If you have any hobby, you usually need special tools. Hobbies are different, and accordingly, the amount of technology is also amazing. It can be very complex or as simple as a Soviet nickel. The first, for example, includes band saw on 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 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 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 current repairs. Concern for replacement parts will fade into the background.

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

Saw frame

It is the main load-bearing element of the entire structure. You need to use strong wood - in no case chipboard, 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 structure itself is multi-layered - about six layers for strength. But this is not even counting the additional overlays.

Step-by-step 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 right size for them.

Top 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 secure the profile (preferably hardwood). It consists of a wooden rectangular frame, inside of which a movable holder for the upper wheel shaft is installed.

The corner joints of the frame can be strengthened 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 secured in place with two self-tapping screws. To achieve the mobility you need 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.

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. 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 the same 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, align the wheels so that they form one plane, parallel to the vertical post. 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.

Many tasks can be accomplished using a specialized band saw created by with my own hands. Using the recommendations in this article, reproducing this device is quite simple.

1 - belt drive pulley (lower), 2 - base, 3 - band saw, 4 - V-belt A710, 5 - damper, 6 - guide, 7 - carrier rod, 8 - belt drive pulley (upper), 9 - table ( plywood s20), 10 - electric motor AOL-22-2, 11 - belt drive pulleys, 12 - bracket (steel angle 40x40), 13 - M12 nut (2 pcs.), 14 - upper support, 15 - adjusting screw, 16 - slider

The desktop of a homemade band saw (dimensions 420x720 mm) is made of 20 mm thick plywood covered with textolite on top. It is edged along the perimeter with hardwood slats. To guide the sawing band, narrow grooves are provided in the table. The base is a box measuring 420x720x500 mm, glued together from 20 mm plywood. Among other things, it serves as a place for collecting sawdust.

The supporting rod is a section of channel No. 8, 680 mm long, the flanges of which, for convenience, are cut to a height of 20 mm. The rod is attached to the table using a bracket made from a 40x40 mm angle and four M8 bolts. The saw belt drive pulleys are machined from 20 mm thick plywood. On the working surface they are covered with dense sheet rubber, joined at the edge. Polyurethane glue was used. After rubberizing the pulleys, the wood is impregnated epoxy resin, sanded and painted. Working surface the barrel shape necessary to hold the running saw blade is imparted. A duralumin bushing is glued into the upper pulley with epoxy resin, in which a seat is machined for a ball bearing 60203. The lower pulley is mounted on an axle made of steel type 30KhGSA and secured with three 5x20 screws. The axle is inserted into an axle box with two ball bearings 60203, installed at the lower end of the support rod. At the other end of the axle, the driven pulley of the belt drive is fixed through a spacer bushing. After installation, the belt pulleys are balanced. The principle of operation and dimensions of the parts of the sawing belt tension system are clear from the given figures (section A-A).

Belt Drive Pulley (Upper)

The gear ratio of the belt drive from the engine is i=1, therefore the driving and driven pulleys are the same, with the exception of the mounting hole, which on the driving pulley depends on the motor shaft. The pulleys are made of duralumin. V-belt - A710 (in this design).

To eliminate vibrations of the sawing belt, a damper (vibration absorber) is provided, assembled from textolite parts on M6 bolts. The fixed element of the damper is fixed at the bottom of the work table, and the movable bar allows you to select the required gap. It should be noted that the band saw also has an upper damper, but its installation is advisable if the upper pulley of the saw band begins to “beat the diameter.” Otherwise, the upper damper only increases belt friction. It is similar in design to the main one and, if necessary, is mounted on the rod with M5 bolts using a special bracket 105 mm above the plane of the desktop.

1 - base, 2 - M6 bolt (2 pcs.), 3 - strip, 4 - nut with washer.

The guide for feeding the sawn timber is made of steel angle 100x100 mm. It is advisable to grind its perpendicular planes on a machine. Two grooves are made in one of the shelves along the edges to adjust the gap between the guide and. tape, and in the middle there is a cutout to increase the stroke of the bar. Safety during operation is ensured by a protective casing that covers the entire assembly of the upper pulley of the sawing band, which exits the casing cavity only in the working area.

