Training in working with a gas cutter: setting up and starting, rules for cutting metal and concrete, safety precautions

Disc for gas cutter

The division is carried out according to several criteria. Depending on the material that needs to be cut, discs come in the following types:

1. For metal
   . For working with different products and workpieces.
2. On wood
   . The disc has sharp teeth located along the entire edge.
3. By stone
   . There is diamond coating on the edge of the disc.
4. On concrete
   . Presence of thick diamond coating.
5. For reinforced concrete
   . Used where reinforcement is present.

In addition, the division occurs based on the appearance of the disk:

1. Turbo disk
   . A universal option for any type of cutting. Wave-shaped edge with slanted grooves. By reducing the thickness of the circle on the gas cutter, natural cooling of the disc occurs.
2. Solid
   . Solid version with continuous diamond edge. Carry out wet cutting.
3. Segmented
   . The edge has slots that help cool the blade during operation. Used for dry cutting.

How to use a gas cutter?

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The first thing you need to know when working with a special-purpose tool is compliance with safety precautions

It is important to use the following protection measures:

• glasses and mask;
• headphones;
• helmet;
• clothes made of thick fabric;
• closed shoes and gloves.

It is important to first check the instrument for possible damage. The correct procedure for starting a gas cutter is as follows:

• the instrument is placed on a flat surface;
• the lever is moved to the working area;
• open the air damper;
• start the engine with a sharp movement of the starter handle;
• close the air damper halfway to idle;
• release the shutter lever and press the start button.

Rules for working with a gas cutter

For high-quality and safe use, it is important to adhere to the following recommendations:

When performing dry cutting, care must be taken to ensure that the blade does not overheat. Costs every 2 minutes

make a stop. A complete and compact circular saw must have a protective cover. It is important to remember that the gas cutter is designed for straight cutting only. The edge of the saw blade should smoothly touch the work material. Movements should not be sudden or with strong pressure. Work begins after the tool has reached the required speed. The cuts are not made deep to prevent pinching of the disc. It is prohibited to grind products with a working disc.

This will lead to cracks and destruction of the cutting edge. The correct position of the gas cutter is on top of the work surface.

Do-it-yourself petrol cutter

To save money, craftsmen can try to assemble the instrument themselves from available materials. A petrol cutter for asphalt or other material is made from the following items:

• chainsaw;
• grinder head assembly;
• tires;
• pulleys;
• belt.

The design of a gas cutter is as follows:

1. The belt is located along the axis of the tire.
2. The pulley is fixed to the sprocket.
3. The gear in the grinder assembly has been removed. It is machined and a pulley is made to fit its dimensions, which is welded.
4. The tires are shortened and welded.
5. The attachment is removable and, if necessary, the chainsaw can be used for its intended purpose.

Communities › This is interesting to know. › Blog › Friday chainsaw crafts!

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Light weight and solid power combined with compact dimensions allow this “lumberjack’s dream” to be combined with an ice auger and a bicycle, a sawmill and a winch.

Anyone who can confidently work with a welding machine, an angle grinder, and, if necessary, can even use a lathe, can make interesting homemade products from a chainsaw with their own hands.

In this case, knowledge of the basics of design and drawing will be very useful, since the accuracy of all dimensions and quality of assembly are the main conditions for the normal functioning of a unit driven by a chainsaw.

Without going into technical details, we will consider the most interesting designs using it.

Options for homemade chainsaws

The first thing that comes to mind when you think about what can be done with a chainsaw is its use as a sawmill. Many developers had to split logs onto beams with this tool.

In this case, the log lies motionless and is neatly sawn along its entire length without wobbling or oblique seams. If you equip such a mobile carriage with four lifting screws, you can accurately set the thickness of the sawn timber.

Rating of the best gas cutters

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We present to your attention a list of the best models of this equipment. These include:

HUSQVARNA K760 350-25. The Husqvarna petrol cutter is considered a universal type of equipment. The tool can easily handle metal and concrete surfaces. There is an additional cleaning filter that controls dust emissions during operation. The comfortable handle ensures proper use of the structure at any angle.

