Manual mechanical tools are good in many ways, but their main advantage is independence from power sources. Such devices are autonomous and easy to handle, but not always muscular strength is enough to perform work operations. A power tool comes to the rescue in such situations, which also has serious drawbacks in the form of energy costs and attachment to the outlet. If the matter concerns simple mechanical operations, then a set of pneumatic tools, which also includes wrenches, will be a way out. These are compact and ergonomic devices, through which you can perform almost all the work associated with the maintenance of fasteners.
The principle of operation of a pneumatic tool
Like all pneumatic tools, this type of wrench needs to be connected to a compressor, from which an air stream of sufficient force is supplied. By the time this feed is activated, the user must place a nozzle on the fastener. Then you can activate the trigger tool. Through the hose, an air stream will be supplied to the device and start the rotation of the rotor mechanism. Rotational movement will act on the spindle, due to which the pneumatic impact wrench will screw the fastener. Thus, it is possible to easily maintain screws and bolts not only in the direction of tightening, but also in reverse. The power of pneumatic tools can be different, but, as practice shows, even average models in terms of productivity are able to carry out operations in a few seconds. In terms of efficiency, such devices are practically not inferior to battery and network analogues, but at the same time they are smaller, which increases their ergonomic advantages. Another thing is that for the full operation of the device requires a compressor.
Features of shock models
Most wrenches of this type operate with an impact mechanism. This means that the rotational action is accompanied by power impulses, increasing productivity. By intensively acting on the head of the fastener, even rusted bolts can be removed. In simple domestic operations, perhaps the percussion mechanism will be superfluous, but in repair shops, tire shops and car services, additional effort is simply necessary. In addition, there is a whole group of massive fasteners that, even with a normal fit, do not unscrew without impact.
But it is important to consider another aspect. The fact is that it is advisable to carry out neat actions with small fasteners with a shockless tool. Firstly, it will not damage the head of the part, and secondly, its efforts will be quite sufficient to service a small hardware. As a rule, a pneumatic impact wrench is used in work with fasteners whose diameter exceeds 24 mm. In order not to break the thread, in other cases it is better to use shock-free models with optimal tightening force.
Main characteristics
One of the main performance characteristics of this tool is the tightening torque. It would seem that the higher this effort, the wider the range of possibilities for using the device. However, too much tightening torque can damage the threads. Depending on the model, it can vary from 30 to 3000 Nm. For example, for a tool for nuts on automobile wheels, this value is 100 Nm. Help in choosing models for this indicator will also have idle speed, which are compared with the requirements for servicing specific wheels. In particular, a pneumatic impact wrench provides up to 8,000 rpm. But this parameter should not be limited. If the seats do not match, then the optimally selected force will not help in the work. Usually for cars use a tool with a landing diameter of half an inch. This means that the wrench can loosen the bolts 25 mm. If we are talking about 32 mm screws, then it is worth buying a tool with a 3/2 inch diameter fit.
Compressor connection
A source of compressed air is necessary in the operation of a pneumatic tool, and it should also be selected for specific characteristics. In this case, two parameters must be taken into account: air flow and working pressure. It is not at all necessary to correlate these values with the screwdriver data directly. The main thing is that the compressor has indicators that exceed the similar characteristics of the main tool. Actually, entry-level models already differ in modest performance, however, pneumatic impact wrenches for mounting or servicing the assembly shop need a more efficient compressor. A well-organized relationship between the two devices will ensure uninterrupted and safe operation.
Bosch Models
Bosch is well known for both pneumatic tools and compressors, so you can make a comprehensive purchase in the assortment of this brand. With regard to product quality, users of this tool note a wide range of components, reliability, loosening efficiency and optimal cost. So, if you need a pneumatic impact wrench, the price of which does not exceed 5 thousand rubles, then it is worth turning to Fubag models - on the Russian market, the company offers quality modifications for 3-4 thousand rubles. In this case, you must immediately prepare for original ergonomic solutions. Although the tools are reliable, some users point to their non-standard fit in the hand, which takes a lot of getting used to.
Pneumatic Wrench Sumake
By the criterion of the ratio of power and price, users put the products of this brand in one of the first places. It should be noted that the models are not cheap, and their average cost is 10-15 thousand rubles. For this amount, the master gets the opportunity to conveniently adjust the tool even in mittens, high productivity and a stylish look. What is especially important, the Sumake pneumatic impact wrench surpasses even electric models in the same price range in terms of force. Also, craftsmen appreciate the small size of such models, which favorably affects the functionality and ease of use.
Eastwood Models
If the requirements for power and reliability are not in the first place, then it makes sense to purchase an inexpensive, but convenient tool manufacturer Eastwood. The devices of this line are used in everyday tasks, since they can not cope with professional-level operations. An important advantage is the cost at which a pneumatic impact wrench is sold. The price is in the average corridor from 2 to 3 thousand rubles. Users note the presence of a weak duralumin alloy and etching of the air during operation, but if you plan to service standard bolts with small sizes, then the characteristics of Eastwood tools will be quite enough.
How to choose the best pneumatic wrench?
The device itself and the performance of such equipment require special use. This should be either working with hardware in regular mode, or performing operations in difficult conditions. If, for example, actions with automobile and large factory screws are expected, then you should pay attention to the appropriate footprint format and power characteristics. For universal tasks, a set of pneumatic tools is suitable, which will allow you to perform a number of installation, finishing and other operations. The kit may also include spray guns, blowers and other devices that are often used in car services.
Conclusion
For those whose work is related to the regular maintenance of bolts, screws and other rolling hardware, it makes no sense to use mechanical keys. A special tool with a driving force allows you to save time on such actions and at the same time maintain the physical condition of the fastener. Of course, a pneumatic impact wrench is not the only solution to such problems. But he has several fundamental advantages: light weight, safe operation and optimal performance. If we talk about the shortcomings, then the first thing worth mentioning is the need to purchase a compressor, which will provide the same effort in the process of doing the work.