Homemade machines from a sewing machine. DIY jigsaw from a sewing machine. Making a homemade jigsaw

The idea of making a jigsaw came to me many years ago, but I brought it to life much later - when someone discarded a faulty sewing machine produced by the Podolsk plant fell into my hands.
From the “insides” of the machine, I took only the main shaft and the “needle bar” assembly, and dismantled the remaining parts. I also cut off the front part of the platform, leaving only the thrust bearing under the L-shaped body stand. I sanded down all the tides on bottom surface. I drilled holes in the corners of the thrust bearing and through them I attached the inverted machine to the tabletop of the cabinet from below. By the way, I also used the cabinet from an old footstool sewing machine True, finding such a cabinet is perhaps more difficult than the machine itself, but it is not difficult to make it from a 20 mm thick chipboard. Close the lid on top steel sheet 1.5 mm thick (can also be made of duralumin).

A pulley with a diameter of 80 mm for a V-belt drive was installed on the protruding end of the main shaft (you can also take it from an old foot sewing machine, you just need to bore it for a V-belt). A similar pulley, but with a larger diameter (100 mm), was installed on the electric motor shaft. Electric motor - single-phase (220 B) with a power of 180 W and a speed of 1350 per minute, together with a pulley, used from an old washing machine
The electric motor was mounted on the lower platform of the stand, which was made from fairly strong bakelite plywood 20 mm thick, since there was no floor in the stand itself. In the platform, I previously cut out oblong grooves through the holes in the legs of the electric motor to move the motor in order to tension the drive belt. The sawing unit is difficult to manufacture and requires some experience in working with metal. But it does not require precision (particularly precise) execution, so its parts, right down to the saw, can also be made by yourself.

The sawing unit is shown in the figure. A mandrel with a slot made of a hexagon is put on the needle bar, which is fixed with locking screws. A file is inserted into the slot of the mandrel, onto the shoulders of which a washer with a slot-like hole and a groove is first put on. The washer with its groove rests on the shoulders of the file. Then the union nut is put on and carefully tightened so that during operation the file did not break, a thrust roller assembly is provided. To do this, a hole measuring 65 × 13 mm is sawed in the lid. Above this hole, a plate is symmetrically attached to the cover with countersunk screws. Below it, a roller holder is installed. It is fixed with countersunk screws and a plate with two threaded holes. A roller made of steel is installed in the slot of the roller holder and secured with a rivet-axis with a diameter of 3 mm. The plate must be installed flush with the surface of the lid, so you need to select a recess for the plate with a chisel.

The file is made of carbon steel, if there is no purchased one. The teeth are cut with a small file and needle files of the same shape as for longitudinal hacksaws. The teeth should have a set, but since they are very small, use them for this purpose special tool almost impossible. Therefore, the saw blade must be clamped in a small vice, then light bending blows should be applied through the tooth with a beard and a hammer. Then the file is turned over and the remaining teeth are bent in the same way. After sharpening, the teeth must be hardened.

It is more convenient and more productive to work with such a stationary jigsaw than with a manual electric jigsaw, especially with small workpieces. And the quality, in my opinion, is much higher.

Jigsaw diagram and drawings

The video shows a jigsaw from an old sewing machine in action

Well, another option for creating a jigsaw

We independently convert an old sewing machine into a jigsaw.

There are many videos on the Internet about using old sewing machines in a new way. To do this, we leave in the body only the crank, the vertical rod for attaching the needle, and the flywheel with a groove for the belt drive. An electric drive for manual sewing machines is used to rotate the flywheel. (A lyrical digression is off topic: I purchased the drive about 30 years ago to make an electric spinning wheel according to drawings from the magazine “ Young technician" Wool from a white sheep was spun on a spinning wheel and a winter sweater was knitted. The spinning wheel itself was successfully played by someone I knew, that is, it disappeared). The foot pedal for speed control and the electric motor are pictured below.

A review of net rollers recommends the use of leaf springs with the force application point in the center of the long spring or a coil spring unit with precise fixation of the bottom edge of the file. A long leaf spring significantly increases the overall dimensions of the device. The coil spring unit is difficult to make at home. The chosen scheme is a short spring fixed at one end.

A piece of an old metal meter worked perfectly for this. The spring stiffness can be adjusted by setting the number (stack) of springs and moving the clamp along the spring. Using a short spring complicates the attachment of the file, since the free end of the spring describes a curved line, and accordingly the lower end of the file will also not move strictly vertically.

Available round hole in the spring it is bored out with a file to make a rectangular hole according to the size of the file mounting unit. The result was a unit swinging along the long axis of the spring. Fixing the unit from below with a piece of rod. Fastening the file with a screw. When changing a file, the unit does not fall out because the saw clamp screw at the top and the axis of rotation at the bottom do not allow it to move at a small angle.

