Screw canceled - what to do?

Craftsmen and do-it-yourselfers alike have a lot to do with screws. As practical as screws are, there are always problems when screwing in or loosening a screw. Particularly annoying is a broken screw. What options you have yet to remove a torn screw, you can read here.

Problems with screws again and again

Screws are part of everyday life of craftsmen and DIYers. In most cases, there are no problems when a screw is screwed or loosened. But especially with screws screwed in for some time, it can happen again and again that the screw can no longer be loosened. There are several reasons why screws can not be turned out:

  • Head of the screw around
  • Screw turns through empty
  • the screw breaks off when turning out

Be sure to turn the screw in the right direction. If the screw head is round, you will find the right guide here. If the screw rotates through empty, we have solutions ready for you here.

Removal options when the shaft protrudes

With a broken screw, it depends on the individual circumstances how you can still remove the screw. If the screw shaft protrudes from the thread into which the screw has been screwed, you may be able to grasp it with a pair of pliers. It is best if the shaft protrudes so far that you can unscrew two nuts (nut with lock nut). Then you can loosen the lock nut like a conventional screw head.

Release broken screw with extractor

However, it will probably give this luck in the least cases. If the screw has a diameter that can still be worked, you can use a screw extractor. The Schraubenausdreher is a tapered pin with a left-hand thread, so opposite to the direction of screw conventional screws.

First, a grain is beaten in the broken screw shaft with a grain in the middle. Here the screw extractor is used together with some creeping and cutting oil. Since it is a left-hand thread, the extractor rotates further and further into the screw. The prerequisite is therefore that the bore was long enough. After several turns, the extractor then pulls tight.

The broken screw will loosen and be unscrewed. It makes sense to treat the screw with rust remover at least several hours before turning it out. Alternatively, if circumstances permit, heating the screw also makes sense. Detailed instructions on how to remove a broken screw with the screw extractor are provided here.

Often only the drilling out of the broken screw helps

If the screw is too small or can not be unscrewed for other reasons, there is only one solution left. Although boring or boring a screw is time-consuming, it is often the last option to remove a broken screw in such a way that the thread in which it is broken can still be used.

Tips & Tricks

Especially with many metal screws, there is a great risk that they break during the removal. It is therefore highly recommended for most metal screws to spray the screw generously with rust remover. The rust remover should be of very good quality and should be used as early as possible the day before. It is also advisable to re-spray the screw every few hours. For other screws it is possible to loosen them by heating.

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