Makita DPC6430. The Makita petrol cutter is equipped with a quick start. The equipment has a tight fastening, which ensures reliable fixation of all elements together. There is a function here that provides a two-level arrangement of the cutting element.

Thanks to this, there is unobstructed access to the surface being treated. The design can work up to 2 hours without interruption. There is automatic air filter cleaning here.

Still TC 420. The petrol cutter still has an automatic system for tensioning the belt drive during operation. The design has a large air filter. It reduces the amount of dust generated when cutting hard surfaces.

The only drawback of this model is the budget materials in the body. Basically, it is dense plastic that is not able to withstand constant mechanical stress. It is used for both professional types of work and household needs.

The powerful motor provides the maximum number of revolutions per minute. It can handle iron and concrete structures with ease. In the process of contact with an object, the tool produces minimal vibration. In addition, the device consumes a minimal amount of fuel.

Top 10 best gas cutters

The rating includes the best models from the world's leading manufacturers.

Stihl TS 800

Abrasive cutting machine with a cutting depth of up to 145 cm. The tool is used in construction, repair of industrial equipment and rescue operations. The Stihl TS 800 petrol cutter is built on the basis of a 6.8 liter petrol engine. With. The starter with ElastoStart damping element allows you to start the power plant with one jerk. The multi-layer air filter ensures that dust particles are removed to the outside, which maintains power performance.

A cutting wheel with a diameter of 40 cm is used for cutting asphalt, stone and concrete. To cool the gas cutter, there is a water supply fitting, which ensures a wet cut. The operator's hands are protected thanks to a sophisticated anti-vibration system. The fuel tank is designed for 1.2 liters of gasoline. The decompression valve significantly reduces the tractive effort required to start.

Stihl TS 760

Manual professional model of gas cutter for cutting natural stone, brick, concrete, ceramic tiles. The unit is equipped with a two-stroke gasoline power plant with a capacity of 6.5 liters. With. (4800 W) and a volume of 111 cm³. The spindle rotation speed reaches 8400 rpm, at rated load - 4600 rpm. The tool is equipped with a cutting disc with a diameter of 400 mm, providing a cutting depth of 145 mm.

To protect against sparks, a lightweight metal casing is provided, which is adjusted by the operator before work. The handle for holding the tool has a modern ergonomic design. Buffer elements prevent the transfer of vibration from the engine to the hands, which saves effort during work. The 3-stage filtration system ensures clean air in the work area. The weight of the model is 15.4 kg.

Stihl 420

Lightweight manual model with a 4.4 liter two-stroke petrol engine. With. To quickly start the device, a special wear-resistant cable is provided. The tool cuts hard materials with a 35-centimeter circle to a depth of 12.5 cm. You can work with a diamond blade for cutting metal, since the dust is removed by a special water supply device. The anti-vibration system makes the operation of the gas cutter as comfortable as possible.

Since the engine is equipped with purging, fuel consumption is reduced and the amount of harmful emissions is minimized. The air filter with a cyclonic air separation system does not require constant cleaning, which helps to increase its service life by 1 year. To protect the operator's hands, located on 2 comfortable handles, a lightweight and durable magnesium casing is used.

ECHO CSG-680

The petrol cutter model is equipped with a two-stroke single-cylinder engine with a maximum power of 4.08 liters. With. Disc diameter - 355 mm. When using a hub, you can use discs with a 22 mm fit. The diaphragm-type carburetor allows convenient operation in any position. The rotation speed of the disc is adjusted using the throttle trigger. The level of vibration is reduced by rubber insulation between the motor and the handle.

The dual filtration system quickly removes dust in any conditions. A special casing protects the operator from flying sparks. At the bottom of the device there is a rubber screen that ensures the safety of your feet. For quick access to the air cleaner, the tool is equipped with a tightening screw. The design provides a convenient drive belt tensioning system.