The saw blade itself deserves a lot of attention. It must be sufficiently elastic, on the one hand, and durable, on the other. For its manufacture, we recommend cold-rolled sheet steel grade U8, U10 or 65G with a thickness of 0.2-0.4 mm for sawing soft wood (balsa, linden) or 0.4-0.8 mm for harder wood. By the way, many people use steel tape measures made of high quality metal 0.2 mm thick and about 10 mm wide. "Automatic" modern roulettes with curved profile tapes are unsuitable - only old samples are suitable. The length of the workpiece for the given dimensions of the machine is 1600-1700 mm. On the blank strip, teeth are cut with a file in increments of about 3 mm, after which the strip is soldered into a ring, the ends at a length of 3-6 mm are sharpened to a miter thickness. Then the place of adhesion is sprinkled with borax and warmed up on gas burner. PSR-40 solder is applied to the joint and the seam is tightly compressed with pliers with asbestos pads on the jaws (otherwise the joint cools quickly and the metal in this area becomes brittle). If necessary, the joint is sanded. To obtain a better cutting surface, the front and back surface The teeth are sharpened similarly to a hacksaw for wood and are slightly set apart. Of course, you can use commercially available blades for branded band saws, but then the dimensions of the machine should be made in advance in accordance with the dimensions of the purchased blade.

The considered homemade band saw is used for straight cutting of soft wood (balsa, linden, aspen, spruce, pine). You can also cut harder woods (beech, oak, mahogany) when installing a 0.8 mm thick belt on the machine.

The disadvantage of this version of a homemade band saw is the small overhang of the blade, but this greatly simplifies the design. If a small overhang of the blade is not satisfactory, then in order for the overhang of the blade to be like that of branded band saws, you will have to make the arrangement of the supporting rod like theirs and use pulleys of a larger diameter.

Technical characteristics of a homemade band saw:
Maximum sawing thickness, mm
soft rocks - up to 100
hard rocks - up to 40
Minimum cutting width, mm - 0.25
Belt drive pulley diameter, mm - 240
Center distance of belt drive pulleys, mm - up to 500
Gear ratio from engine to drive pulley, i - 1
Engine speed, rpm - 2800
Electric motor power, kW - 0.6
Rated voltage, V - 380
Linear speed of the belt, m/s - 35
Tape length, mm - 1600-1700
Sawing speed, m/min - up to 5
Overall dimensions, mm - 720x420x920

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

Introduction

In the workshop, everything should be at hand and the abundance of tools makes the master truly free in choosing 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 blind saw and a special one will do the job, somewhere you need an extremely even saw, and so on.

A DIY wood band saw deserves pride of place in the workshop. Not everyone has it, however, the ease of its use is undeniable. Its advantages include the following features:

1. High cutting quality, as there is no return movement of the cutting blade.
2. High sawing speed, as the cutting band moves at high speed.
3. High maneuverability when sawing due to the small thickness of the cutting blade.
4. High versatility and flexibility of tool use.
5. High operational safety.

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

1. This is a stationary saw, so there is no possibility of its mobile movement.
2. Limited sawing area due to design features.
3. Large dimensions.

Making a band saw

Preparing for work

When starting work, 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.

Tools:

Basic tool	Descriptionoperation	Alternative tool
	Performing longitudinal cutting of workpieces	Band saw with the ability to cut parts over half a meter in length. Jigsaw. The disadvantage of a jigsaw is the low quality of the saw.
	Sawing out a niche, groove and top bolt. Making pulleys.	Band saw. Hand 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 using a carpenter's vice or some heavy object as a press.
Drilling machine (+)	Drilling holes	Hand-held electric drill. What’s worse is that it does not guarantee the correct geometry of the holes. The process of drilling with a drill is more labor-intensive.
	Sanding the surface of workpieces and edges	Hand electric drill with grinding attachments. It may be difficult to sand at a 90 degree angle. . The problems are the same as hand electric drill. It also adds limited power to the tool.

