How to unscrew the broken bolt correctly?

When screwing the bolts it sometimes happens that the hat breaks off. If there was such a trouble, of course, the question arises as to how to unscrew the broken bolt without damaging the parts connected by 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 the adjustable wrench and adjust it appropriately, carefully unscrew the rod. To facilitate the process, a penetrating lubricant is sometimes used . It is applied to the protruding part. Then take a hammer and several times slightly hit them on the wreckage. This will help penetrate the grease inside to the thread. Then wait 5-10 minutes and proceed to remove the rod.

It is more difficult to cope with such task as to unscrew the broken bolt, broken level with the surface or even below it. The key here does not help, since there's simply no way to grab them. However, nothing is impossible, you just have 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 on the end of the rod for a screwdriver. Under the usual make a slit deeper. With a Phillips screwdriver, the grip area with the surface is larger, so it is not necessary to deepen the groove particularly. This method is quite effective and in most cases helps to solve the problem.

However, sometimes the rod jams tightly, and the screwdriver does not help. For the home master, the question remains on how to unscrew the broken bolt. The most radical way is to drill a bolt hole of a smaller diameter into the rod and cut the thread in it. This requires an electric drill with a set of drill bits of different diameters and a tap.

Screwing a small bolt into the chip and applying a wrench, you can easily cope with the problem. This method works in most cases. The only thing that it is desirable to remember is that the thread inside the rod should be reversed. Drill the hole very carefully, exactly in the center. Otherwise, when unscrewing, the threads can be easily broken.

Similarly, a broken nail, screw or hairpin is removed. The bolt or other fastening element 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 way to unscrew a broken bolt with a recessed rod. 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 unit is poured cold water. After all has cooled down, the chip is carefully twisted.

We hope the answer to the question on how to unscrew the broken bolt, you got. We wish that in the future all the bolts, screws and pins are easily screwed and twisted, not breaking.