Circular electric manual saw: the subtleties of choice and features of work
When sawing materials with a conventional saw, half of the energy is wasted, as it is spent on returning the tool to its original position. Therefore, the invention of such a tool as a circular electric manual saw, at one time became a real breakthrough. The cutting blade of this tool moves only in one direction, so the work efficiency is extremely high. A circular saw is often used for sawing different materials, and its electric version is a very effective and often used tool in everyday life and in production.
Electric Circular hand Saw device
Each of the models of a manual circular electric saw works on the same principle. An electric motor is hidden inside the tool housing, which rotates the cutting disc. The main differences are always in the type of construction – manual or electric. The disk in the manual circular saw is driven manually, as the name suggests, but in the electric one there is an electric motor.
These two types of saws differ not only in weight and dimensions, but also in the method of torque transmission. In a manual circular saw with the possibility of stationary installation, the disc is mounted directly on the shaft, whereas in electric models the torque is transmitted by the drive belt.
Also, regardless of the type of saw, it has a special support platform that allows you to adjust the depth of the saw and its angle.
A separate type of mini electric manual circular saws are battery-powered models. Of course, they can not boast the same power as their counterparts working from the grid, but with their help it is possible to carry out work away from sources of electricity.
Useful advice! When building a country house, it is convenient to use a cordless saw. Its light weight and compact size will not let you get tired quickly in the process of cutting materials, and the battery lasts perfectly without recharging for more than one hour.
Like any other complex tools, circular saws are:
- household – characterized by relatively low power and a set of settings, but extremely easy to operate and perfectly cope with cutting small volumes of materials;
- semi–professional – a little more powerful and functional than household, but they do not reach professional;
- professional – withstand heavy loads during long-term work, can have a number of useful additional functions, are used in the field of professional construction.
If you plan to cut large volumes of building materials often, then you can not do without a professional model. But with normal repairs on their own, a semi-professional saw is quite enough.
How to choose the right circular saw
In the modern market of construction tools, there are a huge number of models of circular hand saws. If you are wondering which manual circular saw to choose, then it is worth understanding a number of nuances. First of all, when choosing a saw, it is necessary to pay attention to the main characteristics, which will be discussed below.
The power of the saw motor is a parameter that directly affects the efficiency of the tool. If you want to buy a circular hand saw, on which you can install a large diameter cutting disc, then you need a model with a powerful engine. The same characteristic affects the depth of the cut and the force of rotation of the disc. A low-power saw can get stuck when cutting particularly hard wood and fail at the most crucial moment.
The disadvantage of any powerful model is its weight. For example, an electric manual circular saw on wood with an engine power of 1200 watts will weigh about 4 kg, and with a power of 2000 watts – already 7 kg.
The cutting depth depends directly on the previous parameter. The more powerful the engine, the larger the disk can be installed on it. In total, there are 4 standard sizes according to the cutting depth of the saw. The first one is household, which is 40-45 mm, the second one is 50-55 mm in depth – it is used for semi–professional needs.
Professional circular saws are characterized by a cutting depth of 60-70 mm, and the last standard size is up to 140 mm. Saws of the latter type are used in industrial production, it is almost impossible to use them at home. How to choose a circular saw for wood by cutting depth? Compare the sizes with your needs. By the way, some models have a function for adjusting the depth of cut.
The speed of rotation of the disk – the density of the material that the saw can cut depends on this parameter. Also, the higher the rotation speed, the cleaner the cut.
Useful advice! Many users mistakenly believe that the greater the engine power, the higher the speed of the disk. In fact, there is no direct connection between these two parameters. Low-power saws for cutting chipboard have a large number of revolutions and cleanly cut fragile material.
Adjustment of the angle of inclination of the cut – this function is now available in almost all models of electric manual circular saws on wood. It is used mainly for professional work, and it is not needed for amateur cutting of boards or plywood.
Circular electric manual saw: additional functions
Many modern saws have a number of additional functions that allow you to perform a more accurate cutting and many other things. Below we will look at a number of popular and useful functions:
- immersion in the material – this function makes it possible to start cutting it not from the edge of the sheet, but from any place when working with the material;
- connecting a vacuum cleaner is a very useful function that allows you to blow away the sawdust formed during operation. This not only cleans the air in the working room, but also significantly improves the visibility of the material;
- start lock – to start the saw mechanism, you need to press two buttons simultaneously. This does not allow the user to start the saw suddenly, that is, it increases the level of safety during operation;
- smooth start – the disk starts to rotate smoothly, and not immediately at maximum speed. This prolongs its working life;
- laser pointer – if available, there is no need for a guide rail for a manual circular saw. But for this you will need certain skills, since a beginner who has taken a circular electric hand saw in his hands for the first time will not be able to make an accurate and even cut;
- a stationary dust and chip removal system is a very practical thing for small amounts of work. For example, the circular saw of the Makita 5017 RKB has such a container, which makes it very convenient for work in a confined space.
In addition to all of the above, it is very important to have hinged protections covering part of the disk.
Selection of discs for circular manual circular saw
The main working part of any circular saw is the cutting disc. It is with its help that the material is cut. How to choose circular circular saws with the right discs? It is necessary to take into account what materials you plan to work with. So a disk with trapezoidal teeth is great for careful work with many materials, variable teeth are used to cut wood along the fibers.
For harder materials, it is recommended to use discs with hardened teeth or carbide solders. The price of sharpening circular saws with carbide soldering is higher than conventional ones, but they last longer and provide more efficient operation.
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The main characteristics of circular saw discs are the outer diameter, the thickness of the blade and the number of teeth. The most common and universal type of discs is 20-centimeter.
Useful advice! The external disk size is not as important as the internal one. It is the inner diameter that is the landing parameter. It is impossible to fix an incorrectly selected disc on the saw.
The quality and pace of work depends on the number of teeth of the disc. For a more accurate cut, the number of teeth should be greater, but work in this case will go slower than with a disk with fewer teeth.
Ideally, a good host should always have several different disks at hand in order to work most effectively with different materials.
Rules for working with a circular hand saw
Despite all the protective measures and additional accessories, a circular saw is a rather dangerous tool. In order to minimize the likelihood of injury at work, a number of simple rules should be followed. So, it is necessary to use circular saws with a guide tire so that the canvas does not accidentally go to the side. The part should be fixed as securely as possible, and it is worth pressing the saw against it harder. If the saw has various additional functions, then you should familiarize yourself with them before starting work.
How to choose the circular circular saw that best meets your requirements? If you have no experience with this class of tools, it is better to consult with specialists. And remember that even the most highly touted saws, such as Bosch circular saws, are not universal, so it’s always better to have a set of disks or even several saws at hand if you plan to work regularly with different materials.