Materials, fittings, fasteners

• 15 mm thick;
• Solid wood block;
• Bolts for horizontal and vertical adjustment;
• PVA carpentry glue;
• Wing for adjustment bolts;
• Insulating tape;
• Bearings for the upper axle;
• Two bearings for the drive axle;
• Two shafts;
• Cutting blade;
• Two bushings with internal thread;
• Self-tapping screws, nuts, washers, fittings, studs;
• Tapes or attachments for or.

Main structural elements

The band saw drawing will include the following components:

• Base;
• Tape tension mechanism;
• Pulleys;
• Saw blade (cutting tape).

Manufacturing of structural elements

The manufacturing instructions will be divided into 5 points and include steps to produce a homemade bandsaw. The article provides photo and video materials that will help you not make mistakes during production.

Base

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

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

• With help you need necessary details, as well as the adjustment groove for the upper pulley, then drill a hole for the lower drive shaft.

• Next, you need to assemble the future foundation. For assembly, use PVA glue or any other wood glue. We apply it in an even layer on all the surfaces to be glued, then we apply the parts to each other, avoiding inaccuracy. Fixation of products must be done with clamps, since for high-quality gluing, a tight fit of the workpieces is necessary. It is necessary to wait a day until the glue dries completely.

• We install bearings for the lower drive shaft.

Saw blade (band) tension mechanism

• To make a tensioning mechanism for a band saw, you need to make a block, the dimensions of which will correspond to the niche in the saw body. A hole is drilled at the end of the block for the pin and fitting. Sockets for bearings are cut out on both sides.

• We insert the pin and secure it in the block. It should stay firmly in the hole. To increase the strength of the fastening, before inserting the pin, apply PVA glue to its surface, and you also need to additionally secure the pin with a self-tapping screw or screw.

• 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 base glue dries, we begin to manufacture the moving elements, namely the pulleys. The entire process of their manufacture is reflected in the photographs provided.

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

• Even the most precise and careful sawing will not give the workpiece perfectly correct shapes, so it is necessary to grind the ends. To do this, it will be used with a table at 90 degrees relative to the plane being processed. If you don't have suitable tool, it is possible to grind the edge using a manual grinder or homemade device for with a grinding attachment. The workpiece is fixed with a bolt or self-tapping screw to a certain base. Thus, when it is fed to the grinding wheel and rotated around its axis, a perfectly smooth circle 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 inner tubes.

Sawing table will be 15 cm wide. It will be installed on a special end face of the base of the machine between the pulleys. You need to make a cut in the table for free movement of the saw blade. The dimensions of the table being manufactured depend on the needs and preferences of the craftsman. 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 work. As always, in life you need to choose the “golden mean”, so the final decision is up to 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 type, size, type of steel used, hardening of the material, shape of the teeth, their setting, etc.

Below is a table with some parameters of saw blades.

International marking	Decoding	Body hardness	Teeth hardness	Application Feature
Constant hardness	with equal hardness over the entire area	45 - 48 units. HRc	45-48 units HRc	This type is used on small diameter pulleys.
Flex back - Hard Edge	With high performance hard teeth but flexible body	30-33 units HRc	63-65 units HRc	The upper part of the tooth is hardened, while the rest of the product is flexible. Capable of handling larger feeds compared to the previous type.
Hard Back	blades hardened over the entire area	48-53 units HRc	63-68 units. HRc	The saw band production technology is the most modern and is used in industry. Capable of performing a larger volume of work, but the price is significantly higher. The canvas is used in professional machines.

In addition, band saws differ in tooth size:

• with small tooth
• with middle tooth
• with large teeth

The greater the hardness of the tape, the greater its resistance to dulling. The rigid blade allows you to cut material at high feed rates without reducing performance characteristics work.

IN in this case For our band saw, the optimal option was to choose a blade 1065 mm long made of carbon steel, marked Constant Hardness.

Assembly

• Processing the base. After the glue has completely dried, you need to remove the clamps and treat the gluing area, ends and other surfaces.
• Installation of the saw blade tension mechanism. It is installed in the mounting groove, and a thrust element must be placed on top. During operation, the mechanism must be firmly fixed.

