Description of makita circular saw

Saw for cutting concrete

Device and purpose

Gas cutters are used for dismantling work.

A hand saw for cutting concrete can greatly facilitate the processing of reinforced concrete, stone, composite, brick and monolithic structures during all kinds of construction work. As a rule, wall saws with diamond discs are used for cutting reinforced concrete, but their use is not always available.

The fact is that the weight and dimensions of such machines are quite large, and therefore they cannot be used in hard-to-reach places, confined spaces, during high-altitude work in industrial mountaineering and other similar areas. Circular saws do not cut to sufficient depth.

Wall saws are often too bulky and heavy.

Therefore, when performing work using wall saws and other heavy equipment, hand chain saws are always used.

The reciprocating design of the cutting headset allows you to work at a sufficient cutting depth - 30 - 40 cm, in addition, it allows the end entry of the saw and the cut with a rotation of 90 degrees, which is important when constructing openings and niches

A foam concrete band saw allows you to cut to a sufficient depth.

The main cutting tool of the device is a diamond chain stretched over a special tire that drives and guides the chain. The concrete chainsaw chain is specially brazed in the form of diamond-coated segments, which makes it more durable and efficient.

The bar with the chain is detached from the saw like a headset, which simplifies maintenance and repair of the tool.

The device has a power unit - a gasoline or electric engine.

Electric chain saw for concrete.

The gasoline unit, as a rule, has a two-stroke principle of operation and is protected from moisture and dust. Torque is transmitted to the chain by means of a clutch or gearbox; most often, modern tools have an automatic centrifugal clutch, which allows the chain to be immobilized at idle speed or to stop it when it gets jammed and other emergency modes.

The tire of a gas saw for a stone is different from the tire of a conventional chainsaw for wood. It is more complex due to the channels through which water enters the circuit. Water is needed to cool the cutting belt and remove concrete-sand sludge and chips, without which the chain will not be able to work for a long time.

The bar and chain are removed from the apparatus.

If the tool is equipped with an electric motor, then it is, as a rule, a single-phase brush unit with alternating current 50 Hz and 230 V. The power of the electric motor can be from 1 to 3 kW, sometimes more powerful machines are found.

Particular attention in the design of electric saws is paid to protecting the engine from water and dust.

Application area

Saw on foam concrete at work.

Electric and gas saws for concrete can be used to cut such materials:

• Aerated concrete, including aerated concrete, aerated concrete, gas silicate, aerated concrete and similar materials;
• Lightweight concrete, including expanded clay concrete, pumice concrete, perlite concrete, polystyrene concrete, arbolite, wood concrete and the like;
• Dense and heavy concrete based on Portland cement, asphalt, slag cement, polymer binder and other types of binder. Heavy concrete can be cut with weak reinforcement;
• Silicate and ceramic bricks, clinker, building blocks made of foamed concrete and other materials;
• A natural stone;
• Porcelain stoneware and other types of artificial stone;
• Gypsum, drywall, chalk, limestone;
• All kinds of composite and complex building materials from solids.

As you can see in the photo, it is possible to cut small holes in natural stone.

Most often, these saws are used in the following areas:

1. Dismantling works for the demolition of walls, partitions, ceilings, columns, diaphragms, crossbars and other elements of enclosing and supporting building structures;
2. Redevelopment of apartments;
3. Construction of additional window or door openings in the walls, as well as adjustment of existing ones during major repairs;
4. Finishing the corners after the work of disc machines;
5. Cutting out niches, holes and openings;
6. Laying strobes and cutting niches for socket boxes, laying various channels and communications, as well as ventilation holes and channels;
7. Cutting of building materials such as concrete blocks, reinforced concrete and stone, brick, foam concrete and others.

It is especially convenient to cut openings.

Since working with the tool is done by hand, it is important to remember about safety measures and protective equipment - gloves, goggles and a helmet. Although the machine is relatively safe, the cost of neglecting these rules may be too high.

Power

The products of this company are known for their high quality, which explains the high interest in them from consumers.

However, before deciding on a particular saw, you need to compare all the offered models by key parameters, among which the main ones for most buyers are power and price.

In order for a circular saw to be able to fully satisfy your needs, when choosing, you need to pay attention to the power of the engine. If you decide to purchase high-performance equipment, then it will not be difficult for you to saw a thick tree, and you can also install a maximum size disc on it.

But remember that with an increase in this parameter, the cost and weight of the saw will increase. In order for the tool to be able to cope with the entire range of tasks that you have to solve, it is best to purchase a model with a power reserve. This will ensure that the speed is stable when using the saw with a powerful motor, and this will allow you to quickly cut dense material.

