service life of the device is relatively long. This primarily concerns the supporting frame and holding parts.

Final part

Novice craftsmen can repair wood band saws of this type at any time on their own, since they are already fully familiar with the manufacturing scheme. The main problems mainly arise with the wear of the elements that hold the cutting blade.

For more information, see the special video in this article.

Any construction or major renovation is unlikely to be complete 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

Band saw doing it yourself will cost less than its factory 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 working on creating a band saw for wood, it is 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 a 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 piece of wood) 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.

Axle box 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 (a chain drive can be mounted). Next, the power buttons are installed and the hand-held wood band saw is ready for use.

Very important element of such a machine is a 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 apply 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 carefully sanded.

This complexity of manufacturing a cutting blade forces many to buy ready-made saws. Today in stores large assortment 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 more precise 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 special device– “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 plain water with the addition of a simple detergent. IN winter period 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 tense state, then marks from the pulleys will form, in place of which abrasions will subsequently appear;

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. This addition will improve work safety and help improve sawdust removal.

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 when there is a good street light.

From the video you will learn how to make a band saw with your own hands from available materials.

Band saws are powerful industrial tools for cutting wood and metal. The cutting blade is a continuous belt moving in one direction along the drive pulleys and interacting with the material being cut on one side. Given the relative simplicity of the design, a DIY band saw is quite possible. We will tell you how to do it and how to configure it correctly in this article.

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

• The hole saw cools naturally - a small part of it is in contact;
• Moving the teeth in one direction causes less damage to the cutting area;
• The tape is easier to sharpen;
• The drive and tension mechanism is simplified as much as possible, as is the lubrication mechanism.

But on the way to implementation, some difficulties arose related to connecting the saw blade into a ring. The tape must be strong, resilient and, at the same time, flexible and sufficiently elastic. Weld such metals that there are no seams left that interfere with its movement in the body of the material and cause overheating (resulting in rupture at the joint).

On wood band saws these difficulties could be 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 resistance welding and then the seams were carefully sanded.

Currently, several types of circular saw blades are produced:

• toothed;
• friction saws;
• electric spark.

As a rule, it is guided by a toothed blade of a bimetallic structure. This is a tape made of durable steel (spring or similar in properties) with teeth made of especially strong tool steel with hardness M42-M71. The sharpening of teeth is different for different materials.

For example, for cutting pipes and channels you will need a tape with reinforced tooth backs, for stainless steel - with sharp sharpening at 15 0 and an increased distance between them. When sawing, stainless steel produces 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 routing - narrow and wide alternate, to eliminate the threat of the tape getting stuck in the cut.

In order for your DIY band saw to work properly, design it for a factory-made band. It’s quite difficult to make it with your own hands, even if you can find 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 cut wood and metal:

• vertical;
• horizontally;
• at an angle.

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

Main components of a band saw:

• The bed (frame) is made heavy and durable. It should ensure the stability of the machine during operation and the absence of vibrations;
• Work table with stop and ruler;
• Drive pulleys;
• Engine (from 2 kW);
• Control panel;
• 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 sawing speeds for homogeneous solid metals are given in the table, but for each specific model saw and saw blade, they may differ within 10-15%.

DIY band saw

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

Manufacturing of the bed

The initial stage is the manufacture of the frame. For a wood saw, it can be wooden or metal, for metal - only steel. It can be welded from a channel or a 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 being processed. A normally sawing homemade machine can cope with wood up to 350 mm thick and metal several centimeters thick.

The supporting rod is channel No. 8, which is welded to the frame or bolted. It must be strictly vertical and secured at at least two points along its length to eliminate the risk of deflection. When biting the saw, for example (which sometimes happens) or sawing large material, the loads arise quite large.

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

Installed at the bottom of the frame asynchronous electric motor with start capacitors, connected by a belt drive to a drive pulley of variable diameter. If it is necessary to change the cutting speed, the V-belt is simply transferred to a different diameter. Belt tension is provided by a spring tensioning mechanism.

