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Each owner at least once faced with such unpleasant situation, like a broken bolt or stud, who are stuck in a deep hole. When that happens, the situation seems to be really bad. In fact, the problem can be solved quite easily with your hands as soon as possible.
First, let's understand why a bolt or pin break. This happens due to the key applying excessive force, the oxidation of the bolt thread, the fastener defective or excessive tightening. The situation may be complicated by the fact that metiz screwed into matter that is softer, from which it is made itself.
Training
First you need to make an exploratory action.
To remove the malicious fragment of the material, Novate.ru recommends to take and knock on the fragment specifically a spring-loaded center punch. However, you can loosen the fastener and landing accurate punches conventional hammer. Thereafter, the item should be heated using a gas burner. This will help relieve some of the tension. However, if metiz screwed to aluminum, it is necessary to be careful not to overdo it. To improve the mobility of the fragment is pour into the hole W-40 (or any other similar structure). All of these events (in the complex) will significantly simplify further work.
extraction
The greatest difficulty extracting the fastener from the hole wizard waits when working with non-planar surface. In this case, among other issues, will remain a risk to slip and damage the threads. The first step is to find a suitable threaded sleeve. It is screwed into the bore until it stops in the bolt or stud, after which a lock nut is tightened. Now in the fragment is necessary to make a hole using a drill under the extractor. The tip of the solid drill is lubricated with grease.
We check the depth of the hole and the fact that it is made strictly according to the center. The hole should not be able to cross-cutting, if there is no desire to damage the part from which is extracted the pin or bolt piece. Now it remains only to take and drive a suitable extractor. Hold the finger-wrenching detail splinter.
Video
Continuing the theme 5 unconventional methods of using the screwdriver used by skilled craftsmen and not only.
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A source: https://novate.ru/blogs/201118/48481/