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The best cordless drills and screwdrivers
Among the tools used to work and spread the world, screwdrivers and drills may not be missing in any toolbox that respects, whether for small household chores or large-scale works. During the last years these tools have had a great evolution that has seen the addition of numerous functions in support of the one of screwing and of basic drilling course. Many screwdrivers for example allow to change the rotating speed of the spindle, increasing the speed up to even make possible the drilling of wooden surfaces. Another function now very common in the best screwdrivers is that of reversal of the direction of rotation, with the user who can then not only unscrew screw but also with the push of buttons or mechanical levers.
The main types of screwdrivers
There are numerous models of screwdrivers, but all can be grouped into two broad categories, cordless screwdrivers and screwdrivers, the first perhaps less expensive than seconds but less flexible. The electric screwdrivers in particular, have as a point of strength their power, much higher than that offered by the versions of cordless screwdrivers, and also have a more robust body. This latter feature makes these the most reliable versions of the battery versions as better able to withstand shocks and wear, ensuring excellent performance in all possible usage scenarios. But the flaw of having a more and electrical connection near the workplace makes electric versions less flexible and in some cases less easy to use than the battery powered versions. The cordless advantage in most cases nickel cadmium batteries or lithium batteries, and even though they are less efficient and robust electric versions, are preferred by many users for the flexibility provided by the complete tool autonomy. In addition, these tools are also usually two different operating speeds, a key factor that allows this tool to adapt to different situations.
The most powerful screwdrivers
We divided artisans in the beginning of our article, the detectors and the drills according to the presence or otherwise of a battery. Among the tools it is also possible, however, to find another broad category, that of air screwdrivers for though at very demanding jobs. In fact, this category includes impact wrenches and linear, however, both large and can reach up to 650 nm for couples, a high value that makes them perfect for those jobs where you need to go to work fighting even very high torsional forces . Among the substantial differences between the despotic air and those "conventional", perhaps the most relevant for the mechanics with which these devices operate and very different in the two cases. If fact in conventional rotation occurs continuously and tirelessly, in those impulse that is carried out in small consecutive shots that together describe the complete rotation. instead perfect for those who make compact the main characteristic for the right screwdriver, the linear devices offer this in addition to a non-reduced length of the device. They are usually powered by compressed air, are like incredibly compact said than any other model cordless electric or battery and guarantee an excellent degree of efficiency even in confined working environments and not particularly comfortable.
The parameters to be considered
Choosing the best screwdriver it is never taken for granted because it must take into account a significant amount of aspects, all equally fundamental and important to avoid being left then with a little handy device if not unfit for work that you are going to play. Among the features still to be analyzed with the utmost care, those of greater importance are certainly the weight, the voltage, the number of revolutions per minute and the variable rotation speed, but let's see in more detail in order to understand why they are so important for the user.
- The weight is perhaps the first feature that is associated with devices in its class. Screwdrivers and drills have always been associated with very robust devices and therefore heavy. In the standard it is good to choose a low weight device, perhaps to below 2kg in order to facilitate the calibration of the trend in the use phase. Very useful in this context are the non-slip handles, which in combination with a low weight allow to obtain precise work and without burrs.
- The number of revolutions per minute: should not be below the 1000, since below this threshold would not be able to guarantee a precise work.
- The voltage is the last aspect that often you are to analyze, albeit covers a fundamental role. The voltage should be higher than 12 times in the output, sometimes penalized with avvitatoti battery and which must be equipped with powerful lithium batteries. In principle, however, it is possible to fall below the threshold just indicated would be even more desirable not to fall below the minimum threshold of 9 volts, worth a poor job.
- The variable rotation speed: at least two different speeds to choose, so that we can adapt to different working requirements.
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