Seven ways to unscrew a broken bolt or stud
Personally, I have repeatedly encountered a problem when a bolt or stud under the root breaks. Moreover, I am not some kind of auto mechanic or mechanic. All this I say to the fact that this also happens with an ordinary person who periodically deals with technology or other technical part. Well, since you are in this situation, then do not despair - everything is fixable. I offer you seven ways to get out of this position and free the thread from a piece of a stud or bolt.Next, to remove internal stresses a little,With a gas burner, we thoroughly heat the chip and the space around it.Well, then we proceed directly to unscrewing a piece of a stud or bolt.
This is the easiest way, but it is not always suitable. In about half the case, the stud breaks off with a protruding splinter, for which you can just catch.Take a flat screwdriver, abut it in a shard and with a shock motion at an angle in the direction of unscrewing the thread gently rotate the chip.This method is suitable if you do not need a lot of effort for unscrewing. If the effort is not enough, then go to the second method.Press the core into the surface of the debris with a displacement and strike at an angle, perform the eversion, until the chip can be hooked with pliers or another tool.
Preparation before turning a piece of debrisBut do not rush to start unscrewing. Before that, it is necessary to take measures that will facilitate your efforts. First of all, let's spray the breaking point with penetrating lubricating fluid. This can be any “liquid key”, WD-40. Let's wait a bit.
First method: flat screwdriver and hammer
This is the easiest way, but it is not always suitable. In about half the case, the stud breaks off with a protruding splinter, for which you can just catch.
Second method: we try to unscrew it with a chiselThis method is similar to the first one, only we take a chisel instead of a screwdriver. Likewise, we rest on the fragment and use the percussion movements to turn it over. A chisel makes it possible to create more force than a screwdriver.
The third method: a core and a hammerIf if the bolt chip has no debris, or even a breaking occurred just below the end surface of the thread, then you can try using core.
Fourth method: weld the nut by weldingIn my opinion this is the most effective and fastest option, but if you have welding machine. Its essence is to weld a nut on top of a piece of a bolt. So, to do this, we take a nut, but not the same size, but a couple more units.That is, if the broken bolt was 10, then take the nut 12. It is necessary for a better and more welding places .
Fifth method: unscrew the pin with an extractorYou will also need a specialized tool specifically designed to unscrew broken studs and bolts - extractor .
The sixth method: drill a pieceThe method is to pick up a drill bit on the bottom diameter of the thread of the pin and drill it . Very hard way, requires skill. First we go through a drill of a smaller diameter.
The seventh way: we drill out clean and make an insertThe most time consuming and costly method of all. But there are cases when it is the only working option to return the node to its working state. Drill out the stud clean along with the thread.
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