Mechanical and locksmith work is ordinary, urgent and extreme. When the turn of the latter comes, the masters, as a rule, swear at what the world is worth. For we are talking about a problem that cannot be solved so easily, and even the tool can be ruined.
You don't have to look far for examples. It is impossible to unscrew rusted screws and self-tapping screws with a conventional screwdriver without the risk of either tearing off the hat or ruining the sting and thereby rendering the tool unusable. Another "abusive" case is the unscrewing of a heavily corroded steel bolt from an aluminum part (and the steel-aluminum pair is known for its "love" for mutual sticking). It would be nice to warm up the bolt properly, but not every detail can be done this way…
However, a locksmith has a tool in his arsenal that can cope with the above problems: a rotary impact screwdriver. Its very name explains the principle of action: the transformation of the shock-translational movement into rotational. Already the appearance of this tool inspires respect. The impact screwdriver has a reinforced chromevanadium alloy metal case is several times larger than that of its "sister", and is designed for hammer blows. Actually, the dimensions of the case with notch rings are made in such a way that a screwdriver can be held with a non-working hand during operation.
The main "actor" is a bit, or a nozzle, with which an impact screwdriver transfers rotational energy. Nozzles, as a rule, come with it in a kit or are purchased separately. They are of two types: with a flat sting and cruciform. The nozzles are inserted into the connecting part of the square shape. Socket wrenches can also be attached to it. This allows the tool to work with bolts and nuts, which is especially useful for car mechanics.
For an impact screwdriver to be truly versatile, it must have a reverse function. This is implemented by a direction switch that allows the head of the screwdriver to rotate both clockwise and counterclockwise. The reverse function, firstly, allows you to use the tool also for firmly tightening a self-tapping bolt or other fasteners, and secondly, by acting on the connection in the "tightening-unscrewing" mode, you can release the most hopeless bolt. В There is absolutely nothing complicated about how to use an impact screwdriver. It is enough to set the desired direction of rotation on it, take it in your non-working hand, insert the tip of the nozzle into the slot of the screw / screw (or put the key on the bolt head) and hit the end of the screwdriver with a hammer.
So that her body does not slip in the palm of her hand, she must be wearing a glove. The impact combined with the rotation breaks up the rust on the propeller. As soon as it is released and rotated a few degrees, you should use the reverse function and make a few hits. This should further free the fastener threads from rust. The subsequent reverse in most cases completely unscrews the stuck bolt or screw. The impact screwdriver has long and firmly registered in the tools of large and small workshops, at vehicle service stations, in locksmith shops and in the boxes of home craftsmen. The most perfect and high-quality samples, made almost always in Germany, have no other reviews than excellent ones.
