Comparison Metabo TS 254 M 610254000 vs Metabo MKS 18 LTX 58 600771700

— Portable. Hand tools designed to hold on weight during work. The main advantage of such saws, in accordance with the name, is mobility and ease of carrying from place to place. In addition, such a tool can "climb" into hard-to-reach places, as well as work with parts that cannot be brought to a stationary saw. On the other hand, portable units are more demanding on the skills of the operator, require increased caution, and are also less suitable for long-term work — holding the tool on weight for a long time can be very tiring. Portable, by definition, are all chain and reciprocating saws, as well as gas cutters and "alligators"(see "Device"); in addition, many disk units and some tape ones belong to this type.

— Stationary. Saws that have a stand and are placed on the floor, workbench or other similar surface during operation. Such tools are much larger and heavier than portable ones, they are designed to be permanently in one place and do not require frequent carrying. On the other hand, stationary saws are more convenient to use than portable saws, they are less tiring and more accurate. In addition, the design of such units may include stops, rulers and other devices for additional convenience of sawing (including cutting at an angle). Stationary are all miter, cutting, combined and radial-cantilever saws (see "Device"), as well...as many circular and most band saws.

By type of power source, all modern saw can be divided into electric and gasoline. The common difference between them is that electrical units are more compact and lighter, less noisy, easy to maintain and do not produce exhaust gases, so they can be used indoors without restrictions. Petrol tools, in turn, combine high power and independence from power grids, but they are heavy, bulky, more difficult to operate and repair, more expensive (both in terms of their own cost and fuel price) and are generally designed for use outside premises. Therefore, most modern saw are made electric, which in turn can use different types of power:

- Power supply (230 V). Connection to a standard 230 V household network, in other words, a regular socket. This option can be used both in portable saw and in stationary tools of relatively low power (up to 3.5 kW). There are sockets almost everywhere where there is electricity at all, and the operating time of such units is almost unlimited (as long as there is voltage in the network). The main disadvantage of such a power supply is the presence of a power cord that does not allow you to go far from the outlet (and with a portable tool, you also have to make sure that the cord does not get under the canvas).

- Power supply (110 V). Tools powered in the American and Japanese manners - from power networks with a voltage of 110...V. Power tools with such an operating supply voltage are produced for the market of North and Central America, the Land of the Rising Sun, Saudi Arabia. Also, 110 V power grids are found in the UK. To avoid tool failure when connected to standard 230 V household networks, you will need an additional link in the face of a step-down transformer or a special 110 V converter.

- Power supply (400 V). Powered by a three-phase power supply with a voltage of 400 V. Such power is suitable even for high-power saw, but it is far from being available everywhere - basically a three-phase connection is available in workshops, workshops and other industrial premises. Therefore, this option is found exclusively in stationary tools (see "Type") of high power, for which a conventional socket is no longer enough.

- Accumulator. Powered by own battery. The main advantages of this option are mobility, the ability to work independently of sockets and the absence of a power cord that can interfere with work. On the other hand, such a power supply is not suitable for high-power saw, other things being equal, a cordless tool turns out to be noticeably heavier and more expensive than a mains one, and the operating time is limited by the battery charge. However, in most cases, the battery is made removable, which allows you to keep several batteries ready and change them as needed.

- Battery / power supply (230 V). Tools that allow two power options - from an outlet and from its own battery. See above for more details on each option, and their combination makes the saw as versatile as possible. So, if there are sockets nearby, you can work from the network, saving battery power (or even recharging it in the process), and if there is a problem with the sockets or the network cable interferes with work, you can switch to the battery. On the other hand, such versatility affects the price, and the tool itself still turns out to be more cumbersome and heavy than a purely network one.

The location of the motor in the electric portable saw (see "Type").

- Longitudinally. The longitudinal arrangement allows you to achieve a good balance, allowing you to work comfortably in different positions; this is especially true for cutting branches from trees and other similar work, where the cutting plane can be located at different angles. In addition, such a tool has a smaller width and a longer length, which can make it easier to work in hard-to-reach places. On the other hand, such saws are more expensive than cross-cut saws.

- Transversely. The transverse arrangement of the engine slightly worsens the balance compared to the longitudinal one and makes it difficult to saw along an inclined plane, at an angle to the vertical. In addition, the length of such saws is noticeably shorter. However, for the simplest work with sawing from top to bottom, they are no worse than longitudinal ones, but they are much cheaper. Yes, and a small length in some cases can also be a virtue.