If you decide to purchase high-performance equipment, then it will not be difficult for you to saw a thick tree, and you can also install a maximum size disc on it. But remember that with an increase in this parameter, the cost and weight of the saw will increase. In order for the tool to be able to cope with the entire range of tasks that you have to solve, it is best to purchase a model with a power reserve. This will ensure that the speed is stable when using the saw with a powerful motor, and this will allow you to quickly cut dense material.

After reviewing the range of circular saw blades, you will find out that today they are offered in three main categories, depending on the power:

• up to 800 W;
• from 800 to 1200 W;
• more than 1200 watts.

The former are used to solve everyday problems, the latter are the choice of professionals, but the third are purchased for industrial production, where this equipment is operated in a continuous mode in particularly difficult conditions.

Varieties of sawing tools

Several well-known companies are engaged in the production of trimming systems. The most popular is the Makita miter saw. The products have an affordable cost, their functionality allows you to perform all the necessary technological operations. Products are produced in several types:

• Console.
• Standard.
• Combined.

Almost all models have the same functions for cutting the required materials. The Makita 1040 product is distinguished by its compactness and high power. The device is designed for intensive work. The saw can cut a variety of materials:

• Wood.
• Plastic.
• Soft metal.

The miter saw has a number of advantages.When a vertical plane needs to be machined, it is possible to tilt the tool from 0 to 45 degrees. To prevent accidental activation of the system, the device is equipped with a special blocker.

The best semi-professional reciprocating saws

The best reciprocating saws from the semi-professional category are endowed with a power of 900 to 1000 W and a long blade stroke (about 20-30 mm), which ensures high productivity. The increased characteristics, in comparison with household models, allow you to cope with thicker tree trunks (up to 200 mm) and metal parts with a cross section of up to 20 mm.

Manufacturers provide them with some functions to make their work easier. For example, the model can be with a soft start, adjustment of the depth of cut, set against the stop, or with a pendulum stroke, which facilitates chip ejection and reduces blade overheating. At the same time, the weight of reciprocating saws of this category is slightly higher, but still convenient for manipulation. They are used both in private needs and in small workshops.

Bosch PSA 900 E

Reciprocating saw with a higher power rating than its counterpart in the same series. 900 watts and 28 mm stroke provide fast sawing of trunks or cant depths up to 200 mm. To accurately start the cut along the intended line, there is a soft start. The tool cuts metal with a cross section of up to 20 mm.

+ Pros of Bosch PSA 900 E

1. It copes well with tree trunks that are more than 30 years old.
2. Simple operation with easy blade installation.
3. High-quality assembly of the case - nothing rattles in the hands, there are no poorly fitted parts, the insides are protected from chips.
4. Smooth running of the blade, relatively quiet operation.
5. Differs in a long service life in the absence of overloads.
6. Compact dimensions are convenient for manipulation in hard-to-reach places and for transportation.
7. Large selection of canvases for electric hawk for different types of materials.

- Cons Bosch PSA 900 E

1. The set comes with a set of low quality files - you have to buy it separately.
2. During prolonged operation, the gearbox (front) gets very hot and breaks are required.
3. A short 2.5 m power cord always needs to be carried.
4. Outside, at the point where the web is connected, there is a slight backlash.
5. There is no button to block accidental starting.
6. The number of revolutions is not adjustable.
7. There is no pendulum motion, so at great depths you have to help the saw to push the sawdust out of the cutting line.

Output. This reciprocating saw is quite suitable for the subsequent refinement of little things in a built house from a log house or for self-installation of a long fence. 900 W power and soft start ensure high productivity and cutting accuracy. With its help, it will be convenient to prepare openings for inserting windows, align the upper edge of the fence.

AEG US 900 XE

The reciprocating saw features 900 W of power and 19 mm stroke. In addition to keyless tool change using the patented Fixtec system, this model has a one-touch adjustment of the cutting depth. On the body there is a switch between normal and pendulum travel, helping to remove sawdust.

+ Pros of AEG US 900 XE

1. A 4-meter cord is convenient for working in a carpentry workshop from an outlet.
2. Supplied in a plastic case that holds the canvas and carrier.
3. Power of 900 W perfectly copes with materials of any density (plastic, wood, metal).
4. Lightweight 2.9 kg for semi-professional tools.
5. The cutting depth is adjusted by moving the stop platform.
6. The start key is wide and comfortable for long-term holding in a clamped position with several fingers.
7. Simple service for replacing carbon brushes without disassembling the entire body.
8. Installation of the canvas in two positions.
9. Can cut in curves and cut workpieces flush against the wall.
10. The large D-shaped handle is suitable for large hands.

