Percussion screwdriver: I twist-twist, I want to help you

Mechanical and locksmith work can be ordinary, urgent and extreme. When the turn comes the last, masters, as a rule, swear on what the light costs. For this is a problem that you can not solve so simply, and you can also ruin an instrument.

For examples, it is not necessary to go far. Rusty screws and screws can not be unscrewed with a simple screwdriver without risk either ripping off the bonnet or ditching the sting and thereby damaging the tool. Another "abusive" case is the twisting of a highly corroded steel bolt from an aluminum part (and the pair "steel-aluminum" is known for its "love" for mutual boiling). It would be nice to warm the bolt, but you can not do this with every detail ...

However, in the arsenal of the locksmith there is a tool that can cope with the above problems: a shock-rotary screwdriver. Its very name explains the principle of action: the transformation of the shock-forward motion into a rotational motion .

Already the appearance of this tool inspires respect. The impact screwdriver has a chrome-vanadium alloy reinforced metal case several times larger than its "sister", and is designed for hammer blows. Actually, the dimensions of the case with the notches are made in such a way that the screwdriver can be kept inoperative during operation.

The main "actor" is a bit, or nozzle, with which the impact screwdriver transmits the energy of rotation. The nozzles, as a rule, come with it in the kit or are purchased separately. They are of two types: with a flat sting and cross-shaped. Nozzles are inserted into the connecting part of the square shape. On it, you can also fix the end keys. This allows you to use a tool for working with bolts and nuts, which is especially convenient for car mechanics.

For a shock screwdriver to be truly universal, it must have a reverse function. This is realized by the direction switch, which allows the screwdriver head to rotate with the nozzle clockwise and counterclockwise. The reverse function, firstly, allows the tool to be used also for the tightening of the bolt-screw or other fasteners, and secondly, acting on the connection in the "twist-twist" mode, you can release the most hopeless bolt.

In how to use a shock screwdriver, there is absolutely nothing complicated. It is enough to set the desired direction of rotation on it, take it in the non-working hand, insert the tip of the nozzle into the slot of the screw / screw (or put the key on the head of the bolt) and strike with a hammer on the screwdriver's end. To her body does not slip in the palm of your hand, she should be in the glove. The impact, combined with the rotation, rusts the rust on the screw. Once it is free and turns a few degrees, you should use the reverse function and make a few strokes. This should further free the thread of the fasteners from rust. The subsequent reverse in most cases finally turns out the attached bolt or screw.

The shock screwdriver has long and firmly established itself in the tools of large and small shops, at the maintenance stations of motor vehicles, in locksmith's workshops and in boxes of household craftsmen. The most perfect and high-quality samples, made almost always in Germany, do not have other reviews, except excellent ones.