Drive installation

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

The machine is protected from belt beating 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 the working area. This is justified if the machine is designed to work with large workpieces or is required exclusively high precision sawing.

Lubrication system and protection

Lubrication system (adjustable), installed above the work table. The oil flows by gravity to the saw blade in the required quantity, which for each homemade machine determined experimentally.

All working units where anything rotates or moves must be protected with casings. It is best to make them from waterproof plywood with a thickness of 10 mm. It's inexpensive, and sanded plywood painted with enamel looks very good.

Start system - standard button with the ability 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 is used to select falling sawdust, the second is to access the pulleys and adjust the speed of the belt.

Do it yourself band saw for an experienced locksmith it will not be special labor. Part necessary details and components 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 yourself. In any case, a self-made machine will cost twice as much as a factory machine, with the same level of performance and adjustment accuracy.

A do-it-yourself band saw can be made even by a person without relevant work experience.

A homemade band saw is an indispensable assistant when working with wooden products.

When selecting accessories for a home workshop, a band saw is most often not included in the category of basic tools, since most operations can be performed without it. However, there are times when you can do without of this device it won't work.

Drawings homemade saw tape type can be seen in Fig. 1 and 2.

The performance of the jig will depend on the motor, saw blades and workpiece used.

Sequence of actions for making a band saw

Elements that will be needed to build such a structure:

• grinding machine;
• metal corners;
• steel sheets;
• plywood sheet;
• wooden slats;
• screws;
• pliers.

How to make a frame for a saw?

To build a band saw, you must have all the tools.

The main element of the machine is the frame. It can be glued together from several layers of overlapping boards. The frame cannot be made of chipboard, MDF, plywood sheets or furniture panels. The design is C-shaped. A base for the guide of the tension device with an upper wheel is installed on top, and several legs are fixed at the bottom, which are connected to the base. The frame should consist of 6 layers and overlays. To increase rigidity, diagonal jumpers should be installed. During the process of step-by-step gluing, you need to ensure the perpendicularity of the elements. This is necessary so that the frame turns out flat.

On initial stage the frame is glued together without a base, but it is important to provide appropriate recesses. It is most convenient to glue the base after installing the lower wheel axle block. The base should be sanded and varnished in several layers.

Wheel fixation block

Figure 1. Drawing of a homemade band saw: 1 - band drive pulley, 2 - base, 3 - band saw, 4 - A710 V-belt, 5 - damper, 6 - guide, 7 - carrier rod, 8 - band 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.

The first step is to assemble and install the movable wheel fixation unit. It should move vertically and tension the saw blade. To do this, you need to fix the oak profile. The block is a rectangular frame with a wheel shaft holder installed. To strengthen corner connections, you can install additional inserts. Once the frame is glued, you will need to cut the recesses in the corners. Next, triangular inserts are cut out and the recesses are glued in. On the sides of the frame you need to select quarters for the guides. The frame should move freely in the recesses. The springing effect in the process of tensioning the canvas will be created by oak plates.

Next you will need to install saw wheels with a diameter of 40 cm. They can be made of MDF or plywood sheets. Blanks can be cut using a milling machine. In the central part of the circle, you need to drill a 0.6 mm hole, and then install the central part of the router compass into it. This hole can then be used to align the workpieces. It is recommended to make circles with an allowance of a few millimeters for final processing.

Before attaching the flanges to the wheel, you will need to cut out the lower wheel shaft retainer. It must be secured to the bottom of the frame. The part is made from wooden slats. It is not recommended to drill a hole in the frame, as the drill may move away. The holder can be rotated to the angle required for correction.

Several technological recesses must be drilled in the wheels so that during the gluing process the plates can be threaded for additional fixation.