- Cons of AEG US 900 XE

1. There is no soft start and speed maintenance under load.
2. Poor quality of runoff canvases.
3. Violent vibration, tiring hands.
4. Soft rubber on the clip in the front - when working with foam blocks, it is frayed from coarse sawdust.
5. The pendulum stroke exists as a separate mode, but the dynamics of this stroke is not regulated - it is always at the maximum.
6. It is absolutely impossible to work with one hand, therefore it is hardly applicable in hard-to-reach places.

Output. A reciprocating saw works well for trimming thick branches, old tree trunks in the garden, or trimming logs. The pendulum motion, which expands the kerf, will ensure the exit of chips and keep the blade from overheating. Thanks to this, the saw will not jam and will be able to function for 4-5 hours every day.

Features of the repair of electric reciprocating saws

In what cases is it necessary to repair the reciprocating saw, and is it possible to do it yourself? Let's analyze the main types of breakdowns that lead to the failure of a hand-held power tool. These include:

• jamming of the electric motor;
• sparking and burning of the collector brushes;
• mechanical damage to the network cable;
• rapid heating of the device case;
• lack of inclusion when pressing the "Start" button.

All these malfunctions are eliminated by disassembling the tool, identifying the cause of the breakdown and eliminating it. For example, if sparking occurs, the first thing to check is the condition of the collector brushes. Most likely, they are exhausted and need to be replaced. Severe tool runout, noise and vibration can all be signs of a defective gearbox. In this case, it is necessary to disassemble it, check the integrity of the gears and change the oil (any other lubricating component).

In addition, you need to check the bearing for integrity, and, if necessary, install a new one. Often the cause of serious mechanical damage is the self-disassembly of the tool and the violation of the order in the assembly of parts.

In the absence of practical experience in repairing electrical equipment, it is better to entrust this task to professionals.

Dear Readers! On our site you can leave feedback on the work of electric saber saws and other types of hand tools. Also share your experience in operating equipment and methods of carrying out repair work.

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Japanese standard devices

To cut PVC or soft metal, the Makita 2414 system is used. The installed limiter in the form of a spark shield increases the safety of the saw. The main positive qualities of this device include:

• Fixed spindle.
• Additional handle.
• Special casing.

The work is carried out at 3.5 thousand revolutions. The motor develops a power of about 200 watts. At an angle of 90 degrees, the cutting depth reaches 120 mm. Tool weight - 16 kg.

Combined sawing devices differ from others in the combination of functions that are present in other systems. Such products have high power, develop a large number of revolutions. They can work with a large angle of inclination of both the material and the device itself.

How to choose a quality saw

There are a number of parameters by which you can distinguish professional equipment from household equipment. These include the performance of the engine, the quality of the materials and parts used, and the resource of the engine.

It is logical to assume that a tool for household use will have less engine power than a professional model.If the engine is limited to low power and is supported with smaller disc diameters, the tool will not be able to penetrate deeper into the material.

If we talk about desktop and hand-held equipment, then there are more options for choice. To be correct, it should be done with an emphasis on the individual needs of the operator. To do this, he must decide where he most often plans to use the sawing equipment. If the tool is purchased for cutting material in the garage or in the country, then it is here that the bulk of the work will be carried out. In this case, a circular table saw is the best choice. Such a tool is impressively powerful, and on top of that, it provides the most comfortable working conditions.

Today in stores you can also buy models designed for installation on a bed.

It is imperative to pay attention to this parameter when choosing a tool. But besides this, there are other characteristics that should be considered when choosing a tool.

One of them is a manufacturer who must have a good reputation. Such should be called the Makita company, whose products are in great demand among a wide range of consumers.

Powerful electric circular saw Makita HS7601 for home and garden

• weight - 4 kg;
• power - 1200 W;
• rotation frequency - 5200 rpm;
• cutting depth - 66 mm;
• disc diameter - 190 mm.

The powerful compact electric saw cuts neatly and evenly in a straight line. When installing a special blade, it is possible to cut non-ferrous metals. Safe operation is ensured by a cover that covers the disc and a button to protect against accidental activation. The depth of cut is adjustable to avoid dangerous kickback when the saw head gets jammed. To collect sawdust (to see the cutting line), a branch pipe is provided to which a vacuum cleaner can be connected.