Hitachi CM75EBP

Petrol cutter for metal, stone, concrete and other hard surfaces. 5.3 liter two-stroke petrol engine. With. provides spindle speed up to 4200 rpm. High performance is combined with economical fuel consumption and minimal emissions of toxic gases. The petrol cutter model is equipped with a 355 mm disc with a maximum cutting depth of 160 mm.

The water cooling system makes working with the tool comfortable and safe. To protect the operator, a special metal casing is installed on the working disk. The ergonomic handle provides a comfortable and secure grip. The air filter protects the starter and compression system from dust. The fuel tank is designed for 1.1 liters of gasoline. The delivery set includes a built-in accessory holder.

Advantages and disadvantages compared to a gas burner

The petrol cutter is not very popular among specialists. Many people still use gas cutters. And there are a number of reasons for this. Let's compare the advantages and disadvantages of both technologies. Advantages of a petrol cutter:

• Mobility. The gasoline cutter is quite easy to carry. The compressed air container is smaller in size and weight than oxygen cylinders. Fuel is easy to get, it is available in any garage, or you can buy it at a gas station.
• Ability to work at low temperatures. According to manufacturers, a gas cutter with a spray operates at temperatures of -40 and below. The cutting torch does not work in the cold.
• Simplicity of design. A gas burner is not a super complex device. But a gasoline cutter is easier in any case. If you know how to solder, making repairs will not be difficult.

The disadvantages are no greater than the advantages. But they are more significant:

• Difficult to set up. The fuel supply constantly needs to be calibrated, and the injectors have to be cleaned periodically. A gasoline cutter cannot be used out of the box. Quality work requires practice and skill.
• The need to maintain pressure in the tank. It is unlikely that you will be able to work with a gas cutter for a long time. It is necessary to constantly maintain the pressure in the oxygen tank. The quality of the flame depends on the volume of air in the cylinder, and you have to constantly adapt to pressure changes, and therefore the power of the burner.
• Safety. Although oxygen cylinders for gas cutting are considered to be explosive, if used correctly, the risk of an accident is minimized. A gasoline cutter requires careful control and responsibility at all stages of work. Especially when it comes to models with an evaporator, where the fuel boils on the flame of an additional nozzle.

How to choose?

Before purchasing a tool, it is recommended that you familiarize yourself with the characteristics of gas cutters. This equipment is used for any type of work. It easily copes with the installation and dismantling of metal and wooden parts. It is used in the construction of roads and residential buildings.

What should you pay special attention to during the selection process? There are several criteria that will help you choose the appropriate model.

These include:

The material with which the tool will work. There are three types of models designed for different types of hard surfaces. These include: a device for cutting metal, concrete and a universal design. The first type has medium power. As a rule, gas cutters for metal have little resistance to iron parts.

Cutting type

When choosing, it is important to consider the processing method. Models with automatic cooling are considered the safest.

During operation, a small amount of a cooling component is supplied, which prevents overheating of the equipment. This prolongs its performance.

The best inexpensive gas cutters

If you want to purchase a high-quality and efficient tool for cutting metal and concrete for private purposes (for small jobs), then you need to pay attention to the Hitachi CM75EAP model. It can cope with many types of durable materials and has a very convenient design.

Petrol cutter Hitachi CM75EAP

Characteristics of gas cutters

The modern market offers a wide selection of different models. According to consumer reviews, the greatest demand is for semi-professional options that cost less and perform multiple tasks. This type of autonomous circular saw has the following characteristics:

• tool design;
• equipment power – on average 3-3.5 kW;
• cutting height – approximately 125 mm;
• disc diameter – about 350 mm;
• diameter of the mounting hole is on average 20 mm;
• engine volume – on average 65-75 cm³;
• tank capacity – approximately 0.65-0.7 l;
• noise level – approximately 95-100 dB;
• instrument weight – about 9.5-12 kg;
• additional functions.

