When screwing in bolts, it sometimes happens that the cap breaks off. If such a trouble occurs, of course, the question arises of how to unscrew the broken bolt without damaging the parts connected by it.
The simplest case is when a protruding part of the thread remains above the surface. This scenario is quite favorable. All that is needed is to take an adjustable wrench and, having adjusted it accordingly, carefully unscrew the rod. To facilitate the process, a penetrating lubricant is sometimes used. It is applied to the protruding part. Then they take a hammer and lightly hit it several times on the fragment. This will allow the lubricant to penetrate into the threads. Then they wait 5-10 minutes and proceed to remove the rod.
The harder task is to unscrew a broken bolt that is broken flush with the surface or even below it. The key will not help here, since there is simply nothing to grab onto. However, nothing is impossible, you just need to be patient. This problem can be solved in several ways. All of them are quite complex and time consuming, but quitedoable.
You can try to unscrew the broken bolt by making a groove for a screwdriver at the end of the rod. A deeper cut is made under the usual one. A Phillips screwdriver has a larger area of adhesion to the surface, so it is not necessary to deepen the groove especially much. This method is quite effective and in most cases solves the problem.
However, sometimes the rod jams firmly, and the screwdriver does not help. For the home master, the question of how to unscrew a broken bolt is still relevant. The most radical way is to drill a hole in the rod for a smaller diameter bolt and cut a thread in it. This will require an electric drill with a set of drills of different diameters and a tap.
By screwing a small bolt into a chip and using a wrench, you can deal with the problem quite easily. This method works in most cases. The only thing to remember is that the thread inside the rod must be reversed. You need to drill a hole very carefully, exactly in the center. Otherwise, the threads can be easily stripped when unscrewing.
A broken nail, screw or hairpin is removed in the same way. A bolt or other fastener easily comes to the surface. In the most extreme case, the hole is gradually expanded, using drills of different diameters (from smaller to larger) until the steel walls of the rod become very thin. After that, they can be broken and pulled out with tweezers.
There is another fairly simple wayunscrew the broken bolt with a recessed shaft. You just need to weld the chip using a nut. Its diameter must be greater than the diameter of the rod by at least 1 mm. It is necessary that during welding the metal warms up well and expands. The resulting knot is poured with cold water. After everything has cooled down, the chip is carefully twisted.
We hope you have received an answer to the question of how to unscrew a broken bolt. We wish that in the future all bolts, screws and studs can be easily screwed in and out without breaking.
