Band saws for wood
The prudent owner always has a set of various tools, with the help of which he can make repairs of any complexity, as well as independently build the necessary object. Such devices include band saws. They are multi-cutting cutting tools designed for band saws and hand band saws. Outwardly, such a saw is a flexible, closed in a ring, made of steel. On one edge of it there are cutting teeth.
The blade is assembled on special pulleys at the top and bottom. The rotation is achieved through the work of an electric motor, it drives the entire mechanism. Any sawmill has such machines in its arsenal, with the help of which you can saw round timber into finished sawn material of the required thickness. For home use, it is reasonable to buy handheld versions of the tools for sawing wood, which are compact in size. Battery-powered models are available, allowing you to work in hard-to-reach places where there is no way to connect to the mains.
When assembling the frame of the band saw, it is better to give preference to hard and strong wood species. Otherwise, the final construction will not have the necessary stiffness and will create vibrations. The individual elements, including the work table, are made of hard plywood and the ribs are additionally reinforced with slats. The most affordable option is to dismantle old furniture.
The first thing to do at home is to make drawings, on the basis of which the assembly of the frame will be performed. They are created taking into account the height of the working room and the physiological characteristics of the person who will work at the saw.
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The top roller must be movably mounted for belt tensioning. For this, a frame with an adapter plate sliding on pins is welded. It is welded with a roller installed at the top of the 50×50 mm post.
The vertical tube of the welded frame is used as a guide for the 15×15 mm pipe. To fix the latter, you will need to bore and weld in the nuts for screwing in the clamping bolts.
Next, 2 belt catchers must be made. To do this, 2 angles are cut from a piece of large profile pipe.
At the short edge, a wide open slit is made in them. On the opposite half, a long inside hollow-cut is milled. An axle with a bearing is welded into the first one. On the same half of the angle on the outside are screwed bearings, as in the photo.
One strap catcher is bolted at the end to a 15×15 mm sliding tube. The second one is fastened to the frame at the bottom near the first roller connected to the motor.
To match the size of the frame, a table is cut out of chipboard or plywood. It is screwed to the frame through the piano hinge. A parallel stop is fastened to the table and a piece of profile tube is inserted into the kerf on the tabletop for band entry.
To be able to adjust the angle of inclination of the table, you need to make a sliding support under it. For this purpose, a strip with a longitudinal notch is prepared. It is attached to the table top from the opposite edge of the hinge with a mounting bracket. Opposite the band on the bed a nut is welded to press the prop with a bolt in the right position.
Then the machine is painted, the motor is connected to the power supply, the power button is installed. Before start-up the saw blade tension is adjusted by shifting the upper roller, and the position of the catches.
Assembling a bandsaw with your own hands
Homemade band saw in the home workshop
First, the band saw assembly with their own hands is not an easy task. you will have to engage a lot of attention, laboriousness and time, but there is no way to do without it, so for those looking for easy ways, it just can’t be done. Secondly, you will need spare parts for the self-made machine, which can be purchased offline or online, so you will have to spend some part of the family budget in any case. And finally, thirdly, such a machine is needed for a home sawmill and if there is a serious need, the first two points will not be a stumbling block for you.
Drawings and preparations
Drawing for band saw with dimensions in mm
- The pulley under the work table.
- Band Saw.
- A trapezoidal belt with working sides (V-belt).
- Damper to dampen machine vibrations during operation.
- Guide for workpiece.
- Pulley above the work table.
- Working table.
- Electric motor.
- Pulleys with belt drive on the motor.
- Anchor for stiffness.
- A device for the adjusting screw.
- Support for boom.
- Adjusting screw.
You surely understand that to make a band saw for wood with your own hands in any case you will need drawings, which you can calculate yourself, or find ready-made on the Net. Above you see one of the options for such designs with the size in millimeters, but their observance is not mandatory, and you can always change them observing the scale with respect to the original, for example, 1:1,2, then the height of the table will get 5001.2 = 600 mm, and its total depth 4281.2 = 513.6≈514 mm. It is quite natural that this will increase the diameter of pulleys, the width of the blade and install a more powerful motor, although, as a rule, such units use engines at 2.5-3 kW.
Wood-cutting band saw
Here are the workpieces for assembling the machine to be purchased:
- wood-cutting band saw;
- Electric motor 2.5-3 kW, 1200 rpm or more, preferably ≈220 V;
- channel, steel angles, profiled pipes of round, rectangular or square cross-section;
- steel plate for the work table;
- pulleys (can be removed from decommissioned agricultural machinery). optimal Ø300 mm;
- Plywood (preferably FSF or FBS), chipboard, OSB (OSB-3);
- Self-tapping screws (preferably with anti-corrosion coating);
If we talk about working tools, in this case you will need:
- electric welding (direct or alternating current);
- angle grinder with a metal cutting disk;
- a hand-held circular saw and/or an electric jigsaw;
- electric or cordless drill with a set of drills and nozzles;
- locksmith’s hammer;
- a small level (400-600 mm);
- Construction angle, tape measure, pencil, pencil marker, marker.