• Installation of pulleys. It is necessary to pay attention to the fact that the installed pulleys must be parallel to each other and rotate easily around their axis, while the axis must be absolutely static. Strong beating of the wheels is not allowed, as this can lead to the saw blade slipping off the pulley and injuring the operator. The lower drive shaft must go all the way through the housing and have a sufficient end on the reverse side so that it can be clamped into the drill chuck. The upper pulley is installed in the saw blade tension mechanism.

• Installation of the cutting blade. The saw blade should be installed over the ends of the pulleys. First, it should fit freely onto this structure, and by rotating the adjustment knob, the block with the axis of the upper pulley moves upward, thus increasing the distance between the centers of the pulleys. In this case, the tape is tensioned. After tensioning, you need to tighten the screw in the fitting to firmly fix the tension mechanism.

• Installation of the saw table. The saw table is located on horizontal surface base as shown in the photo. Its area should be sufficient for a comfortable process of sawing the workpiece. It should be noted that the perpendicularity of the table to the saw blade is very important, and in two dimensions - longitudinal and transverse. The table is fastened with self-tapping screws. Although there is an option to “plant” it with glue, and install dowels for strength.
• Installation of power tools. Actually last stage we need to make this design come to life. To do this, you need to clamp the shank of the drive shaft of the lower pulley into the drill chuck. Alternatively, you can use a hammer drill or. But the power will be clearly insufficient, so still use a drill or hammer drill.

• Setting up and commissioning. Before you begin, turn on the band saw to idling. Make sure that the tape does not slip and runs smoothly. Check its tension and fixation of the saw blade tension mechanism.

Rules for working on a band saw

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 mounted on a band saw with large teeth; It is better to use universal type cutting belts. This way there will be no need to change the blade when processing different materials;
• Decide on the installation location of the machine and securely mount 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 sawing band and, accordingly, tighten it only before work. This will extend the period beneficial use canvases
• Every two hours of operation, turn off the band saw and let the engine run in this example drill, relax, and at the same time check for malfunctions. Compliance with this rule will protect the worker from injury and the tool from overheating.
• Check the set of 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 belt from time to time and monitor the condition of the main parts.

Video

Video this review is based on:

Any owner of a private home wants to have various equipment. This makes it a lot easier for him necessary work. If you need to deal with wood products, the work will become easier when you have the required device. A DIY band saw is actually easy to do, the main thing is to use the drawings, as well as the advice of various professionals.

They are 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 an electric motor attached to a frame, and a blade is attached to the former for cutting the material. The device will not work without a motor. The blade can be different, thanks to which both wood and metals and even polypropylene are cut.

Homemade band saw

Pros and cons

It must be said that making a band saw with your own hands is simple and quick, but it is recommended to find out in advance about all its advantages and disadvantages.

• Works at high speed.
• Very accurate.
• Very productive.
• Low thermal conductivity.
• You can set individual parameters for workpieces.
• Bends can be either straight or curved.
• You don't need a lot of money to assemble the device.
• After the tape has been worked, a cut remains, the width of which is small. Therefore, there will be little waste. This is very big advantage when wooden products are produced.

• The 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.
• Must use special equipment for the production of saws.

When you make band saws yourself, it is useful to know that the materials can be found at home. But you can’t do without canvas, so you should go to the store to buy 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 bimetallic blade can cut stainless steel and alloys.
• Tooling - appropriate steel is used. Needed for simple materials. They are used by small workshops.
• Carbide. Used for complex alloys.

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

• Toothless. Very productive, often used for metal. There are teeth, but small. The operating principle is based on friction, as well as additional heating.
• Serrated. This is how plastic and wood are cut. The canvas is closed.
• Electrical search. Suitable for enterprises with large volumes of processed products.

Teeth selection table

Materials and various tools

There are many available tools to make the device. If a person is planning to make a band saw with his own hands, then he should stock up on the following items:

• Bushings.
• Electric motor.
• Polyurethane glue - connects parts.
• Fasteners such as bolts and screws.
• The rod is steel, as well as the channel. Required to make the axle and frame.
• Rubber - sheet type. It protects the wood.
• Belt - for wheels.
• Sheet steel. The cutting blade is made from it.
• Wooden shield (plywood or chipboard can be used). Needed for the frame with the cabinet, and also a pulley.