Making the attachment point for the upper end of the file is not difficult and is clear from the photo.

The next feature of using sewing machines for making jigsaws is the small stroke of the working rod - approximately 25 mm. For reference: the working part of purchased files is approximately 85 mm with a total length of files of 120 mm. This shortcoming can be eliminated. To do this, the machine body is installed through a gasket (I have a thickness of 45 mm - three plates furniture chipboard,) Under the working rod there are three 15 mm spacers. As the working part of the file wears out, one gasket is removed, and so on.

When using homemade saws (notching saw teeth on piano wire with a diameter of 1 mm over a length of about 30 mm), it is not necessary to remove the gaskets. Since the machine is quite old and worn out, that is, it rumbles, and to eliminate noise, rubber shock absorbers are attached to the base posts. The first work was made of good quality 3mm plywood.

The works are small in size. Machine length 22 cm. Puzzles approximately 8 cm.

Desktop jigsaw machine Designed for sawing various parts with complex configurations from sheet materials. This tool is capable of working with MDF, chipboard, fiberboard and many others. Jigsaws can also cut out the internal contours of parts if you first make a small hole. This tool is different wide range applications, since it is capable of providing high performance labor, which cannot be achieved with a regular hacksaw.

Design features

The design diagrams of all jigsaw machines are usually the same. Having carefully examined the drawings showing this tool, you can see the following structural components:

the bed, which is also often called the body. It is designed to accommodate everyone structural elements unit;
drive mechanism;
crank mechanism. It is necessary to convert the rotational energy of the motor shaft into the movements of the saw used during operation;
double rocker arm. Equipped with fasteners for a file and a tension device;
desktop In some modern models it has a rotation mechanism that moves at a given angle.

How to make a machine from a jigsaw?

To make a jigsaw from a manual jigsaw, you need to follow these instructions:

First you need to make a table where a homemade jigsaw will be installed in the future. For this purpose use any durable sheet material– thick plywood, metal and others.
They do it in the table through holes, intended for cutting blade and various fasteners.
The resulting jigsaw table is installed and securely fastened to a suitable wooden table.
The resulting table is equipped with guide rails.
Fixed at the bottom manual jigsaw, which allows you to replace the drive mechanism of the machine and many of its other structural elements.

Anyone can make such a jigsaw machine with their own hands. Its advantage is that at any time this unit can be quickly disassembled and only hand tools can be used.

Homemade jigsaw table-machine from a manual jigsaw

How to make a more professional instrument?

A homemade jigsaw machine can have all the qualities that are present in professional equipment. To make it you need to follow these instructions:

The frame is made from any durable material - 12 mm plywood, plastic, textolite and others. It should consist of a base, a housing to accommodate all structural units and a work table.
On the other side, a rocking chair with an eccentric is placed. They need to be connected to each other using metal plates with sleeve type bearings. The resulting structure is installed using screws.
The intermediate shaft is formed from several bearings.
The metal pulley is placed very tightly on the shaft and the screw connection is secured.
To change the movement characteristics of the rocker, 4 round holes with threads are made on the eccentric flange. They should be placed at different distances from the center line. The amplitude of movement of the rocking chair is regulated by the location of the screws.
The rocking chair is formed from wooden rocker arms, which are attached on a hinge to the stand.
Small cuts are made at the rear ends of the rocker arms. They are designed to install tension screws.
The front ends of the rocker arm are designed for mounting a saw blade. It moves using special metal hinges. Before attaching the file, it is installed in a groove located on the work table.
The rocking stand is made from a single piece of durable material. A groove is made at its upper end for installing the rocker arm, and a small hole is cut out near the lower end rectangular shape for mounting the second rocker arm.

How to make a machine from a sewing machine?

A sewing machine makes an excellent jigsaw, which is equipped with a saw blade movement regulator. It is not difficult to do if you follow these instructions:

The thread weaving mechanism is removed from the bottom of the machine. On some models it may be located in a different location.
To dismantle this unit, you need to remove several bolts, then remove the cotter pin and drive shaft.
The top protective panel is unscrewed. After this, the groove along which the sewing needle moves must be expanded to suit the parameters of the file.
The cutting element itself is also slightly modified. It is trimmed according to the length of the sewing needle.
It is not necessary to make an adapter to install the cutting element. Instead, you can grind down the upper incisors a little and process the lower zone of the blade.
The file is inserted into the needle holder and work begins.

All presented options for manufacturing jigsaw machines are very successful. The resulting units are distinguished by high labor productivity, and making them is not at all difficult. Depending on their skills, each master will be able to choose best model homemade equipment.

Video: Jigsaw from a sewing machine

For a person who is used to on our own cope with everyday problems, a jigsaw is a necessity. Electric jigsaws are also good for those who like to tinker, for those who live in their own home, and for summer residents. You can make a jigsaw with your own hands, since this model differs significantly in better side from hand tools. An electric tool improves the quality of sawn products, and also facilitates and speeds up the work process.

