Comparison Svityaz ShN 1812 vs Vorskla PMZ 18N

Torque is the maximum force with which this model is capable of turning the working nozzle.

Higher torque gives more options, it allows you to cope with complex tasks such as drilling in hard materials, unscrewing stuck screws and nuts, etc. On the other hand, a lot of force requires corresponding power — and this, in turn, affects the dimensions , weight and cost of the tool itself, and also puts forward increased power requirements (mains power, battery capacity or pressure / compressor performance). And for some tasks, excessive torque is basically unacceptable, so for maximum versatility, it is desirable to have torque control — and this affects the cost even more. And the more steps, the more optimally you can configure the tool to perform a particular type of work. So the general rule is this: when choosing, it is worth considering the specifics of the planned work, and not chasing the greatest working effort.

Detailed recommendations on choosing the optimal torque for different types of tools (see "Device") can be found in special sources. Here we note that it is of key importance primarily for screwdrivers, although it is also given for other types of tools. At the same time, in the “weakest” models, the maximum working force does not exceed 15 Nm, in the most powerful ones it is more than 150 Nm.

The total weight of the tool is usually the device itself, without attachments. For battery models (see "Power Source"), usually, the weight is indicated with a standard battery installed; for battery-powered models, the weight can be given both with and without batteries, but in this case this point is not particularly important.

Other things being equal, less weight simplifies work, increases accuracy of movement and allows you to use the tool for longer without tiring. However, note that high power and productivity inevitably increase the mass of the tool; and various tricks to reduce weight increase the price and can reduce reliability. In addition, in some cases, a massive design is more preferable. First of all, this applies to work with a large load — for example, drilling holes of large diameter, or making recesses with impact: a heavy tool is more stable, it is less prone to jerks and shifts due to uneven material, vibration of mechanisms, etc.

It is also worth noting that specific weight values are directly related to the type of tool (see "Device"). Screwdrivers are the lightest — in most of them this figure does not exceed 500 g. Screwdrivers and drill drivers are more "heavy": their average weight is 1.1 – 1.5 kg, although there are many lighter ( 0.6 – 1 kg) and heavier ( 1.6 – 2 kg or more ) models. And clas...sic drills and wrenches have the greatest weight: such a tool must be quite powerful, so for them 1.6 – 2 kg is an average, 2.1 – 2.5 kg is above average, and many units weigh more than 2, 5 kg.

The largest diameter of holes that the tool can make when drilling with a conventional drill in wood.

The larger the hole diameter, the higher the resistance of the material, the more power the tool must provide and the higher the load on it. Therefore, the maximum allowable drilling diameter must not be exceeded, even if the chuck allows you to install a thicker drill bit — this can lead to tool breakage and even injury to others.

It is worth noting that some types of wood can have a fairly high density, and for them the actual allowable drill diameter will be, accordingly, less than the claimed one. However, this is true mainly for exotic breeds, which are extremely rare in our area.

The number of batteries supplied with the respective tool (see "Power Source"). Also, this paragraph may indicate the presence of a built-in battery.

The most popular configuration option with a battery nowadays is 2 batteries. This provides additional benefits that are especially useful for long-term continuous use of the tool. So, when the charge of one battery is exhausted, you can quickly change it to another; while one battery is in use, the other can be charged. This minimizes or eliminates interruptions in charging. Some tools for the same reasons can be equipped with three batteries, however, such sets are much less common, since they are more expensive and do not have fundamental advantages. Single battery kits are also not particularly common: these are mostly entry-level tools designed for small amounts of work, when charging breaks are quite acceptable.

In addition, quite a few modern cordless tools come without batteries. This configuration assumes that the user himself will purchase batteries at his discretion (many models are compatible with several brands of batteries at once). In addition, this option may come in handy in case the battery is already on the farm. This happens quite often, since many well-known manufacturers use universal bat...teries suitable for different types of branded power tools. So a battery, for example, from a previously purchased jigsaw or grinder may well be compatible with a screwdriver from the same company.

As for non-removable batteries, this is a rather rare and specific option. Such tools are as compact as possible, but the batteries themselves cannot be quickly changed — so you will inevitably have to take breaks for charging during work. Therefore, this method of supply is typical for low-power tools — mainly screwdrivers (see "Device"). In them, small size is more important than a long period of continuous operation, in addition, a low capacity allows you to achieve good battery life even with small sizes (and, accordingly, capacity) of batteries.

The capacity of the battery supplied with the respective tool (see "Power Source"). The most modest capacity values in modern power tools do not even reach 1 Ah, such batteries are found mainly among electric screwdrivers(see "Device"). And in powerful professional models there are batteries for 3 – 4 Ah and even more.

Theoretically, the higher the capacity, the longer the tool will be able to work on a single battery charge. However, in fact, things are far from being so clear cut. First, the ampere-hour is a fairly specific unit; its features are such that only batteries with the same voltage can be directly compared by the number of ampere-hours. With a difference in voltage, you need to convert the capacitance to watt-hours and use them for comparison. Secondly, the actual battery life of the tool depends not only on the properties of the battery, but also on the power consumption and other performance characteristics. Thus, it is possible to compare different models in terms of battery capacity only with the same supply voltage and similar capabilities.

Method of attaching the battery to the tool.

— Clip. With this fixation, the battery is fully or partially inserted into the handle of the tool — like a clip (magazine) of a pistol, hence the name. This method is convenient in that when installing the battery, there is a minimum of unnecessary parts outside; and small low-power batteries can completely hide inside the case without affecting the dimensions of the tool. On the other hand, for powerful and capacious power supplies with significant dimensions and weight, the clip-on mounting method is poorly suited for a number of reasons. Therefore, this option is found much less often than sliders, and mainly among low-power instruments.

— Slider. This method involves the use of special guides — a kind of "sled" along which the battery moves during installation and removal; such "sledges" are usually placed at the bottom, at the end of the handle. The slider is suitable for batteries of almost any size and weight, including the most powerful and heavy batteries used in power tools. In addition, it does not have such severe restrictions on the shape of the battery as a clip-type mount. So most modern cordless tools use sliders, and for medium and high power units, this option is almost standard. Its disadvantages include perhaps the moment that the installed battery is located outside the tool and somewhat increases its dimensions. However, t...his point most often turns out to be unprincipled — especially for powerful and heavy devices that are initially quite large.