Petrol cutter Echo CSG-680

The semi-professional Japanese model CSG-680 petrol cutter is a productive and versatile unit. The manufacturer has provided the ability to change disks. It is possible to cut wood, plastic, concrete, and metal products. You can also work with a diamond cutting disc. The design is equipped with a powerful 1-cylinder internal combustion engine (2-stroke type) and is complemented by an air cooling system. The equipment is supplied as standard.

Advantages of Echo CSG-680:

• Convenient belt tension system. The manufacturer has provided additional mechanisms to simplify the belt tensioning procedure.
• Power transmission system. Thanks to the addition, the tool cuts any materials accurately and accurately.
• The presence of a diaphragm carburetor. Allows you to perform cutting operations on materials at the required angle.
• Classic filtration system.

• Innovative starting system. To increase cutting efficiency parameters, the manufacturer used an innovative ignition system - automatic change in ignition timing.
• Convenient location of control units, which facilitates the operation of the tool and makes it safer.
• Availability of additional security systems. The manufacturer has supplemented the unit with a right-hand shield, a special vibration and noise suppression system, a muffler with a spark extinguisher, and a metal screen with a rubberized coating to protect the operator’s hands and face.

Disadvantages of Echo CSG-680:

• Very heavy equipment. My hands get tired after 10-15 minutes of work. Carrying the instrument is also inconvenient due to the bulkiness of the case.
• High price.
• Unbalanced design.
• No smooth start.

In general, consumers called the equipment safe and functional. Many consider this equipment to be the best in its class - reliable, powerful and safe. A small percentage of buyers who tried the equipment in use indicated a high noise level and a weak filtration system. About 20% of buyers were dissatisfied with the quality of the case and its design features.

Video review of the Echo CSG-680 gas cutter:

Rating of petrol cutters

To make the right choice, it is recommended to first get acquainted with the models that are very popular. The best gas cutter should be chosen from the following list:

1. Stihl TS 420
   . Low vibration and comfortable handle shape allows you to work in any position.
2. Husqvarna K 760
   . The petrol cutter quickly copes with the assigned tasks in the most emergency situations.
3. Makita DPC 6431
   . Reinforced aluminum casing for low vibration.
4. Partner K 750
   . The body of the model is shortened, which helps control the process.
5. Hilti DSH 900-X
   . It has a powerful motor, reinforced with a protective casing.
6. Hitachi CM75EAP
   . The cheapest tool. Suitable for cutting metal.
7. Echo CSG-680
   . Manual petrol cutter with automatic ignition advance system.
8. Wacker Neuson BTS 635
   S. A simple device with a durable body and good dust and moisture protection.
9. Oleo-Mac 983TTA-14
   . Suitable for semi-professional use.
10. Solo 881-14
    . The advantage is its lightness and good weight distribution. Technically complex device.

The best premium gas cutters

Among the premium gas cutters, we can highlight the Husqvarna K 760 model. It is the leader in our rating, as it has a huge cutting depth and is a universal tool. However, its price is unlikely to be suitable for a budget buyer. Typically, the device is used in professional practice for large volumes of repair or construction work.

Petrol cutter Husqvarna K 760

Video - Husqvarna K760 petrol cutter

Types of gas cutters

Depending on the properties of the material being processed, tools fall into the following categories:

1. For metal
   . Power up to 4.2 kW.
2. On concrete
   . Power more than 4.2 kW. The chain cutter for concrete has a disk rotation speed of 4.7 thousand revolutions/min.
3. Universal models
   . The tools are endowed with the highest performance, as they are designed to work with different types.

In addition, there is a division according to purpose into:

1. Rail cutters
   - there is a mechanism that significantly expands the depth of cut. Used by railway line installers.
2. Wall chaser
   – works with two diamond-coated discs. Used to create grooves for electrical wiring in various surfaces.
3. Chain cutter
   - the tool looks like a gasoline saw; a diamond chain allows you to cut both metal and stone.
4. Chrome-plated gas cutters
   - used for rescue operations.

Principle of operation

The most common gasoline cutter is the Vognik cutter. It comes in various modifications, but the principle of operation does not change significantly depending on the model.