Tools:

• Welding machine.
• Bulgarian.
• Hammer.
• Screwdrivers.
• Machines – cutting, grinding, welding.

The production of the device occurs not in one stage, but in several. If a person makes such a unit as a band saw with his own hands, drawings are the main thing; you can’t do without them:

Band saw drawing

• First they build a table, and then a cabinet. A wooden shield is used for this. After all, this is a device for fastening the mechanism itself.
• They take plywood, make pulleys, and cover them with sheet rubber.
• All elements made of wood are sanded, and epoxy resin is used to coat the top.
• Next, to assemble the device, a frame is made. It resembles the letter "C". Therefore, the tape holds well. To make it, take a channel. And they put a steel axle 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 feed itself, a special mechanism is made using metal corners.

It is important to know that before testing the tape, you need to prepare it. First of all, the location of the cutting belt is checked. Only a right angle is strictly defined for it. The machine cannot be distorted, otherwise it will pose a danger to humans.

Secondly, it is necessary to properly tension the cutting band. To adjust, use a driven pulley. Do-it-yourself welding of band saws, which is mandatory for production, is quite easy to do.

It’s not news to anyone that any equipment needs to be inspected from time to time and, if necessary, repaired. For a saw, the main thing is to sharpen it correctly. So , Do-it-yourself band saw sharpening is not as scary and difficult as it seems. It is enough to do the following:

• First, the initial sharpening is done. That is, they consider the symmetry, establish it, inspect the teeth, if there are cracks, they must be eliminated.
• Further, there will still be some sawdust on the canvas, as well as sawdust. It needs to be cleared of this debris.
• To restore the corners, they perform wiring.
• They do the final sharpening. It is designed to eliminate all existing distortions and also make the teeth sharper.

Sharpening rules

If a person has not done such work before, then he must be very careful. Otherwise work of this device will be of poor quality. If a person is not sure that he can carry out such activities himself, it is best for him to call specialists who understand sharpening.

Emerging problems

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

• Firstly, the equipment used for manufacturing is not very simple. After all, you need to be able to use the welding machine correctly.
• Besides, milling machine Not everyone has it.
• Secondly, you need to monitor the stability of the structure. We must not forget about the mass of the material being processed.
• Thirdly, not every person will understand the drawings.
• It is necessary to take into account that the cut of the device will be wide.

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

Using the woodworking machine

Let's say you made a car, but now you need to use it the right way. The thing is that when using a homemade band saw on wood, all safety rules must be taken into account. Sometimes the blade breaks, 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 universal tape. Then there will be no need to change the canvas.

Before making the device, you need to think about where it will be located. They consider not only the room, but also whether it has electricity and ventilation.

Before working, you need to tighten the tape as tightly as possible. If this is not done, the machine will not work well and may also be dangerous.

Do not operate the device for more than 2 hours. Then you need to remove the tape and not touch it for a day. After the machine has been operating for a very long time, it must be lubricated. It is necessary to ensure that the teeth are set correctly.

Here, in fact, are 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 operation of the device, the best thing to do is turn it off, look, and check it. You need to be very careful.

Making a saw yourself is a painstaking and complex, but completely doable task. The easiest way to assemble a homemade band saw is to wooden frame– you don’t have to cook anything, and almost everyone has carpentry tools.

For the frame, it is better to choose strong and solid wood, otherwise the structure will be unreliable and will vibrate. Some elements, such as a desktop, can be made of plywood, and the ribs are edged with slats for rigidity. Most cheap option– disassemble old furniture, putting plywood on the pulleys and table. A maple beam is suitable for the supporting rod.

First of all, you need to decide on the drawings, according to which the frame will be assembled in the future. So, the size of the band saw itself will depend on the height of the working room. It is necessary to think in advance about the convenient height of the table, the length of the rod and the diameter of the pulleys. The drawings can be either conditional, reflecting only general dimensions, or detailed, as in the photo.