Saw motor power in watts. For petrol tools (see "Power Source"), horsepower is additionally indicated, see below for details.

The higher the power, the better the tool is suitable for voluminous work and hard materials, the greater the depth of cut it can provide and the easier it can cope with significant loads. In addition, for different types of saws and different types of materials, the actual power values \u200b\u200bcan also be different. For example, a power of 2.5 – 3 kW is actually the limit for chain saws, but in chain saws this is an average figure, among such tools there are models of 3 – 4 kW and even more. Detailed selection recommendations for various cases can be found in special sources.

The maximum speed of the disk, provided by a saw of the appropriate design — disk, cut-off, etc. (see "Device").

Note that most of these saws use gearboxes, so that the blade revolutions are much lower than the engine revolutions (see above). This achieves an increase in torque, which in the case of saws is often more important than the high speed of the blade.

As for the specific number of revolutions, it is first of all worth noting that only saws with the same disc diameter can be compared according to this indicator. In these cases, higher speeds provide better performance, but the trade-off is reduced torque; such saws do better with relatively "light" materials. Conversely, low speeds reduce productivity, but allow the blade to effectively "bite" even into dense, stubborn workpieces. More specific recommendations regarding the choice of a saw according to the number of revolutions of the blade can be found in special sources.

The largest tyre size (in chain saws) or disc (in circular saws and some others, see "Device") that is allowed for this tool. Tyres are sized by working length, rims by diameter.

A larger bar/wheel allows for deeper cuts but requires more powerful motors. Therefore, this parameter cannot be exceeded — this can lead to an overload of the engine with all the corresponding troubles. However, in many models with a disc it is physically impossible to install a nozzle with a diameter larger than the maximum allowable.

Also note that saws with similar bar/blade sizes may differ in maximum depth of cut (mostly due to differences in design or power). As for the specific dimensions, they depend on the type of saw (see "Device"). For example, large discs of 450 – 500 mm are found exclusively in stationary chain saws, the maximum figure for cutting models is 400 – 450 mm, for trimming — 300 – 350 mm, and sizes of 500 – 550 mm or more clearly indicate that speech It's about a chainsaw chainsaw bar. Detailed recommendations regarding the choice of a tool for a given size can be found in special sources.

The diameter of the mounting hole for which the blade holder in the saw of the corresponding design is designed (see "Device"). In fact, this paragraph indicates the diameter of the axis on which the disk is installed — this size should correspond to the hole in the disk itself.

Note that some models of saws allow the installation of discs with larger holes than indicated in the specifications — when using an adapter sleeve. The main thing is that the own diameter of the disk does not exceed the values \u200b\u200ballowed for this model (see "Tyre / disk diameter"). Popular sizes include 20mm, 25mm and 30mm.

The greatest depth of cut provided by the saw.

In most types of saws (see “Device”), the depth of cut directly depends on both the engine power and the size of the tyre / disk. The specifications give a value for the maximum allowable size of the working nozzle; when using nozzles of a smaller size, the depth of cut, respectively, will be less. But in band saws, this depth is rather weakly related to the actual length of the tape — it is determined primarily by the length of the open section of the tape, which is directly involved in the work.

Anyway, the greater depth of cut makes the tool more versatile, but comes at the cost of weight, price, and electricity/fuel consumption. So when choosing, it is worth considering the real features of the planned work and the dimensions of the workpieces that are planned to be cut. As for specific values, the most modest tools provide a depth of up to 50 mm ; 50 – 75 mm is considered a low indicator, 75 – 100 mm is average, 100 – 125 mm is above average, 125 – 150 mm is already quite an impressive thickness, and the most powerful modern saws can have a cutting depth of more than 150 mm.

Maximum cutting depth achieved when sawing at a 45° bevel.

This feature is indicated only for those models that are originally designed for sawing at an angle — for example, due to the special design of the attachment for the blade / blade (in stationary models, see "Type") or due to the inclined support platform (in manual) . The maximum angle of inclination of the saw in such models can be different (see below for more details), however, 45 ° is considered the standard option, so it is for this inclination that data on the depth of cut is given.

The general meaning of this parameter is quite obvious. On the one hand, a greater depth of cut allows you to cope with thicker workpieces and generally gives you more options; on the other hand, an increase in depth requires an increase in the size of the disk / canvas and an increase in power, which, accordingly, affects the price, dimensions and consumption of electricity / fuel.