Cordless Impact Wrench: technical specifications

The appearance of electric wrenches on the market caused mixed reactions from specialists. On the one hand, the additional power action significantly facilitated the working process of screwing and twisting, on the other hand, binding to the network itself limited the operation of the tool. This problem was solved by the integration of separate power supplies. Modern cordless impact wrenches are able to work in isolation from the outlet for several hours in continuous mode. But this is not all the advantages of this tool, which differ in different ways depending on the model and the manufacturer.

The device of the battery nutrunner

The design is usually formed by the following set of components: a battery pack, a handle, a body base and a chuck. Inside, there is a working technical stuffing, on which the operational capabilities of a particular model depend. As an optional addition, the instrument can be provided with LED backlight, auxiliary handle and other retention devices. At the same time, almost every modern model is equipped with ventilation holes.

As for the power supply system, the battery-operated impact wrenches are most often powered by lithium-ion batteries. Although there are also models with a universal principle of battery charge, which allow the use of nickel-cadmium elements.

Features of impact wrenches

A few years ago, a light, hand-held power tool did not at all suggest the principle of percussion. Such an opportunity was originally allocated to the perforators, but this was their natural functional ability to destroy solid materials. In the wrench there is a somewhat different principle of impact action. During operation, the rotation is not performed with a constant and uniform force, but with jerks that do not act in a straight line in the direction of screwing, but in the direction. This function provides a more efficient workflow, facilitating the physical strain of the operator's wrist.

Of course, the nature of impact may differ from one model to another. For example, the Bosch cordless impact wrench already in the models of the initial segment provides a frequency of 3000 beats per minute, and in families of little-known manufacturers this indicator can only correspond to flagship versions.

Main technical characteristics

The main indicator, which speaks about the power capabilities of the tool to work with nuts, is the limiting torque. Budget low-cost versions usually have a torque of 100 to 300 Nm. This is quite enough for domestic repair work, but it is advisable to provide a specialist with a similar parameter of at least 500 Nm to a specialist who faces various, including problematic, fasteners. By the way, premium modifications provide and more than 700 Nm, but this is already a professional segment.

Also, cordless impact wrenches are characterized by the voltage of the supply unit. This value varies on average from 9 to 18 V. Accordingly, this indicator will also affect the performance of the instrument. In addition, it is worth noting the weight of the device. From the point of view of the effectiveness of the workflow, massive and heavy models are more profitable, but the hand becomes more tired from them. Lightweight low-power wrench drivers usually weigh no more than 1 kg, and professional devices - 3-4 kg.

Characteristics of the model TW100DZ from Makita

This is an entry-level model designed for typical simple operations. Voltage 10.8 V, as well as torque of 110 Nm, of course, will not allow the operator of this version to work with large and rusty hardware, but it has another purpose. The Japanese tool, rather, is suitable for accurate accurate operations when performing finishes or for working in difficult places. Weight 950 g and small size just give the user the ability to perform tightening in tight conditions. Also the Makita rechargeable impact wrench in this version is provided with useful functional additions. In addition to impact, the model offers the operator backlight, reverse and speed adjustment.

Characteristics of Ryobi ONE + R18IW3

This model can be attributed to universal wrench, due to its balanced characteristics. The device absorbed the best performance of domestic and professional models, but, of course, with certain limitations.

The wrench with a weight of 1.5 kg is supplied with a battery pack with a voltage of 18 V, provides an output of 400 Nm in torque. As you can see, the basic characteristics of the model make it both easy and productive. These qualities, by the way, are confirmed by user feedback. The impact wrenches battery in this version has another advantage - the ability to work with batteries of two formats (Ni-Cd and Li-lon). At the same time, the presence of an intelligent power supply monitoring system makes it possible to efficiently use each segment of the battery cell with an increase in power output by 10%.

Specifications of the Bosch GDS 18 V model

This option can in all respects be called advanced. First, the model has a battery voltage of 18 V, which allows it to realize an operating torque of 650 Nm. This is enough not only to work with large nuts, but also to cope with old, rusty and deformed fasteners. In this case, despite the impressive power filling, the Bosch GDS 18 V rechargeable impact wrenches have a light weight of 3 kg. Of course, against the background of household devices this is a lot, but professional devices with similar power often weigh 1-2 kg more.

Also, the features of the German wrench are battery elements with the innovative CoolPack system. Its essence is to ensure the optimal removal of heat flows, which as a result affects the increase in the resource of the element base.

Characteristics of model ACD144G Premium from Hammer

One more attempt in one model to combine the possibility of performing professional tasks, while not losing the advantages that the devices for home use possess. With regard to performance, it provides an average voltage of 14.4 V and also not an impressive torque of 135 Nm. On the other hand, with a modest power potential, the device received a lightweight body of 1.5 kg, a capacitive NiCd-type battery and the presence of metal components in a housing base. By and large, the Hammer ACD144G Premium cordless impact driver can be considered as a universal model, but only with a correction for the average power that will not allow performing heavy power tasks with fasteners.

Price issue

The range of prices is very extensive, which is due to differences in the characteristics and functional characteristics of the apparatus. For example, the model reviewed by Makita is available on the market for only 3-3.5 thousand rubles. Perhaps, this is one of the cheapest variants of a wrench with a shock function. Then follows the category of average power models. It can be attributed to the battery shock gyrokover Hammer ACD144G, as well as the performance of ONE + R18IW3 from Ryobi. These devices are available for sale on average for 6-7 thousand. As for the higher segment, in which the German instrument is also presented in the modification of GDS 18 V, the prices are in the range of 20-30 thousand.

Conclusion

Manufacturers of power tools make a lot of efforts to develop new technologies that improve the quality level of their products. As a result, both basic performance indicators and optional additions increase. In turn, the user faces a difficult task of choosing the optimal model. Virtually all battery shock impact wrenches in modern form are able to cope with most of the fastening tasks. However, not all of them can be used as a universal tool.

The household model is hardly suitable for working with screws, tightly twisted into a solid rigid base. And, on the contrary, a professional powerful device will not be suitable for performing serial twisting of small fasteners. Therefore, in each case of choosing a wrench, first of all it is necessary to start from the conditions in which the tool will be used.