First of all, for such a unit should be welded to a frame of 100-millimeter channel or a profiled tube with a similar cross section, based on a pre-prepared drawing. The height of such a construction should be at least 1500 mm, because it will serve to attach pulleys and other parts. If you wish, you may assemble a wooden box at the bottom, where the sawdust will fall, for this purpose you may use any piece of lumber. Here are some more drawings of some units, where you can discern the details.
Textolite damper (5): 1) base; 2) threaded bolts M6; 3) bar; 4) nut with steel washer Workpiece guide (6) Carrying rod separately from machine (7) Geometry of the upper pulley (8)
to the drawings. The numbers in the captions (given in parentheses) indicate the part number in the general drawing above the others.
Let’s proceed to assembly
Both homemade and factory-made machine of this type provides in its scheme a frame to which all the necessary parts are fixed, which include an electric motor to rotate the pulley and an adjustable guide to feed blanks in the form of a log, beam, plank, etc. You will also need a pair of pulleys that are fastened to the frame with guide pipes, and it is better not to use welding here. the fastening must be collapsible, that is bolted. To prevent the cutting belt from falling off during operation, it is installed with a slight tilt and projection of the edges. these measures will also ensure the self-tensioning of the blade during operation.
The belt tensioning device: 14) support; 15) adjustment screw; 16) slider; 17) protective cover; 18) screw with M4 thread; 19) bearing 60203; 20) oil seal; 21) washer; 22) washer The belt tensioning assembly: 1) bottom pulley; 4) trapezoidal belt; 7) support rod; 11) pulleys; 19) bearing 60203; 23) washer; 24) stopper with M6 thread; 25) spacer bushing; 27) cover; 28) shaft Bucket for saw unit (dimensions in mm) Drive shaft
Since the machine can only be made by attaching all the parts to the frame, it must already be ready, so it was mentioned first of all in the “Drawings and Preparation” section. After the electric motor has been installed, the pulleys are connected to it by means of a belt or chain transmission. After that the control panel is assembled, which consists only of two buttons. “start” and “stop”. It can be fixed on the frame leg, on the wall or it can be hung on a hook. In fact, the assembly of the machine ends there, you just have to adjust the fastening of some parts, but this will become clearer during operation.
Setting up the band saw system
Efficient and high-quality operation of the joinery depends directly on the setting of the equipment. There is a scheme of adjusting the installation. First install the wheels parallel to each other. Next, install fluoroplastic washers, which are necessary to prevent vertical displacement.
Handmade universal band saw made of wood p.1
The first start-up is performed without guides. At this stage they check the smooth start and cleanliness of the motor, and then they make a test cut with the blade, but with minimum loads. For work with increased load use a unit with guiding belts. Such a construction consists of two halves, which are installed along the line of the cutting blade.
In the past, craftsmen with their own hands made not only machines, but also the cutting blade. Closing the belt unit into a ring is difficult on your own and requires some initial experience in machine assembly. Manual sharpening is also done using a template. You can do all this by yourself and save money, but today’s market is jam-packed with all kinds of gadgets and details that improve the quality of material processing or make the machine multifunctional. The main thing in this case. remember about safety, because production models or homemade ones pose a great danger to human health.
Recommendations for installing a roller unit for a machine tool
The self-made band saw for wood will work properly and without failures when using hardened rollers. The assembly in which they are included is best made by yourself. In this case, you can be sure of its reliability, which can not be said about the ready-made mechanism. The design of this assembly has the following features:
- there are three bearings in the mechanism. Two of them are grade 202, the third is a little larger;
- the shaft and rollers are made to accommodate the different saw widths. If necessary, a washer is placed between the bearings;
- The shaft enters two tubes, one inside the other, with a slight offset of the axis;
- the roller unit is mounted on the homemade machine with the possibility of height adjustment or lateral displacement.
How to use a band saw for wood?
This device helps quickly and accurately make any cuts on wooden products. Practice and care is required when working with this type of tool, knowing how to use band saws for woodworking machines will make the result worth the effort.
- Correctly choose the type of band saw, paying attention to power, speed, blade length, the parameters of the working surface of the table, electrical characteristics.
- The saw blade needs to be adjusted for each project individually, considering its width, thickness and tooth pitch.
- Before the work it is necessary to check movement of working blade and to make adjustment of guides.
- Working surface must be adjusted to the necessary angle of inclination.
- On wooden workpieces before working, it is necessary to make a marking.
- The saw can be turned on and waited for it to pick up speed.
- Guiding the workpiece along the guides, make a cut.
Setting up a band saw for wood
Every power tool needs daily maintenance. Taking a few minutes before work to set up and adjust the band saw for wood is necessary. By performing simple manipulations, you can increase the life of the tool many times over.
- Disconnect the saw from the power supply and remove the working blade.
- Clean debris from the rails.
- Pulleys free of dirt, vacuum the inside of the shrouds.
- Reinstall the blade and tension the blade.
- Align the sheaves so they are parallel and in line with one another.
- Check the working canvas and make final adjustments if necessary.
- Check the position of the bearings.
- Make sure the tabletop is at the proper angle to the blade.
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Difficulties in making the machine yourself
The design of a band saw is quite complex. The quality of the assembly depends on the performance of the band saw, its service life without damage and much more. You should start making your own machine after considering the points below: