What is a jigsaw and what is it for?
Jigsaw. hand or electric tool for shape, straight sawing of various materials. Depending on the blade and configuration it can work with wood, ceramics, plastic and even glass. It is distinguished not only by its functionality, but also by its scope of application. It is an indispensable tool for those tasks that can not cope with a manual or circular saw.
The first jigsaws were invented in the mid-16th century.
At that time they had a primitive design, consisting of a U-shaped or U-shaped frame, a working blade.
There was a serious drawback. to work with any material you had to adjust the tension manually, which complicated the sawing process.
In modern manual models the configuration has not changed, but elements responsible for the tensioning of the saw have been added (the first clamping mechanism was patented in 1876).
The jigsaw is a shape or precision cutter in wood or other materials. It is used for making differently complex cuts in wood, metal, ceramic, and composite materials. It consists of a metal frame with a mounting clamping system, a handle and a working blade. a saw blade with teeth of different length and size. Cutting blade moves in one direction only, workpiece or saw blade must be turned over to change cutting plane.
Important! The jigsaw has a number of limitations in operation. With it, it is difficult to make even straight saws, cut off part of the workpiece at an angle of 90 o without a special guide plane.
What is a jigsaw
The whole point of the jigsaw is to cut out shaped elements from materials of low thickness with a low degree of hardness. The device can be used for straight cuts, but a regular saw can do it many times faster. The jigsaw has a rather low operating speed, but it leaves behind a neat line to trim the cut, something that classic hand saws or circular saws cannot boast of.
The first hand jigsaw dates back to the 16th century. The tool was made of wood and was U-shaped (the saw was of course made of metal). Looking at what a jigsaw consists of nowadays, you can notice that its frame has become arched, and its material has been replaced from brittle wood to a more resilient metal.
A hand jigsaw consists of a handle, a frame and clamps for fixing the saw blade.
The unique design of the device, combined with the miniature dimensions of the sawing element, allows you to saw not only from the edges, but also from the inside of the workpiece. This feature, many times increases the quality of the work, allowing you to make through holes in tile, plywood, wood and other materials.
Design and characteristics
It should initially be noted that the tool is divided into two large classes: manual and electric jigsaws.
The former are more suitable for fine and precise work with small elements, while the latter in most cases are involved where you want to quickly make a shaped hole or perform a straight cut.
The design of the hand jigsaw is extremely simple, it consists of the following elements:
Arc-shaped metal frame of small size.
Predominantly made in the shape of a “P” or “C” in steel.
Its main peculiarity is a big gap between the upper part and the stretched blade.
This allows the frame not to rest against the edges of the workpiece, and bypass them.
If it is necessary to make a cut along a line that must not extend beyond the workpiece, then a hole is drilled in it.
Then the blade is removed from the frame, and passed through this hole, and again attached to the frame.
Blade. the working, sawing part of the tool with fine teeth.
Stretched between the ends of the frame (fixed by its fasteners).
Has a big disadvantage. low mechanical strength, which, coupled with the small dimensions of the frame, makes it impossible to saw far from the edges of the workpiece.
The blade itself often breaks and breaks off.
Handle. an element that is installed on one side of the frame and is designed to hold the tool comfortably with one hand.
Made of wood, metal or plastic.
The standard electric jigsaw consists of:
- A body with a comfortable handle and start button, in which all electric elements are hidden.
- An electric motor with a gearbox.
- Saw blades.
- Guide support plane fixed in the lower part of the frame.
- Various optional extras for convenient operation: backlight, pendulum stroke switch, additional guiding mechanism, laser pointer, etc.
The principle of an electric jigsaw consists of reciprocating sawing movements at high speed.
It is fixed in a rod, which is moved by power transfer from the motor by means of a gearbox.
Sawing is perpendicular to the work surface.
Size and weight
The most common hand jigsaws have a weight of 285 g with a blade length of 130 mm and a cutting depth of up to 300 mm.
But there is a tool with the following parameters:
Parameters of typical electric jigsaws:
Block: 3/6 | Number of characters: 2545
Before buying a blade, you need to clarify which shank will fit your model of electric jigsaw. There are only 4 variants, and now we will look at them:
It is impossible to say which one is better. If it is not a Chinese fake, the quality is not disputed. The main thing is that the shank should fit the seat of the tool. The length of the blades varies in the range 40÷250 mm. But when buying saws, it is worth taking into account the capabilities of the tool, its power.
Manual jigsaw is fundamentally different from the usual pruning saw: the saw is sawing at the moment when the master pushes it from him, and the jigsaw, on the contrary, spends a cut, when the tool moves in the direction of the employee. This is due to the fact that the working teeth are directed towards the handle, not away from it.
So, the order of work with the hand jigsaw looks as follows.
- To begin with, it is necessary to make a workpiece. If you have already decided on a pattern, then you can safely transfer it to the work surface. usually for this purpose use copy paper. It is attached to the workpiece, place the desired pattern on top and with a sharp pencil translate on the wood or plywood.
- After that, the workpiece should be well fixed. for this purpose, a special support is attached to the workbench or any other table with a clamp. The workpiece is placed directly on the base and the main process. sawing. begins. The technology of cutting has its own peculiarities. Professionals advise to saw in a sitting position, with the handle of the jigsaw should be at the bottom. The worker moves his hands up and down, trying to hold the saw precisely vertically, otherwise the workpiece could simply be damaged. In those areas where the contour is curved, it is advisable to rotate the workpiece itself, but not the jigsaw, otherwise you can break the blade. If you need to make a sharp corner, then you need to stay in one place until the saw blade turns, and then. continue to work.
Sometimes it is necessary to saw the figure starting from the center of the workpiece. in this case you will need to use a hand drill to drill a small hole inside the figure and start sawing from there.
However, try not to make it too close to the planned contour, otherwise the plywood can be chipped. Then the saw should be taken out of the tool, inserted evenly into the hole, then. again fix it on the tool and continue its work.
- The sawed out parts should be machined until smooth. usually using sandpaper, files. If necessary, the surface is covered with varnish or paint. in this case, the finished product will look more stylish, and most importantly. will last more than one year.
What is the right jigsaw for your home??
If you decide to opt for an electric jigsaw exclusively for home use, then you should pay attention first of all to tools with a rubberized base, as well as stops in front, which are usually made of plastic and a soft handle.
In general, its use involves practically any task. If you do not have time to understand the different models in detail, you can simply look at the jigsaw photos presented in the store and opt for one of the most popular firms Interskol. However, if you have the desire, you can try and get to know its various properties.
Metal should be strong, difficult to bend. Wooden handles are more secure than plastic ones. The last ones can fly out of the groove, which may cause injury. Tightening the fastener should be easy, without the need for additional tools. The winglets with small lugs make the work more difficult, t.к. They are difficult to grasp and fix.
The important point is the choice of the manufacturer. Products made in China are not durable. It is recommended to choose the products of trusted companies. These include Stanley, Intertool, Mastertool and Topex.
Durability and ease of use depend on the right choice.
Top 5 best tools
The lineup of jigsaws is represented by various types, but there are not many really worthy tools. Below will be presented the 5 best stationary jigsaws for quick and quality work.
JET JSS-16A 10000808MA
Machine power of 90 watts, its main purpose is to work on the house, cottage. The device has 1600 revolutions per minute, which plus can be adjusted, which is very convenient. Mainly the device is designed for woodcarving, the maximum depth of cut is 5 cm. Such a machine has a weight of 13 kg.
Stalex SS-16EW 387005
A great tool for sawing wood. The tool is designed for household purposes, t.к. the power is 90 W. Speed per minute is 1500, it is impossible to regulate it, what makes the work much more complicated. But the plus side is that you can change the angle of the stationary tool. Tool weight. 14 kg.
Ryobi RSW1240G 5133002860
A handy stationary jigsaw that is really worth the money. First, it weighs not much, only 10 kg, which is good for a stationary machine. Secondly, the power of 125 watts, the work is longer and more efficient. Third, it moves at 1,700 strokes per minute, so it cuts cleanly and accurately. Saws both wood and small metal structures.
Enkor Korvet-87 90870
Good value for a decorative cut with saw blade thickness of 0.25mm. Machine power 85 watts. Number of strokes per minute is 1400, which can be adjusted. You can also change the angle to make a better and neater sawing. unit weight. 7,5 kg.
JET JWSS-22B 727200BM
Very powerful device, designed for more professional work. Power is 300 W, number of strokes per minute is 1550. It is convenient that you can saw at an angle to the left as well as to the right. Additional features include automatic sawdust blow-off, as well as workplace illumination. The machine weighs 31 kg. The device is expensive, but it is worth its money.
To summarize, we can conclude that the stationary jigsaw is a necessary thing for professional craftsmen, an ordinary person can do without it. But if you also purchase a tool, you need to consider all the characteristics, as well as familiarize yourself with the best in the model range, so that the jigsaw machine lasted long and did not break down.
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