The cutter consists of two tubes connected to the containers at one end and connected to each other at the other. The first tube leads to an oxygen reservoir. The second is connected to a container with gasoline. When the fuel valve opens, gasoline flows into the nozzle. The oxygen supply atomizes the gasoline and pushes it out at high speed.

Types of portable cutters

A portable gas cutter is a fairly simple design. The principle of operation is the creation of a directed jet of flame by mixing oxygen and flammable gas. The cutter is based on a cylinder and a burner that is attached to it. According to the type of fuel supply, portable cutters are divided into:

• Injection
• Injectorless.

The main advantage of injection-type cutters is their high combustion temperature. The main advantage of injection-free cutters is their high mobility and simplicity of design.

Injection portable cutters

1. Combustible gas is supplied under high pressure through a twin tube
2. Oxygen is supplied in the same way
3. The gas mixed in a special chamber, without losing its initial speed, escapes from the nozzle
4. Using an external source, or through a built-in piezoelectric element, a spark is supplied

The mobility of the injection burner is not high. The design of two cylinders is quite cumbersome. However, these burners are designed to be carried by one person.

Injectorless portable burners

A gas collet is one of the cheapest tools for gas welding. It consists of a gas cylinder with a capacity of up to 0.5 liters, to which a burner with a nozzle is attached through a collet connection. The advantages of the device are:

• Highest mobility. The entire structure weighs no more than 700 grams. No special containers or bags are needed for carrying.
• Versatility. In addition to their direct functions, such burners are used for heating car locks, as a blowtorch, etc.
• Ease of use. There is no need to fine-tune the fuel supply to the nozzle. To get started, just click the button with the piezoelectric element.

There are also quite a lot of disadvantages. The main ones include:

• The flame goes out easily. The injector-less design does not involve active oxygen supply. The strong flow of compressed propane creates an unstable jet of flame that is easy to knock down.
• High operating costs. Consumption is about 200 ml. gas per hour of work. Those. even the largest cylinder will be discharged after 2.5 hours of operation.
• Relatively low combustion temperature. Although mini-cutters heat up to 1300 degrees, they cannot compete with their injection counterparts. The gas exit velocity, as well as the efficiency of the mini-cutter, is lower.

Mini-burners, even similar in appearance, differ significantly both in flame quality and design solutions. For example, a mini gas cutter from KOVEA Fire-Z Torch is manufactured on a collet connector and has an operating temperature of up to 1500 degrees. And the HecatonTorch KT-2610 burner from the same company produces a flame of up to 2500 degrees.

Additionally, the Fire-Z Torch uses a collet connection for disposable cylinders, while the HecatonTorch uses a US thread. If you need a portable blowtorch with advanced functionality for the garage, it is better to purchase the first option. And if you consider the torch as a professional tool, it makes sense to overpay 1000 rubles and buy HecatonTorch with a US connection

Petrol cutter - firepower!

Experienced welders know that a gas cutter is an autogenous apparatus used for oxygen cutting of metals. Experienced builders know a completely different kind of unit under this name - a powerful tool in which cutting metal and more is performed by a diamond-coated disk. The device of the first is in many ways similar to an acetylene generator. The volumetric tank is equipped with a manual air pump that creates excess pressure. Under its action, fuel is supplied to the cutter - gasoline vapor and oxygen coming from different hoses. First, the metal in the cutting line is heated, then it is cut under a stream of oxygen.

The main fuel for this type of gas cutter is, as you may have guessed, gasoline, and less often kerosene. Gasoline-oxygen flames have a well-defined flame core, making the flame easier to control. Compared to acetylene devices, their use is more economically profitable, although the growing cost of products from the oil refining industry may well equalize the costs. In addition, a gas cutter consumes more oxygen, higher temperatures, and therefore the acetylene-oxygen mixture increases the speed of operation. However, a gasoline-powered device does not experience a shortage of fuel, which can be obtained at any gas station, which in turn reduces the cost of transporting cylinders with other types of gas.

Gasoline is much more convenient to use as fuel instead of kerosene, since it provides better cutting quality and a higher speed of work. In addition, such fuel forms vapors much better; the device can be operated even at fairly low temperatures down to -20 ° C, which allows it to be used in almost any weather, in any season. Acetylene and gasoline units can be combined to save calcium carbide - the metal is heated with a gas cutter, while the actual cutting is carried out with a stream of oxygen and acetylene. For this purpose, there are even dual-flame cutters that allow you to alternately use both types of flame.

What is better: a gas cutter or a gas cutter?

You can compare tools for working with metal. You can understand which option is better by becoming familiar with the basic operating parameters of these devices. Let's look at the most important ones:

1. The petrol cutter cuts the material due to the rotation of the disk. Gas cutting results in the combustion of metal in a stream of pure oxygen.
2. Some types of products cannot be separated using a gas cutter; with a gas cutter, only thickness can become a problem.
3. In terms of weight, a gas-powered device wins, because the operator only has to hold the burner itself, which, due to its size, weighs little. The cylinder is on the floor.
4. For safety reasons, it is better to deal with a gas cutter. If you follow the operating rules, no problems should arise. Working with gas requires some special features regarding the placement of the cylinder and working conditions. In addition, interaction with gas is carried out with a welder’s mask.

What is a petrol cutter?

The tool is a self-contained yet compact circular saw equipped with a special rotating disk with a cutting edge. A petrol cutter is a device that, unlike its close relative, is capable of cutting hard rocks and materials. Thanks to the high speed of rotation of the disk, the tool can cut various products of impressive thickness in a short period of time. The main advantage is the possibility of use where there is no electricity. Today, the market offers household, semi-professional and professional models.

Petrol cutter device

When purchasing such a tool, it is important to understand that this is the most massive equipment, so special transport carts will be needed to use it. Regardless of the model, the main elements of the device are:

• frame;
• engine;
• chain drive;
• coated disk;
• lever;
• protective casing.

The cost of the product is directly related to the quality and size of the disc. Petrol cutters for metal are divided into groups for wet and dry cutting. In the first version, the device is additionally equipped with a casing with liquid supplied through special tubes to the material being processed and the disk. The cost of this equipment is much higher than those that do not have it.

The principle of operation of a gas cutter

The engine runs on a mixture of gasoline and oil. After switching on, the disk begins to perform rotational movements, due to which the desired surface is cut. To understand how to work with a gas cutter, it is worth knowing the features of these manipulations:

• the cutting depth is limited by the diameter of the disk;
• It is recommended to use a small sector when cutting;
• The gas cutter must be held at right angles to the surface being worked on;
• special wheels are used to cut different materials;
• Diamond discs are consumables that quickly deteriorate.

What can be cut and what is the cost?

Below is a table of fuel consumption using the example of a Vognik-182 gas cutter.

As you can see, the consumption is quite small. Therefore, even if you use a gas cutter as the main tool, and a gas cutter as an auxiliary one, you will definitely be able to save carbide.

Today, a gas cutter is not a very common tool. People treat it with distrust both because of its flammability and because of the difficulty in setting it up. However, the tool has its own niche. It is lightweight, compact, and works where a gas burner fails due to low temperatures.

How to choose the right gas cutter

All tools can be divided according to purpose:

• professional – designed for use 8 hours a day. They are distinguished by increased reliability and an expanded range of functions.
• household - used in a gentle mode for no more than one to two hours a day with breaks, they do not require too much engine power. Their prices belong to the lower price segment, their layout is minimal.

Gas cutters use two cutting methods.

Wet - uses water supplied to the protective casing to cool the cutting disc. The coolant reduces the level of air pollution from dust and contamination of parts, and the speed of the work process increases. This method allows you to increase the service life of the cutting disc and protect against the appearance of small cracks and dark spots on it. Such gas cutters belong to the highest price segment.

Dry – without using liquid to cool the cutting wheel. Therefore, after 40-50 seconds of work, it is necessary to take a break for 23-30 seconds to cool the cutting wheel. This slows down the work, but you can buy a model much cheaper.