Types and purpose

A jigsaw is a thin saw that additionally has a ski to guide the saw blade along the surface. The jigsaw was invented by Albert Kaufman, who at first simply replaced the needle with a blade. sewing machine with foot or electric drive. A modern jigsaw has simple design in the form electric motor and setting the blade in motion simple mechanism. Front, upper part The tool has a guide, and the lower one contains a retractable saw blade that makes cuts. U electric jigsaw There is a support platform that allows you to focus on the part being cut and work with great precision.

A jigsaw can cut through plastic, plywood, copper, brass or steel with equal success. The functions of a jigsaw should allow it to make both straight and curved cuts on various types of materials without disturbing the external contour of the product. The fixed position of the tool allows you to make cuts high precision. Hand jigsaws do not have a tension system and guides, thanks to which a jigsaw has such a smooth and stable move.

A manual jigsaw is inconvenient for cutting out small parts. Since it is quite heavy, you have to hold it with one hand while guiding the workpiece with the other. A tabletop jigsaw does not have this drawback, but it is difficult to process large parts with it, and it is quite large in size. It is best to use such a jigsaw as a mini-machine for the production of small workpieces. simplest table jigsaw easy to make with your own hands.

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Manufacturing

The simplest model can be produced quite quickly, but its availability is usually sufficient for household needs. A carefully made jigsaw will be no worse than one made in a factory, and in some ways it may be able to surpass it. In order to make a jigsaw, you will need:

manual jigsaw;
heating thread;
screws;
plywood;
duralumin pipes up to 12 mm in diameter;
drill;
clamp.

For normal operation of a jigsaw, the following parts must be present: a comfortable handle, a switch (a push-button switch is most convenient), a power cord, and a heating filament.

The first step is to make a frame from a duralumin pipe, but for the base you can also use textolite of at least 10 mm or thick plywood. The lighter the frame made, the easier the jigsaw will be to use. The frame must have a channel for the power cord. Experts believe that best form frame - one in which one of the sides is deviated by 45º.

Then an earring is made from a millimeter-thick copper sheet and attached to the frame with screws in the place where the frame is connected to the handle. The earring, screw and wing nut form a clamp in which the heating filament is fixed. The clamping cheeks are made from a 0.8 mm thick duralumin sheet, and a push-button switch is located between them.

After this, a slot-like hole is cut in the plywood through which the file can pass. It is convenient to make this gap using a drill. Markings are made and holes along it, the transitions between which are smoothed. Instead of plywood, plexiglass, plastic, or metal can be used. The drill is then used to make mounting holes in the plywood and on the base plate itself. A jigsaw on a plywood base is secured with screws so that the file can pass through the gap. The structure is attached to a table or workbench using a clamp so that the file is directed upward. If the clamp is not suitable, you can use another fastener that is more suitable for the specific case. Although the file in this case remains standard, both hands are freed up, thereby increasing the cutting capabilities, so the design is functional even in this form.

As a heating thread, you can use a nichrome spiral from any heating device, for example, from an iron. It is secured like a standard saw blade between the ends of the frame with slight tension. To heat the filament, 14 V is supplied, and a rheostat is used to control the voltage. Current determines length and thickness nichrome thread, a rheostat helps set the optimal current strength. The current strength affects the temperature to which the filament heats up, if too high material heats up and can catch fire, and if not enough, cutting will be impossible.

An optimally tuned jigsaw, made by yourself, will allow you to cut out shapes with complex shapes.

!
Perhaps you have an old sewing machine lying around and it’s covered in dust.
In this article, the author of the YouTube channel “Vladimir Natynchik” will tell you how you can make a completely usable and functional electric jigsaw from it.

This homemade machine does not require turning during manufacturing. All you need are screwdrivers and keys.

Materials.
- Old electric sewing machine
-
- Aerosol paint blue metallic
- Sheet plywood
- Bolts, nuts, washers M6
- Secondary glue, soda
- A couple of bearings, these will fit

Tools used by the author.
-
- Hacksaw
- Wrenches, screwdriver
- , wood drills.

Manufacturing process.
So, Vladimir found an old seagull sewing machine.

To make a machine from it, you will have to remove the mechanism for feeding the fabric and rotating the bobbin. The master warmed up those bolts that could not be unscrewed gas burner. After this procedure, everything is very easy to disassemble.

The author made a small revision in the upper part of the mechanism, lubricated important components, and removed the regulators.

Old electrical wiring was also replaced.

Then the master painted all surfaces of the machine with metallic blue spray paint.

He was in a bit of a hurry with the painting; the machine needs to increase the stroke of the rod. After all, now the plywood will be cut, and not the fabric sewn together. He made a pad from 20mm thick plywood and screwed it between the base and the top of the machine.