Construction of a working base, rod and other elements

The working base of the file must be made of plywood sheet 20 mm thick, which is covered with textolite on top. Along the perimeter it must be edged with planks of hard wood. To lay the tape in the table, it is necessary to provide grooves of small width. As a base, you can use a box measuring 500x720x420 mm. It needs to be glued together from 20 mm plywood. This element will also serve as a place to store sawdust.

Figure 2. Drawing of a homemade band saw: 1 - base, 2 - M6 bolt (2 pcs.), 3 - strip, 4 - nut with washer.

The supporting rod can be made from a channel 680 mm long. Its shelves must be cut to a height of 20 mm. The bar should be secured to the table using a bracket made of metal corner 40x40 mm and several M8 bolts. The belt drive pulleys can be machined from the same 20 mm thick plywood. On the working base they need to be covered with thick rubber, which is butted together. This can be done using a polyurethane adhesive mixture. Once the pulleys are covered with rubber, you will need to impregnate the wooden elements epoxy resin, sand and paint. At the next stage, the working base needs to be given the shape of a barrel, which is necessary so that the tape can be easily held. You will need to glue a duralumin bushing into the upper pulley. A hole for the bearing must be machined in this element.

The lower pulley should be placed on a metal axle and secured with several 5x20 mm screws. The axle must be inserted into a box with several bearings. The structure must be mounted at the lower end of the rod. At the other end of the axle, you will need to fix the driven pulley through the bushing. After installation, you need to balance the belt pulleys. The pulleys are made of duralumin. The operating principle and dimensions of the elements of the tape tension device are shown in the drawing.

Installation of dampers and guide

To eliminate vibrations of the tape, you will need to install a damper. It can be assembled from textolite. The part is secured with M6 bolts at the bottom of the work table. The movable rail makes it possible to select the desired gap. It is worth noting that the saw also has an upper damper. However, it is reasonable to install it only if the upper pulley begins to hit the diameter of the part. In other situations, such a damper will only increase belt friction. If necessary, it can be mounted on a rod using a metal bracket. The part is attached 10.5 cm above the plane of the working surface.

A guide for feeding the plank to be cut can be constructed from a metal corner 100x100 mm. It is recommended to grind its perpendicular planes. In one of the shelves in the extreme parts you need to make several recesses to adjust the gap. A cutout should be made in the middle part to increase the stroke of the rack. Safety during operation can be ensured by a protective cover that covers the entire upper belt pulley assembly. The part to be cut must exit the casing cavity only in the working area.

Installation of the saw band

Particular attention should be paid to the saw blade itself. To do this, you will need to prepare sheet metal. The thickness of the metal should be 0.2-0.4 mm if you plan to saw soft wood. If you need to cut harder types of wood, then the thickness of the metal should be approximately 0.4-0.8 mm. Most people use steel tape measures that are approximately 0.2mm thick and 10mm wide. Automatic devices with curved profile Tapes are not allowed to be used - only old copies will do. The length of the part for the given dimensions of the machine is 160-170 cm. You need to cut teeth on the strip using a file. The pitch of the elements is 3 mm.

At the next stage, the tape will need to be soldered into a ring, and the ends at a length of 4-5 mm will need to be sharpened to a miter thickness. After this, the soldering area should be sprinkled with borax and heated to gas burner. Solder should be applied to the joint, then compress the seam tightly with asbestos-lined pliers. If there are no such pads on the tool, the joint will quickly cool and the metal in the jaw area will become brittle. If necessary, the joint can be sanded.

To get more quality foundation cut, the teeth should be sharpened and slightly spread.

In this case, you can also use blades for branded band-type saws, which are sold in stores. However, the dimensions of the machine will have to be made in advance, taking into account the size of the purchased canvas.

The disadvantage of this option homemade device- small overhang of the canvas. However, it should be understood that this greatly simplifies the design. If such a web overhang is not suitable, then you can increase it. This can be done by changing the location of the support rod and using large diameter pulleys.

It is not easy to build a homemade band saw with your own hands, but if you follow the technology, you can avoid most of the problems during manufacturing.