Installation of rod and pulley supports

The simplest do-it-yourself band saw is on a wooden C-shaped frame, where the support rod is made of timber at least 8x8 cm thick, to which two supports are attached to one (relatively rear) part.

The pulleys will be held on them. It is better to make such supports from strong material; multilayer plywood with a durable core is acceptable.

The distance between the supports must be selected so that the logs needed for sawing fit there. In any case, it is recommended to make the distance “with a margin” so that there are no problems in the future.

Assembling the desktop

The height of the table should be comfortable for working on it, and at the same time accommodate the lower pulley and drive pulley, motor and large number shavings. The shape itself can be anything, but it is often made in the form of a closed cabinet that serves as a container for sawdust.

It is advisable to provide a simple way to open the table and a waste tray - this will make cleaning the saw much more convenient.

Cutting pulleys and attaching them to supports

The diameter of the belt drive pulleys can be chosen arbitrarily, but the larger the pulley, the longer and better the saw works. In this case, you need to select the blades correctly, the ideal ratio is 1/1000 of the blade to the pulley diameter. Thus, for forty-centimeter pulleys, the tape should be 4 mm. But when correct operation Even on narrow pulleys you can safely work with 6 mm blades.

The diameter of the belt drive pulley must be selected depending on the diameter of the main pulleys, belt length and engine speed.

1. Calculate the circumference of the saw pulley: D = 3.14 * pulley diameter.
2. On average, the speed of the web should be 30 m/sec.
3. The number of revolutions is determined: O = 30/D;
4. The ratio (C) of the motor revolutions (RM) to the revolutions of the belt drive pulley is calculated: C = RM/R;
5. Drive pulley diameter = D/S.

The diameter is chosen one or two sizes smaller than the pulley. This rubber cover prevents the fabric from slipping.

The upper pulley is mounted on a movable block, which must move horizontally, ensuring belt tension.

For this purpose, a special lifting mechanism. The simplest option is a beam located under the block and attached to the lever with a very tight spring. By pressing the lever, the beam raises the block with the pulley, providing the required tension.

It is necessary to provide a way to secure the lever in a given position, for example, with several bolts located on different levels. The spring will provide the necessary pressure and at the same time will relieve tension, preventing the tape from breaking.

It is important to properly balance the upper and lower pulleys in the same plane, minimizing the “eights” when the wheels move.

To attach the upper pulley, it is convenient to use self-aligning bearings, which will allow you to quickly remove and put on the wheels.

But they need to be attached to the pulleys as tightly as possible, otherwise the bearings will become loose very quickly. After securing the wheels to the frame, you should trial run saws using maximum caution.

Installation of blade guides

To ensure that the wood band saw makes an even cut and the blade is not “pressed” by the wood being cut, guides are mounted along the blunt end of the saw on a narrow beam.

The simplest option is to screw three roller bearings to the beam. The flat side of the canvas rests on one, the other two hold the tape tightly on the sides.

It is imperative to perfectly align the guides at the attachment point on the support, otherwise even a microscopic vertical deviation can result in 3 mm at the opposite end. It is best to mark the position of the beam with the canvas stretched to the maximum and the guides already installed. This guarantees their exact position relative to the saw blade.

Instead of two bearings on the sides, you can make wooden stops. It would also be a good idea to install additional guides under the tabletop, and not just on top.

It should be taken into account that the guides should be as close to the workpiece as possible, ideally at a distance of 3-4 cm from the log. Therefore, if you plan to saw workpieces of different thicknesses, it makes sense to adjust the height of the guides.

Final finishing

This is not so much for aesthetic purposes as it is for safety - even if the tape slips off the pulley, it will remain in the casing.

It is better to take the belt drive out from under the table so that sawdust does not fall on it. To protect the engine, it is also recommended to install a casing to prevent the penetration of dust and other particles.

Final treatment of the wood with varnish or paint will not only extend its service life, but also protect your hands from unpleasant rolling pins and splinters of untreated wood. First, all surfaces must be sanded and treated with antiseptics to prevent rotting.

The video provides an overview of a homemade wooden saw and explains the advantages of this solution: