How to work with an electric saw
Electric circular saws, like any tool, require certain guidelines. Saw blades or blades with sharp cutting edges and blades connected to an electrical outlet are not safe tools. Improper handling can cause serious injury to the operator. You should therefore use your chain saw with extreme caution and observe the following safety precautions.
Since this power tool is a highly injurious piece of equipment, a certain amount of caution must be exercised when working with the saw.
General safety requirements
Work with circular electric saws is allowed only for persons above 18 years old, who have been instructed and have completed practical training on work with such tools. Workers are strictly forbidden to smoke in the workplace. Personnel must also be familiar with fire-fighting and first aid. First aid kit and fire extinguisher must be easily accessible. In case of feeling unwell, the foreman must refrain from work.
Safety Requirements Before Starting Work
No foreign objects allowed in the workplace. It is necessary to remove all objects from the working table of the unit (wrenches and adjusting keys), and also to free all approaches to it. The floor near the workstation must be non-slip, clean and dry to prevent the operator from accidentally falling on the machine while it is running. The machine should be well grounded.
The operator’s clothes must be buttoned up and tucked in. Do not approach the machine with the ends of your clothes developing. Long hair must be picked up and hidden under a headdress. The operator’s eyes should be protected with safety glasses and breathing apparatus with a respirator or a normal surgical mask (can be bought at your local drugstore). It is also advisable to protect the hearing organs with special headphones.
Before starting the saw, check
- The serviceability of the saw blade (no broken blades, no dirt, quality of sharpening)
- the reliability of its attachment;
- The riving knife and guide bar are properly installed;
- Availability of a protective cover.
If a handheld circular saw with a short electric cable is used, an extension cord will be needed so that the operator can move freely within the working area. The electric handsaw must be equipped with a soft start system to prevent jerking of the tool during start-up.
If the design of the machine doesn’t provide it, you can connect the soft starter through an external module made by your own hands or bought in China.
Safety precautions during operation
Allow the machine to idle before sawing with the circular saw. If irregularities are detected, the unit should be shut down and the faults corrected. The following guide should be followed during the sawing process.
- When starting work, the operator must be on the left side of the machine, near the left (front) corner of the worktable, so that the workpiece can be thrown away without injuring the operator.
- Workpieces before sawing, should be carefully inspected to exclude the presence of nails, ice, dried mud or concrete, which can get on the cutting trimmer line.
- Never pass any objects over the rotating saw of the machine.
- If the board is cracked or has knots, slow down the feed of the workpiece as the saw approaches these places.
- The workpiece must not be brought close to the saw by hand. There are special pushers for this.
- Do not use the circular saw with the riving knife and blade guard removed.
- To change the disk on a circular saw, you must first de-energize the machine completely. It is not enough to switch it off with the button.
If the machine operator is assisted by a partner in accepting the board, he must also adhere to the rules:
STOP DOING THIS! How To Use A Circular Saw THE RIGHT WAY!
- A board should be fed in without tilting;
- The part can be removed from the table only after it has completely passed through the riving knife;
- After accepting the part, it should be put aside (stacked) and clean the work area near the saw blade of scraps, using a long stick;
- It is forbidden to pull the workpiece toward you while sawing.
- the feed of the board to the saw should only be from the side of the machine operator, who controls the movement of the workpiece.
What is a hand held circular saw and what is it for?
A circular saw is a specialized tool designed for sawing woodworking materials. Its main purpose is to work with wood: board, plywood, fiberboard, particle board, laminate, etc. However, the efficiency, reliability and ease of operation of the tool has contributed to the expansion of its capabilities, so today manufacturers produce a variety of discs (nozzles), through which the circular saw can cut not only wood, but also plastic, concrete (stone) and even metal.
When using the tool to work with different materials, it is important to consider the power of the electric motor. The smaller it is, the less resistant types of products can be processed with this device. In addition, it is also important to note the fact that the circular saw is designed primarily for sawing or cutting sheet materials, whether it is wood, plastic or metal.
Having understood the main purpose of the tool, it is also worth noting that there are restrictions on its use. The main one is the impossibility of using the device to make shaped cutouts. This means that a handheld circular saw is designed to make straight cuts only (i.e.е. sawing in a straight line). Another limitation on the application of the handheld circular saw is the thickness of the material being cut. The larger the size of the workpiece, the greater the power reserve should be in the electric motor of the tool.
This is interesting! To extend the functionality of manual circular saws, their design provides for the possibility of sawing not only at an angle of 90 degrees to the sawn surface. Thanks to the possibility of changing the position of the sole plate, the cutting blade can be set in relation to the sawing surface at different (necessary for the solution of a particular task) angles, i.e. angular sawing is performed.
Three main saws
Of all the varieties of hand saws, it is useful to have these three in every workshop.
These saws, which vary in size and execution, including the versions with a shank, work in a “on itself” motion. The steel blade is tensioned, making it thinner than for pusher-force saws. A taut, thin blade deforms less and jams in the kerf less frequently. Many people find this method of sawing more controllable. Japanese saws are used for both dimension sawing and making joints.
If you often have to saw off protruding flush plugs and dowels, add an unset Japanese hacksaw to your collection. it leaves virtually no scratches on the surrounding surface. (Most saws have teeth slightly bent on both sides, one after the other, to make the kerf narrower than the thickness of the blade to keep the blade from sticking in the kerf.).
Classic longitudinal and crosscutting saws.
Today’s traditional European-style saws have a different number and shape of teeth, allowing for faster and less effort. For most tasks it is convenient to have a 350 mm long hacksaw (length of the saw is measured along the teeth). A 550-650 mm long hacksaw is also a good idea for cross-cutting long boards or sawing out rough pieces of wood.
Circular Saw Safety
Designed for making precise cuts and making joints, this saw usually has finer teeth than conventional hacksaws. Distinctive feature of this blade is the steel or brass shank on the top edge of the blade, which gives more rigidity and precision to the cut.
Conventionally all circular saws can be divided into manual and circular. The latter are small machines with a disc fixed in them, in relation to which you move the workpiece.
- Check that it is in good working order (you can simply turn it on by weight).
- Check that the type of disc is suitable for the material to be machined and that it is securely fastened to the spindle.
- Check that the blade is intact and free of cracks and that all teeth are free of any tipped carbide tips.
- Use a face shield or at least safety glasses.
- Do not operate the hand circular saw with the blade against the workpiece, the blade should be free.
- Do not apply excessive pressure on the tool, so as not to overload it.
- Clean the saw after use, especially the moving parts.
- All circular saws are made for right-handed people, so position yourself to the left of the workpiece.
- Before you begin, check that there are no nails or other metal parts in the header.
- If the wood has large knots, the moment the blade approaches them you need to slow down a bit because of the hardness of the workpiece.
- If the disk is to be replaced, the machine must be completely disconnected from the power supply.
- Before starting the circular saw start the circular saw blade and wait until it reaches a speed. Do not feed the workpiece immediately, and especially do not hold it against the static saw blade.
- Use the pusher to move the workpiece. At the extreme, use your hands on either side of the saw blade, but not on the same axis as the saw blade.
With these simple rules you can easily use the circular saw in your home workshop.
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When you need a hand saw
Some operations, such as trimming protruding dowels and plugs flush with the surface, shaping oblique studs, or sawing short trim profiles is better done by hand. It is often quicker and safer to make cross-cutting into blanks with a regular hacksaw than to try to balance with a long board at the saw machine. And many carpenters just enjoy sawing studs and other joints by hand.
Although a hacksaw is often the best tool, it usually does not cut as cleanly as a coping saw or a circular saw with a high-quality blade. So when the quality of the cut is important, saw by hand a little away from the intended line and then remove the allowance by planing or sanding, or sawing to the final size on a machine with a circular saw blade.
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The difference between the European and Japanese circular saws in direction. Japanese saws have tooth tips tilted to the handle, so the working stroke is done when you pull the saw toward you, rather than pushing it away from you.
How to use a circular saw correctly
Thoughts of purchasing a circular saw arise when volume work is required to cut a beam or planks along the material. Of course, to dissolve boards, if desired, you can use a saw. a hacksaw or a jigsaw. Masters will cope virtuoso! However, if you need to saw in straight lines, then it is a circular saw that is required for such work. This power tool is used for cutting wood as well as plastic and soft metal.
It would seem that the question of how to use a circular saw is quite simple and the answer is clear. However, not everything is so simple.
What to know about the circular saw?
“Circular saws are simple. They consist of the base plate and the saw blade itself. The base plate is made of aluminum alloy or pressed steel sheet. There are three types of circular saws: stationary, manual and combined.
Even before the work begins it is necessary to determine the maximum cutting depth. This point is the main criterion when choosing a hand saw. It makes sense to ask for what purposes the tool is needed: for professional or household needs?
The size of the tool also matters in this case. As a rule, a medium-sized circular saw is preferred. because of its maneuverability and ease of operation. For the significant amount of work associated with linings and thin boards in the construction of the house, you will need a stationary circular saw of larger size. For thin laths the smallest tool will do.
Single-phase circular saw with 220 W power will easily cope with cottage and household chores.
For large volumes, you will need three-phase tools (380 W). They must be grounded according to safety rules.
Types of circular saws
For household needs the manual versions are quite suitable, capable of transverse, longitudinal and oblique cuts. They are easy to maneuver, lightweight and relatively inexpensive.
Some models allow making a cut not only from the end face, but also in any place thanks to a special immersion function. They can saw at different angles of the material, thanks to their ability to tilt it in respect to the board.
Base plate of such tools is molded (suitable for household purposes) or cast (for professional tools).
For large amounts of work, a stationary circular saw with a box-type frame is needed. They were also used in the past. Modern models are made very compact, allowing them to be placed on work surfaces, such as workbenches.
Professionals require more massive tools that are placed directly on the floor of the room. They are capable of influencing the depth of cut thanks to a moving work table. The circular saw blade remains stationary while working. This greatly expands the possibilities of the circular saw.
If work is often done with alternating loads, combination saws are suitable. They differ from manual circular saws in that they have special mounts in their body, allowing stationary operation on any horizontal surface. The saw is clamped with the disc upwards.
Benefits of electric circular saws
Different kinds of circular saw blades.
There are saw models that control the tool load during operation, protecting it from overheating, and are capable of controlling the speed of the mechanism.
Most circular saws have an overload and brush indicator on their motors. Changing circular saw blades is very safe thanks to the built-in quick braking system and locking of the machine’s motor.
Some electronic circular saws let you measure the RPM of the blade during the sawing process. This feature allows you to work not only with wood, but also with plastic and some soft metals.
advanced models have an electronic soft start system. It makes these tools quickly gain speed at an even speed.
It is very difficult to injure oneself because these models have a blade guard. It moves smoothly and without jerking when the saw blade starts to work. Some of these tools have a pendulum-type shroud and feed roller.
Many models used for domestic and professional use have special leads to connect a vacuum cleaner. Although less maneuverable, it lasts longer, because it greatly reduces the number of downsides.
A little about the available teeth
When choosing a saw to work with, the characteristics of the teeth must be taken into account. This is necessary because a particular material requires its own type of.
Circular saw blades with standard teeth are used for soft wood and plywood.
For hardwood or chipboard, special carbide-tipped teeth are available. In addition to their special shape and larger quantity, they have a hammer bit.
For carving work, such as ripping boards, a blade with a low number of teeth (up to 24) is the right choice. The fewer the teeth, the bigger the size. Accordingly, the disk will be faster to cut, but the cut will be rough.
For finish cuts, discs with 36 to 48 teeth are fine. Work on hardwood material or boards with nails would require 54 trapezoid shaped blades.
Tooth pitch can be positive, so it cuts through wood. A disc with a negative inclination is used for clean cuts in aluminum and plastic.
About quality and results
Everyone likes a job well done. How to work with a manual circular saw correctly and achieve a quality result?
A quality cut above all depends on the type and RPM of the circular saw blade.
Attention should be paid to the longitudinal and transverse balance of the saw. Efficient sawing performance depends on the right balance of the machine. Any misalignment causes discomfort, strain and extreme fatigue while working.
The quality of the sharpening of the blade also has a great influence on the working process. This is especially true of low-power models. A variety of sharpening stations are available, but it is important to sharpen the circular saw blade before starting work.
How to work with a circular saw?
A circular saw is a special piece of equipment designed to cut evenly through planks or timber. The use of the device requires some knowledge and skills. To understand how to use a circular saw, you should familiarize yourself with its working principle and operating capabilities.
Design and principle of operation
The design of the circular saw is quite simple. The device can be manual or stationary or combined models.
Regardless of the type, the equipment consists of a saw and a base plate. The latter element is made of strong steel sheets or aluminum alloys. The main purpose of the circular saw is the precise and qualitative longitudinal sawing of wood.
Cutting boards and bars is performed by rotating the discs, which have special guards that serve as protection from injury during the working process. Cutting part is driven by starting mechanism. Circular equipment allows you to process large volumes of wood.
Classification of types and sizes
Circular saws are divided into two classes. household and professional. The equipment differs in power, size and diameter of the saw blade:
- Domestic models are small-sized equipment weighing 4 to 5 pounds that are usually used for sawing wood in the home. Equipment power. not more than 1800 watts. The disc size in such saws is 160 to 200 millimeters.
- Professional circular saws are designed for processing large amounts of wood. They can cut beams with thickness up to 85 millimeters. The weight of such equipment exceeds 8 kilograms, and the disc diameter is 250 millimeters. Professional saws have higher power. over 1800 watt.
Household circular saw model
Several types of circular saws are produced:
- Standard. The model is designed for sawing wooden bars with a density of up to 85 millimeters.
- Mini saw. Small circular saw unit weighing up to 2 kilograms with power up to 800 watt. Used for cutting thin wood.
- Submersible. The equipment is used to cut holes inside the wood. The design of such a saw consists of a mechanism that facilitates the vertical plunge of the blade.
- Diamond. This type of equipment is designed for cutting of hard materials like stone, ceramics or tiles. Working mechanism of the device consists of a diamond disk, which allows to carry out the cut to a depth of 55 millimeters.
- Cordless. Such a circular tool has low power and fairly compact size. The device runs on battery power, and is often used in the construction of wooden houses.
Circular saws are divided into four types depending on the depth of the blade:
- Professional. from 65 to 140 millimeters;
- large. from 70 millimeters;
- medium. 55 millimeters;
- Small. 40 to 46 millimeters.
The quantity of teeth on the disk is very important for the quality of cut. the smaller they are, the lower the performance of the circular saw. For large-scale woodworking, special cutters with tungsten carbide tips are used.
Types of work
Area of application of a circular saw depends on its size and type.
Manual circular saw
Such electric saws are designed for making precise, straight cuts in small thicknesses of wood materials. Manual circular saws are small in size and most often used for home use.
Small sawing equipment for wood is needed for interior construction. Handheld circular saws are often used during renovations to cut laminate or wall finish material.
Stationary circular saws are equipment for daily use. Such professional machines are able to process a large amount of wood per day. They have a fairly large weight. more than 10 kilograms and high power up to 2500 watts.
Circular machines are used mainly in industries for industrial purposes. The cost of such a device is quite high. Some smaller models of circular equipment also have a stationary function. They are successfully used in home workshops.
Manual and stationary circular saws have a similar principle of operation. But the management of the equipment has some differences.
The circular hand saw is an effective and safe tool. But still the use of such equipment requires compliance with some operating rules:
- Connecting to electric power. An extension cord is often used when using the saw in areas remote from the power grid. It must fully match the power of the circular saw. Before connecting it, you should check the integrity of the cable insulation. When connecting the saw to the network, you should check that the switch on the device is off.
- Material attachment. The wood to be sawed should be well secured on a level surface. To do this, the material is placed on a workbench and secured until it is completely stable.
- Setting depth of cut. Determine the required cutting depth with the help of the scale on the machine. When sawing the bar the disk should not protrude beyond the material, otherwise the workbench could be damaged. That’s why it is advisable to set the cutting depth to a value a little less than the required cutting depth.
- After you have set all the necessary parameters you should set the cutting mechanism in motion. Only start the cut with the circular saw blade rotating. Saws must move smoothly and evenly along the material.
Always unplug the hand-held circular saw at the end of the sawing operation.
Types of sabre saws
As for the saber saw, it has similarity with usual drill, but instead of a drill it has a saw blade, thus the principle of work of saber saw is completely different from that of a drill. Power supply for both types of the tool is the same. from line or battery.
Power consumption of the sabre saw is 400 W to 1500 W, which corresponds exactly to the power consumption of a drill.
Another similarity is the speed control, as well as the substitution of different nozzles for different types of work. So, the variety of attachments keeps increasing, the most popular attachment is the hacksaw blade.
We also saw the light of day with variable serrated bits, which became universal. Thus, it became possible to use the part of the saw that was needed, most often used when cutting wood, and it is possible to adjust either the quality of the cut or the speed of the work. But at this time there are also saws for plastic, ceramic, metal, glass. Attachments exist for saws as well as other tools, for example, sanding, file, brush, file and many others.
How to work correctly with a saber saw
The saber saw itself is quite light, especially when compared to a chainsaw, it weighs about two kilograms, which allows you to hold it with one hand. If we compare the saber saw with a circular saw, the result is the same as with a chain saw. The advantage of the saber saw over these two saws is that the chain saw only needs wood and thicker wood, while the circular saw only works flat, not allowing for protrusions and notches. Thus, it can be seen that each saw has its own area of application, exactly where it has no equal. often saber saws are used when cutting pipes, window frames, for rescue work. In the choice of power, purchase depending on where it will be used.
In ease of use, the main point is the anti-vibration system, the second most important is the tool-less saw blade change function, thus reducing maintenance time.
In terms of safety, the saber saw is by far the safest, as it has only one cutting side, and there is protection against unwanted activation. Also, the saber saw is considered a non-dusty tool and multifunctional, and can be a good helper to plumbers, rescuers, roofers. Using such a tool significantly reduces the time compared to manual work.