When screwing in the bolts, it sometimes happens that the hat breaks off. If such a nuisance occurred, of course, the question arises of how to unscrew a broken bolt without damaging the parts connected to it.
The simplest case is when the 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,
penetrating lubricant is sometimes used
. It is applied to the protruding part. Then they take a hammer and several times lightly hit it on the wreckage. This will facilitate the penetration of the lubricant inward to the thread. Then wait 5-10 minutes and begin to remove the rod.
It is more difficult to cope with such a task as unscrewing a broken bolt, broken flush with the surface or even below it. The key here will not help, since there is simply nothing to grab onto them. 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 quite feasible.
You can try to unscrew the broken bolt by making a groove under the screwdriver on the end of the rod. Under the usual, make a deeper cut. A Phillips screwdriver has a larger grip area, so it’s not necessary to deepen the groove particularly strongly. This method is quite effective and in most cases helps to solve the problem.
However, sometimes the rod wedges tightly, and a screwdriver does not help. For the home foreman, the question of how to unscrew the broken bolt remains relevant. The most radical way is to drill a hole for a bolt of a smaller diameter in the rod and cut the thread in it. To do this, you need an electric drill with a set of drills of different diameters and a tap.
Having screwed a small bolt into the chip and using a
wrench, you can quite easily cope with the problem. This method works in most cases. The only thing that is desirable to remember is that the thread inside the shaft must be reverse. Drill a hole very carefully, exactly in the center. Otherwise, when twisting, the thread can be easily broken.
In the same way, a broken nail, screw or stud is removed. A bolt or other fastener easily surface. In the worst 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 way to unscrew a broken bolt with a recessed shaft. You just need to weld the chip using a nut. Its diameter should be greater than the diameter of the rod by at least 1 mm. It is necessary that during welding the metal warms up and expands well. The resulting node is watered with cold water. After everything has cooled, the chip is carefully twisted.
We hope you received an answer to the question of how to unscrew a broken bolt. We wish that in the future all bolts, screws and studs could easily be screwed in and out without breaking.