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 hand saw at one time became a real breakthrough. The cutting blade of this tool only moves in one direction, so the working efficiency is extremely high. The circular saw is often used for sawing various materials, and its electric version is a very effective and often used tool in everyday life and in production.
The circular saw - an efficient and functional tool for sawing a wide variety of materials
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Electric circular hand saw device
Each of the models of the circular electric hand saw works on the same principle. An electric motor is hidden inside the body of the tool, which rotates the cutting disc. The main differences always lie in the type of construction - manual or electric. The disc in a hand-held circular saw is manually driven, as the name implies, 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 way they transmit torque. In a hand-held circular saw with the possibility of a stationary installation, the disc is mounted directly on the shaft, while in electric models the drive belt transfers the torque.
Compact and powerful hand-held circular saw Mafell K 65
Also, regardless of the type of saw, it has a special support platform that allows you to adjust the cutting depth and its angle.
A separate type of mini-saws of circular electric hand-held - models powered by a battery. Of course, they cannot boast of the same power as their mains-powered counterparts, but they can be used 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 during the process of cutting materials, and the battery keeps up perfectly without recharging for more than one hour.
Optional attachments to control the accuracy of the cut make it easier to work with the circular saw
As with any other complex tools, circular saws are:
- household - characterized by a relatively small power and a set of settings, but they are extremely easy to use and do an excellent job of cutting small volumes of materials;
- semi-professional - a little more powerful and functional than household ones, but they do not reach the professional level;
- professional - can 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 frequently saw large volumes of building materials, then you cannot do without a professional model. But with ordinary repairs on your own, a semi-professional saw will be enough.
Bosch PKS 16 Multi mini hand-held circular saw - lightweight and compact tool
How to choose the right circular saw
In the modern market for construction tools, there are a huge number of models of circular hand saws. If you are wondering which hand-held circular saw to choose, then here it is worth understanding a number of nuances. First of all, when choosing a saw, you need to pay attention to the main characteristics, which will be discussed below.
Saw motor power - a parameter that directly affects the efficiency of the tool. If you want to buy a circular hand saw that can be fitted with a large diameter cutting blade, then you need a model with a powerful motor. The same characteristic affects the cutting depth and the force of rotation of the blade. A low-power saw can get stuck when cutting extremely hard wood and fail at the most crucial moment.
The downside of any powerful model is its weight. For example, an electric hand-held circular saw for wood with a 1200 W motor will weigh about 4 kg, and with a 2000 W power, it will already weigh 7 kg.
Support platform allows you to adjust the cutting depth
Cutting depth - directly depends on the previous parameter. The more powerful the engine, the larger the drive can be installed on it. In total, there are 4 standard sizes according to the cutting depth of the saw. The first is a household one, which is 40-45 mm, the second in depth is a 50-55 mm cut - it is used for semi-professional needs.
Professional circular saws are characterized by a cutting depth of 60-70 mm, and the latter 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 to your needs. By the way, some models have a function for adjusting the cutting depth.
Rechargeable models are very convenient for work in places where there is no access to electricity
Disk rotation speed - the density of the material that the saw can cut depends on this parameter. Also, the higher the RPM, the cleaner the cut.
Useful advice! Many users mistakenly believe that the more engine power, the higher the rpm of the disk. In fact, there is no direct connection between these two parameters. Low-power saws for sawing chipboard have a large number of revolutions and cleanly cut brittle material.
Adjusting the angle of inclination of the cut - this function is now available in almost all models of electric hand-held circular saws for wood. It is used mainly for professional work, and is not needed for amateur sawing boards or plywood.
Circular saw with tilt adjustment
Circular saw electric hand: additional functions
Many modern saws have a number of additional features that allow for cleaner cuts and many other things. Below are some popular and useful features:
- immersion in the material - this function makes it possible, when working with the material, to start cutting it not from the edge of the sheet, but from any place;
- connecting a vacuum cleaner is a very useful function that allows you to blow off the sawdust formed during operation. This not only cleans the air in the work area, but also significantly improves the view of the material;
- start interlock - to start the saw mechanism, press two buttons simultaneously. This prevents the user from starting the saw suddenly, that is, increases the level of safety during operation;
Rockwell RK3440K network circular mini-saw with laser pointer
- soft start - the disc starts to rotate smoothly, and not immediately at maximum speed. This extends the term of his work;
- laser pointer - when available, there is no need for a guide rail for a hand-held circular saw. But for this you need certain skills, since a beginner, who first took a circular electric hand saw in his hands, will not be able to make an accurate and even cut;
- stationary dust and shavings removal system is a very practical thing for small volumes of work. For example, the Makita 5017 RKB circular saw has such a container, which makes it very convenient for working in a confined space.
In addition to all of the above, it is very important to have hinged protections that cover part of the disc.
Circular saw Makita 5017 RKB is equipped with a plastic container for collecting sawdust and an efficient dust extraction system
Choice of blades for circular hand-held 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 saw blades with the right blades? It is necessary to take into account what materials you plan to work with. Since the disc with trapezoidal teeth is excellent for neat work with many materials, variable teeth are used to cut wood along the grain.
For harder materials, it is recommended to use discs with hardened teeth or carbide tipped. Carbide tipped circular saws are more expensive to sharpen than conventional saws, but they last longer and provide more efficient work.
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The main characteristics of circular saw blades are outer diameter, blade thickness and number of teeth. The most common and universal type of discs is 20 centimeters.
Use a guide bar when using the circular saw to prevent the blade from slipping to the side.
Useful advice! The outer disk size is not as important as the inner one. It is the inner diameter that is the fitting parameter. It is not possible to attach an incorrectly matched blade to the saw.
The quality and pace of work depends on the number of disc teeth. For a more accurate cut, the number of teeth should be higher, but the work will then go slower than with a disc with fewer teeth.
Ideally, a good owner should always have several different discs on hand in order to work most effectively with different materials.
The quality of work directly depends on the selected circular saw blade
Rules for working with a circular hand saw
Despite all the protective measures and additional accessories, the circular saw is a rather dangerous tool. In order to minimize the likelihood of injury during work, a number of simple rules should be followed. For example, circular saws with a guide bar should be used to ensure that the blade does not accidentally slip to the side. The part should be fixed as securely as possible, and it is worth pressing the saw against it. If the saw has various additional functions, you should familiarize yourself with them before starting work.
For safe work on the circular saw, it is necessary to follow the operating rules and be sure to use safety glasses
How to choose the best circular saw for your needs? If you have no experience with this class of tools, then it is better to consult a specialist. And remember that even the most touted saws, such as Bosch circular saws, are not versatile, so it is always best to have a set of blades on hand, or even several saws, if you are planning to work regularly with different materials.