The cutting angle is adjustable from 0 to 45 degrees. To increase the cutting accuracy, you can attach an additional guide bar, to which an adapter is provided in the design.

Users emphasize the build quality (no backlash), light weight (relative to power), and thoughtful design. Many have noticed that the native disc is of excellent quality. Some buyers note the rather weak bearing of the circular saw blade reducer.

Pros:

• powerful;
• compact and easy to use;
• easy access to the brushes for replacement;
• moderate noise level at idle;
• the wire insulation does not harden in the cold.

Technological features of the device

The main difference between the Makita miter saw is the equipment of the product with a special electric motor. During production, the model is equipped only with a motor that is designed for certain jobs. To improve the quality of the tool and its reliability, the company uses only the best materials. The production is carried out according to quality standards that were developed by Japanese engineers. Their requirements are much tougher than those accepted in such an industry.

For cutting workpieces with high precision under various slopes, Makita trimming was developed. This tool can be called a classic wort that has undergone a major modernization.

The device has become widespread, but it is not suitable for carrying out continuous work, because the cut is performed with an ordinary hacksaw. Using a Makita Miter Saw, you can easily make a miter joint. This led to the appearance of several additional names for the tool:

• Handicap.
• Miter saw.
• Miter saw.

Popular models

There are many different circular saws on the market, differing in purpose and characteristics. There are some models that are most demanded by users.

Makita DSS610Z

The model interacts with a powerful lithium-ion battery. Accurate and fast cutting is carried out thanks to the rip fence and the ruler.A protective cover on the disc protects against possible injury. The backlight helps you work in poorly lit areas.

Advantages:

• LED lights.
• Electric motor brake.
• Cutting depth up to 36 mm with a 50 ° tilt.
• Start blocker.

Disadvantages:

• The aluminum outsole is scratch-resistant.
• No wedging tooth.
• When sawing at a 45 ° incline, the battery interferes.

Reviews:

BOSCH PKS 18 LI 0

The device is ergonomic and compact, it is used for cuts with high precision. Easy sawing with CutControl. Efficiency is ensured by a quality saw blade and intelligent energy distribution. Quick and easy setting of the cutting depth. Easy replacement of disks.

Advantages:

• High precision saw blade.
• Compact design.
• Protective cover on the disc.
• A place to connect a vacuum cleaner.
• Universal battery.
• Slow charge consumption.

Disadvantages:

• Low power.
• There is no battery indicator.

Reviews:

BOSCH GKS 12V-26

A circular saw that performs well on short cuts. The right tool for joiners, carpenters and floor planners. The model stands out for its light weight and compact dimensions, it contains two batteries.

Advantages:

• Accelerated cutting.
• Backlight.
• Cut level scale.
• Ease.
• Engine life extension system.
• Ideal for short cuts.

Disadvantages:

• Short rip fence.
• Inconvenient location of the engine.

Reviews:

Greenworks G24CS

A good alternative to a chain saw. Features laser pointer, markers and guide plate for accurate and precise cuts. There is a smooth adjustment of the rotation speed, an unscheduled start blocker.

Advantages:

• Low weight.
• Spindle lock for fast disc relocation.
• Laser pointer.

• Possibility of tilting at an angle of 45 °.
• Protective cover.
• Smooth speed adjustment.

No disadvantages were identified.

Reviews:

Makita HS301DZ

Compact saw for ripping, straight and cross-cutting wood up to 26 mm thick. The device is shipped without charging or power supply. It is possible to adjust the tilt angle from 0 to 45 °.

Advantages:

• Lightweight and compact.
• Cutoff blowing function.
• Tilted cuts up to 45 °.
• Elastomer cover for handle.

Disadvantages:

There is no rip fence.

Reviews:

Einhell TE-CS 18 LI-0

The device is used for straight cuts in plastic and wood products. There is an adjustment of the angle and depth of cut without the use of tools. The instrument is equipped with high quality illumination. The aluminum housing ensures a long service life.

Advantages:

• Light weight and size.
• Parallel stop.
• Vacuum cleaner connector.
• Easy disc change with a spindle lock.
• Ergonomic handle.
• Special protective cover.

Disadvantages:

Shaft with backlash.

Reviews:

BOSCH GKS 18V-57

Professional device for wood processing. It stands out for its productivity and high quality of work. The device's mobility allows it to be used in a wide variety of areas. The saw is well balanced and does not overload the hands during use.

Advantages:

• Protective cover.
• Braking system.

• Practical rubberized handle.
• Backlight.

No shortcomings were found.

Reviews:

Table of comparison of characteristics of circular saws: