Thoughts on the acquisition of a circular saw arise when you need bulk work on sawing timber or boards along the material. Of course, to dissolve the boards, if desired, you can use a saw - a hacksaw or a jigsaw. Masters cope masterly! However, if straight line sawing is required, then such a work will require a circular saw. This power tool is used for cutting wood as well as for plastic and soft metal.
Linear circular saws.
It would seem that the question of how to use a circular saw is quite simple and the answer to it is understandable. However, not all so simple.
What should you know about the circular saw?
“Circulars” are simple. They consist of a base plate and the saw itself. The base plate is created from an aluminum alloy or steel stamped sheet. There are three types of circular saws: stationary, manual and combined.
Before starting work, determine the maximum cutting depth. This moment is the main criterion when choosing a hand saw. It makes sense to ask for what purpose a tool is needed: for professional or for domestic needs?
Also in this case, the size of the tool matters. As a rule, a circular saw of medium size is preferable because of its maneuverability and ease of operation. For a significant amount of work related to clapboard and thin boards when building a house, you will need a stationary circular saw of large sizes. The smallest tool is suitable for thin rails.
The single-phase circular saw with a power of 220 W will easily cope with country and household works.
For large volumes, three-phase instruments (380 W) are required. According to safety rules, they must be grounded.Back to table of contents
Types of circular saws
Types of circular saws.
For domestic needs, manual versions capable of transverse, longitudinal and inclined cuts are quite suitable. They are distinguished by maneuverability, lightness and relatively low price.
A number of models allows you to cut not only from the end, but also in any place thanks to a special dive function. Due to the possibility of tilting relative to the plate, such models cut the material at different angles.
The support plate of such a tool is manufactured by a stamped method (suitable for domestic purposes) or cast (for a professional tool).
For large amounts of work, a stationary circular saw with a box-type bed will be required. They have been used before. Modern models are made very compact, which allows them to be placed on work surfaces, such as workbenches.
For professionals need more massive tools that are placed directly on the floor of the room. They are able to influence the depth of the cut thanks to the moving desktop. The disc remains immobile during operation. Because of this, the possibilities of a circular saw are greatly expanded.
If the work is often done with a variable load, then combined options will do. They differ from manual ones in that there are special fastenings in their case, enabling them to be stationary on any horizontal surface. At the same time, the saw is fixed with a disk upwards.Back to table of contents
The advantages of electric circular saws
Various types of disks for a circular saw.
There are models of saws, which during operation control the load of the tool, protecting it from overheating, and are able to control the speed of the mechanism.
Most circular saws are equipped with an overload indicator and motor brush. Replacing discs is very safe thanks to the built-in rapid braking system and engine blocking of the device.
A number of electronic saws allow you to measure the number of revolutions during movement of the disk when sawing. This feature allows you to work not only with wood, but also with plastic and some soft metals.
More advanced models are equipped with an electronic soft start system. Thanks to her, such tools quickly gain momentum at an even speed.
It is very difficult to get hurt, since such models have a protective cover against saw teeth. It smoothly, without twitching, moves away from the disk during the start of work. A number of some tools of this kind are equipped with a pendulum casing and a roller supply.
Many models that are used for both professional and household work are equipped with special taps that serve to connect a vacuum cleaner. Despite the decrease in maneuverability, such a tool lasts longer, since the number of negative factors is significantly reduced.Back to table of contents
Little about the teeth available
The dimensions of the circular saw.
When choosing a saw for work, it is necessary to consider the characteristics of the teeth. This is necessary because a specific type of material is required.
Circular saw blades with standard teeth are used for soft woods and plywood.
For hardwood or chipboard special carbide teeth are suitable. In addition to a special form and a larger number, they have pokavitovye soldering.
For finishing work, such as longitudinal sawing of boards, a disk with a small (up to 24) number of teeth will be suitable. The smaller, the larger their size. Accordingly, the disk will be faster to cut, but the cut will be rough.
For fine cutting fit discs with teeth up to 36-48 units. Working with material from hardwood or planks with nails will require 54 trapezoidal tipped discs.
The inclination of the teeth can be positive, one that cuts wood. A disc with negative inclination is used to cleanly cut aluminum and plastic.Back to table of contents
About the quality and the result of work
Everyone loves work to be done conscientiously. How to work with a circular saw correctly and achieve a high-quality result?
First of all, a quality cut depends on the type of disc and the frequency of its rotation.
Attention should be paid to the longitudinal and transverse balance of the saw. Efficiency of a cut directly depends on the correct balancing of the device. Any bias causes inconvenience, tension and severe fatigue when working.
The quality of sharpening the disc also greatly affects the process of work. This is especially true for low-power models. You can sharpen a disk in many places, the main thing is to do it before starting work.
The need for sharpening is determined at a number of points:
- during work it is required to apply more force than usual (it is not water to drink);
- the edges of the cut begin to burn;
- frequent engine overheating.
If you let this moment take its course, then the breakage of the tool is not far off. This will eloquently speak smoke coming from the saw, and the smell of molten insulation.Back to table of contents
Features of the work itself
It would seem so easy to work with a hand-held circular saw, but you need to acquire the skill and be careful.
- The depth of the cut. When working with a circular saw, you should set the cutting depth equal to the thickness of the board. For the groove, it should be made somewhat smaller. In addition to security considerations, thus, the board can be cut on a workbench and not spoil it.
- Lower protection cover. When working with the saw blade, one should keep in mind that the casing will open on its own if nothing interferes with it. Therefore, if the board is placed on the workbench, then open the casing "on the machine" will not work or work, but with trauma and damage to the material. The best option in this case would be to manually pull the protective cover to the side. After this, prepare for safe use by holding the saw with the tip of the casing lock and your left hand. Be sure to consider how the saw and the material will work when working.
- Work on the workbench. In this case, the board is placed on the workbench. Further, according to the label, the front end of the saw base plate is combined and tightly pressed against the material. Before turning on its back should be slightly raised so as not to touch. After that, the saw is turned on, the momentum is gained, and the board is sawn through.
The best option would be to expose the edge of the board a little beyond the edge of the workbench.
In hand saws there is a “riving knife”. It is necessary in order to prevent the clamping of the disk. It also prevents the disc from “crashing” into the board during the reverse course.
In circular saws there is a function such as a guide or parallel stop. It allows you to make a cut exactly, strictly on the markup.
Fixation. When working with a hand saw, any workpiece must be fixed. Work becomes meaningless and even dangerous if it moves with a saw or move aside. Specially installed on the workbench stops that prevent the board from moving to the side and forward will help in this matter.
Before cutting, you should mentally carry out the process and make sure that everything happens smoothly, without interference.
Wiring. Handle with care. The motor does not overheat. Giving a saw rest.
Having completed the cut, you should raise the saw up. In this case, the disk must be closed by a casing and be in the position “from itself”. Putting the tool should be after checking for a complete stop of the disk and its cover. It is advisable to fix these simple skills to the level of a reflex.
And finally: you should not buy Chinese products and self-sharpening saws. Choose proven and well-known domestic and foreign brands of circular saws with excellent quality!