Comparison DeWALT DWE7491 vs DeWALT DW745

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 angle at which the working part of the saw can be tilted relative to the vertical. It can be indicated not only for stationary tools, but also for manual ones — in the event that the design provides for a support platform. It is worth paying attention to this parameter if you have to deal with oblique cuts: making such cuts by setting the saw to a certain angle is much more convenient than adjusting this angle manually.

Electronic motor protection in a saw controls the load on the motor and helps protect it from overheating, overload, or damage. If the tool is operating in a mode that is too heavy, the system can limit power, shut off the engine, or prevent it from overheating. This is beneficial not only for user safety but also for extending the lifespan of the saw itself. For example, when cutting dense wood, wet timber, or during long continuous work, such a feature helps avoid costly breakdowns.

The noise level produced by the saw during operation. Note that this parameter is rather approximate, because in fact, the “loudness of the work” depends not only on the tool, but also on the material being processed and the characteristics of the environment. Nevertheless, the data given in the characteristics make it possible to assess the comfort of working with the tool. The lower this indicator, the less discomfort the noise will cause, and at high values, even special hearing protection may be needed.

Note that the noise level is usually measured in decibels, and this unit is not linear: for example, a difference of 3 dB corresponds to a difference of 2 times, 10 dB — to 10 times. Therefore, it is easiest to evaluate the noise level using comparative tables. Here is a simplified version of such a table for the range in which modern saws operate:

70 dB — loud conversation of several people in close proximity;
75 dB — a cry in the immediate vicinity;
80 dB — truck engine, mechanical alarm ringing;
85 dB — loud scream;
90 dB — freight car at a distance of 7 – 10 m;
95 dB — subway car at a distance of 7 – 10 m;
100 dB — industrial shop;
110 dB — tractor engine;
120 dB — demolition hammer, thunder from a close lightning strike (pain threshold of auditory perception).

The size of the desktop provided in the design of the tool.

The working table is called the plane on which the workpiece is placed; it is found exclusively in stationary saws (see "Type") — in particular, circular and combined (see "Device"). The larger the desktop, the more convenient it is to use a saw with large materials; on the other hand, this nuance directly affects the dimensions of the tool.

General dimensions of the saw. For a stationary tool (see "Type"), this parameter determines primarily the amount of space that will be required for installation; problems with this can only arise in very tight spaces, so in most cases the dimensions of a stationary saw do not need to be given special attention. In the case of hand-held models, the small size makes it easier to work in hard-to-reach places and improves overall usability. On the other hand, a compact tool inevitably turns out to be low-power; and some jobs by definition require large, heavy saws, with large bar lengths or blade diameters.

The total weight of the tool. For petrol models (see "Power Source"), usually, dry weight is indicated, excluding fuel.

In general, it makes sense to pay attention to this parameter primarily when choosing a hand tool. At the same time, note that higher power, a more capacious battery or a capacious tank will inevitably affect weight. However, tools with similar characteristics can and do differ markedly in weight. And here it is worth considering that a lighter model will be more comfortable to work with, but weight reduction may affect reliability and/or cost. In addition, a more massive tool is more stable, it is not so prone to jerks under uneven loads. If we talk about specific numbers, then a weight of 3 kg or less is considered very light, 3–5 kg is relatively small, 5–7 kg is medium, 7–10 kg is significant, and some powerful tools (mainly gasoline) weigh and over 10 kg.

As for stationary saws, weight is of secondary importance for them — it mainly affects the ease of transportation.