Each time, coming to any mechanism, alreadylong in need of inspection and maintenance, the owner is uncomfortably scratching the back of his head. Outside, the mechanism, as a rule, is already fairly spoiled with rust, and for sure all the connections are tightly picked up. And so every time before unscrewing the bolted bolt. The whole hunt for work can be repelled!
And what happened is this. When the bolt was twisted, the necessary tightness was not achieved, moisture was introduced into the threaded connection, and the reaction of water with iron in the presence of oxygen gave hydrated ferric hydroxide, that is, rust. She scored a thread, the connection jammed. Well, how to unscrew the bolted bolt, if the connection is not spun for years?
To begin with, you can try to dissolve the rust. This is well done by glycol - a substance contained in antifreeze or brake fluid. A damp rag is placed on the stuck carving, the glycol penetrates into the rust, loosens it, and unscrewing the rusty screw will immediately become easier.
The thread micro-gap also penetrates wellKerosene, and even a solvent, white spirit. Therefore, craftsmen from car repair shops in difficult situations like to use WD-40 aerosol, half-composed of white spirit. In order for the liquid to penetrate the thread better, you can tap it lightly over the head of the bolt. Wait for no more than 10 minutes.
And there is still, so to speak, a scientific way,how to unscrew the bolted bolt. Around the head of the bolt it is necessary to build a rim of plasticine or wax, put a little zinc inside and pour sulfuric acid. Fasteners, it will not have time to corrode, because it immediately pounces on the rust and, reacting with zinc, starts on the surface to restore the iron. The chemical reaction will literally clean out the rust from the thread.
If it does not work out, you can resort toheating the bolt, then a gas burner (or soldering iron) is required. The bolt heated to about 230 degrees should cool down. In the process of heating / cooling, the changed geometry of the metal will destroy the rust so that the threads are released to penetrate the liquid lubricants. And then there are no problems with how to unscrew the bolt, should not be.
When unscrewing in the hand should be a quality,reliable and proven tool. Of course, not made in China. The carve keys in such a case are ineffective - get crushed heads of bolts and downed hands from breakdowns. Use nakidnymi keys and heads. Unscrew the movements back and forth, vraskachku, as if you cut the thread or pull the jammed car out of the mud. At the same time penetration into the thread of the lubricant will increase.
There are also more radical and extremeways how to unscrew the bolted bolt. First, tap the head of the bolt from above with a hammer - this will break the structure of the rust. Then, using a chisel or a strong screwdriver and a hammer, tap each face of the head alternately, directing the shocks along the axis of rotation. In the vast majority of cases, the stubborn bolt must succumb and twist.
And the last. When you re-tighten the bolt, please do not forget about graphite grease, solid oil or engine oil. Then, for many years, the carving, neither corrosion, nor oxides will not be terrible.</ p>>