Petrol cutter Stihl TS 420

In the class of semi-professional equipment, this model is considered the most convenient to use. It has a compact body, low weight (can be carried and operated with one hand) and reduced emissions (by 70%). The model also features a cutting abrasive disc - wear resistance and reliability. And the impressive power of the device maximizes its scope of application. The equipment is recommended for use in harsh operating conditions: increased loads, long-term continuous operation, cutting hard materials. Has standard equipment.

Advantages of Stihl TS 420 identified by consumers:

• ICE 2-mix. The gasoline unit at maximum loads shows excellent fuel economy - 20%. The peculiarity of the technology allows you to reduce costs.
• Air filter protection. The equipment uses a special cyclonic filter cleaning system, which simplifies the maintenance of the unit, increases the intervals between servicing and increases its service life by 45%.
• Ease of use. The unit can be used either manually or on a trolley. The kit with the gas cutter includes a set of keys for installation.
• Versatility. You can process granite and metal products/structures, concrete and asphalt in extreme conditions - rescue work, construction, dismantling of structures.
• High build quality. German technology has earned a reputation in the market for producing reliable and extremely safe equipment. This fact is confirmed by user reviews of the TS 420 gas cutter model.
• Disk protection. The manufacturer used magnesium disk protection.

• Ergonomic and balanced design. The correct location of adjustment buttons, handles, and gas tank caps ensure maximum comfort and safety in using the equipment.
• Excellent tool handling. Due to the balanced design, the unit is easy to operate, which guarantees precise and neat cuts.
• ElastoStart device. This is a trigger mechanism synchronized with the decompression valve and compensator. Working in tandem of these three components helps prevent oversaturation of the fuel mixture, which inevitably happens when the filter is significantly dirty.
• Anti-vibration mode. Ensures long-term operation of the operator with the device - hands do not get tired, preventing the development of occupational diseases.
• Belt tension system. A unique semi-automatic mechanism - unscrewing the proprietary clamping screws ensures automatic belt tension through a special spring assembly.

User-identified shortcomings of the Stihl TS 420:

• Difficulty replacing the filter. Many users note that the innovative filtration system does not provide for independent replacement of elements.
• Uncomfortable working with the unit on a trolley.
• The body is made of low quality materials.

A fairly large percentage of consumers noted the high build quality of the unit and the external elements of the housing that are unstable to mechanical loads. The equipment requires careful handling. Reviews also indicate the durability of the equipment - the service life without the need for repairs is (based on reviews) 1.5-2 years. There are some complaints regarding difficulties with servicing the machine. A small percentage of consumers indicate that equipment requires regular professional maintenance. According to other criteria, users called the unit powerful and functional equipment.

Video review of the Stihl TS 420 gas cutter:

Advantages and disadvantages

The special equipment market offers both models with an evaporator and spray-type gas cutters. However, there are a number of reasons to believe that a spray cutter is better. Namely:

• Spray cutters have up to 50% less weight compared to evaporative cutters, because there is no asbestos chamber and additional heater
• A sprayer is easier to maintain than an evaporator, because no need to clean the evaporation chamber
• The gasoline spray cutter heats up less. Due to the additional heater, the evaporative type cutter must be cooled during operation
• The evaporator is not suitable for operation at low temperatures due to the constant cooling of the vapor. (In winter, it is better to use a spray cutter)
• The atomizer, unlike the evaporator, is resistant to flame backlash.

Operating principle and main types of cutters

There are two main types of gas cutters. Their fundamental difference is in the method of fuel supply:

• Petrol cutter with evaporative torch
• Petrol cutter on sprayer

In the first case, a chamber filled with asbestos is built into the burner. When fuel is supplied to it, an additional burner heats up the asbestos shell and evaporation occurs.

In the case of an atomizer, fuel is supplied under pressure through a narrow nozzle. It sprays gasoline, which, passing through the mouthpiece, evaporates.