What is a jigsaw and what is its device? This question is very important for beginners. The jigsaw is an electric saw with the movement of its working part of a progressive-return nature (working blade). The jigsaw includes a ski in order to guide the working canvas during the execution of reciprocating movements on the treated surface. Jigsaw makes such movements at a frequency of up to 3 thousand oscillations in 60 seconds.
Scheme of the jigsaw device.
The mechanics of the electric jigsaw
Jigsaw is best suited for curved and even cuts, for cutting around a circle of different diameter (the radius must be at least 15 millimeters). It is ideal for cutting rectangular and square cuts. Jigsaw can handle any material:
- steel sheet;
- ceramic tiles.
The principle of the jigsaw is based on the movement of the working tool, which is progressive in nature (that is, the file itself). She moves on special guides. In this case, the direct sawing process takes place exactly at the moment of its movement upwards, not downwards.
The main characteristics of household electric jigsaw.
Such a process has an important feature: even if the surface of the workpiece is very sensitive, the edges of the cut are even, without burrs and roughness and chips. In modern models of electric jigsaws, a support roller is attached to the jigsaw for a better direction of the cutting part. The presence of a special mode, the so-called "pendulum" blade saw, is an important feature of one or the other of the jigsaw.
During the work process, the cutter moves along a curved line, and not just up and down, this happens by moving the mechanism that directs it. Thus, the material is filed in front of itself. Such a mode is used only when the jigsaw cuts strictly in a straight line, it increases the quality of the segments several times. There is a special switch with which the amplitude of the pendulum stroke is regulated, it is in each model of jigsaws. It is needed to control the power of the jigsaw when working with materials of various kinds. Manufacturers themselves are advised to use this method, since, in their opinion, it increases the service life of the files.
Previously, the wizard almost did not use electric jigsaws because of the tendency of thin canvases to bend, break, leave the cutting line. Therefore, modern devices have high-speed electronic controllers and highly balanced engines with a small degree of vibration. Due to this, these types of saws are convenient, they have a low noise effect and high ease of operation. Standard models will cope with many projects, but if money allows, you can spend money and buy a jigsaw for more professional performance of such operations.Back to table of contents
Types, characteristics and features of saw blades
Types of saw blades for jigsaw.
Varieties of paintings can be divided into several subspecies:
- on the material with which you have to work;
- the shape of the teeth;
- depending on the distance between the teeth;
- across the width of the saw blade;
- depending on the thickness of the cut.
Consider them in more detail.
Different resistance when cutting depends on the material with which you have to work. Therefore, you should choose a file, the most suitable for a particular material. Assignment is one of the first and most important search criteria.
There are various canvases for:
- of stainless steel;
- laminate flooring;
- ceramic products;
- for plastics of different types and materials from fibers;
- for wood with metal splashes.
The shape of the teeth depends on how quickly and precisely the cutting will occur. If the teeth are thin and often located, the process will be slower, but more accurate and accurate. If the teeth are large and rare, then the work will be rougher, but much faster. The technology by which the teeth are made determines their geometry and direction. There are four main types of teeth in shape.
Jigsaw blades are selected depending on the material being processed.
A pitch is a distance that counts from one tooth tip to another. If a tree or other material is cut across, it is better to have blades with a large tooth, if this is a common joinery work - with a small one. Also influenced by factors such as the thickness of the material itself.
The wider the canvas, so it is stronger. The width also affects the quality and time for which the work will be done. and how quickly you will work not with an even cut, but with a curve. The width depends on the stability, which implies a high cutting speed. The wider the canvas, the smaller the angle of deviation from the desired line. To perform a curve cut was better, you should use narrow files. The narrower it is, the easier it will be to turn the jigsaw while working with curved lines. How accurately you will fit into the turns when carving and how much easier you will manage with a jigsaw, it all depends on the thickness of the blade.
On how firmly the blade for cutting during cutting on a flat line, is directly affected by its thickness. It is important to cut perpendicularly to the workpiece plane: this will provide fewer burrs and boils. But this method is not suitable for cutting very thick blanks, even if the width of the blade allows you to do this, as in this situation it is more expedient to use circular or circular saws.Back to table of contents
Jigsaw jigsaw mount
The scheme of fixing the saw in elekrolzbik.
The accuracy of the device and its performance directly depend on the features that were listed above. But there are other things that affect how comfortable a jigsaw is. While using the jigsaw you will have to face the replacement of the saw blade. This is not related to the performance of works of different types, in which the canvases should also be used different. The type of shank that occurs most often is European, or, as it is called differently, "Boshevsky". It has a cross configuration. Such files are sold in absolutely any shop selling instruments, this is their peculiarity.
As a rule, there are two main ways of fixing the file, it can be:
- front mounted in jigsaw;
- quick-lock in jigsaw.
In many cheap models of electric jigsaws, the block, which is tightened with screws (there are two of them), cuts the canvas with a cut. These screws are front-facing. Such a system has high compatibility, but otherwise loses. For example, fasteners that are not evenly clamped can cause skewing. In this case, additional wedging should be carried out. Impacts of the saw on the workpiece with the butt may cause the front pad to break in half or break the thread of the screws - this occurs when the tool is not handled properly.Back to table of contents
Quick-release fastening blade
The most convenient are electric jigsaw with a system of quick-clamping fastening of the canvas.
Ways to realize a large number. The only significant difference from "ordinary cartridges" is that there is no universality. Only files with the same shank are suitable, and there is also a backlash. Most often this does not play a big role, as the paintings are a huge amount. Secure the file between the jigsaw axles. A backlash, in turn, will not affect the jigsaw, it usually has a longitudinal shape. The only minus of the quick-locking locks - the thickness of the blades to be clamped has a limitation.
It is very easy to insert a file. The jigsaw, which has a narrow canvas, is capable of making quite complex bends. But for this it is necessary to turn in the direction of sawing the whole tool or the board itself, with which you will have to work. It is good when there is a scroller in jigsaw - a special device for turning the saw directly during work without affecting the position of the tool.
To do this, there is a handle that is located at the top of the jigsaw case. You can insert the saw into the jigsaw and fix it in 4 positions. While turning the saw one should be attentive to one thing. The pressure on the saw should be directed only to the rear edge, especially when turning. If this is not taken into account, the file will eventually break or distort, which will lead to its deformation. With this technology, you will understand how to insert a file in jigsaw.