Unscrewing Damaged 7-Key Wrench Screw: Effective Methods for Removal

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#1 5579539 28 Sep 2008 16:58

Anonymous Anonymous

Anonymous

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Post #1
5579539 28 Sep 2008 16:58

Hello!

I am addressing a stupid problem, namely unscrewing the damaged screw, it is a 7-ke wrench but there is a head that has turned off, I tried various combinations to unscrew it and nothing.

Thank you in advance for your help
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#2 5579578 28 Sep 2008 17:14

goldwinger goldwinger

VIP Meritorious for electroda.pl

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Post #2
5579578 28 Sep 2008 17:14

Head somewhere on top or hidden?
#3 5579615 28 Sep 2008 17:27

Moulder Moulder

Level 23

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Post #3
5579615 28 Sep 2008 17:27

Shoot a photo of accessing this screw as much as you can.
#4 5579636 28 Sep 2008 17:35

terminux terminux

Level 23

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Post #4
5579636 28 Sep 2008 17:35

What's that screw sitting in? Metal, plastic, wood? You can heat it up, you can water it (WD40 or Coca-Cola), you can catch it with a "frog", you can use special taps with a left-hand thread. It all depends where, in what and how much it sticks out.
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#5 5579638 28 Sep 2008 17:37

Anonymous Anonymous

Anonymous

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Post #5
5579638 28 Sep 2008 17:37

the screw is on top so the access is good and the photos are unlikely to be possible

Added after 2 [minutes]:

the screw sits in the metal (the lid from the kopka side of the scooter) I already poured wd40 in and it did not work because there is no way to catch this screw
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#6 5579649 28 Sep 2008 17:38

rafixs rafixs

Level 24

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Post #6
5579649 28 Sep 2008 17:38

Try to grab this bolt with the frogs and use the WD40 (it helps).
good luck
#7 5579658 28 Sep 2008 17:41

adam7009 adam7009

Company Account
Level 41

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Post #7
5579658 28 Sep 2008 17:41

it's best to weld something.
#8 5579675 28 Sep 2008 17:48

Anonymous Anonymous

Level 1

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Post #8
5579675 28 Sep 2008 17:48

I support, when nothing helps, you can weld something, as I guess, the bolt sits in aluminum when unscrewing such a bolt, be careful not to break it a little, then screw it in slowly, just in case, because when it breaks, it will be. I use ordinary water instead of wd40, but in my opinion, wd 40 will not help, because how do you treat the thread with this agent if you do not have access to it?
#9 5579678 28 Sep 2008 17:50

Anonymous Anonymous

Anonymous

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Post #9
5579678 28 Sep 2008 17:50

Cut the head with a saw blade and unscrew with a flat screwdriver.
#10 5579692 28 Sep 2008 17:54

Anonymous Anonymous

Anonymous

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Post #10
5579692 28 Sep 2008 17:54

access to the screw is very good and it is not possible to use a screwdriver because the screw is tightened very tightly
#11 5579697 28 Sep 2008 17:56

Anonymous Anonymous

Anonymous

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Post #11
5579697 28 Sep 2008 17:56

Well, tightly tightened. A 7mm wrench screw is no different than the M4.
If I was worried about such things, I would not earn a bread with salt.
Have you heard of something like an impact screwdriver?
#12 5579708 28 Sep 2008 17:59

Anonymous Anonymous

Level 1

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Post #12
5579708 28 Sep 2008 17:59

You mean a hammer and a screwdriver?
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#13 5579714 28 Sep 2008 18:01

adam7009 adam7009

Company Account
Level 41

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Post #13
5579714 28 Sep 2008 18:01

and if the head is machined, you can also punch the key no smaller.
#14 5579727 28 Sep 2008 18:05

Anonymous Anonymous

Anonymous

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Post #14
5579727 28 Sep 2008 18:05

Can be filed and loaded with a 6.5mm cap. But decent, not the Chinese bazaar sets. It always remains to drill through and use a broken screw extractor.
#15 5579766 28 Sep 2008 18:15

adam7009 adam7009

Company Account
Level 41

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Post #15
5579766 28 Sep 2008 18:15

elektrit wrote:
not from those Chinese bazaar sets.
with such wrenches you usually damage the heads of the screws, not to mention your hands as the wrench will jump.
#16 5579779 28 Sep 2008 18:18

Lutek49 Lutek49

Level 36

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Post #16
5579779 28 Sep 2008 18:18

Or, as a colleague of electrite wrote earlier, make an incision and an impact screwdriver, although with such a small head of the screw, it must be done carefully so as not to break it.
#17 5579792 28 Sep 2008 18:22

Anonymous Anonymous

Anonymous

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Post #17
5579792 28 Sep 2008 18:22

unfortunately I do not have an impact screwdriver
#18 5579806 28 Sep 2008 18:24

goldwinger goldwinger

VIP Meritorious for electroda.pl

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Post #18
5579806 28 Sep 2008 18:24

Chisel and hammer
#19 5579810 28 Sep 2008 18:26

Anonymous Anonymous

Anonymous

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Post #19
5579810 28 Sep 2008 18:26

It's a decent hexagonal wrench screwdriver.
#20 5579816 28 Sep 2008 18:28

goldwinger goldwinger

VIP Meritorious for electroda.pl

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Post #20
5579816 28 Sep 2008 18:28

Electrite, it's a pity to fight, the barbaric method will be the fastest and easiest in this case
#21 5579966 28 Sep 2008 19:07

Anonymous Anonymous

Anonymous

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Post #21
5579966 28 Sep 2008 19:07

the easiest way is just a hammer, give her a smile a few times and you will twist it with your fingers without grace
#22 5580149 28 Sep 2008 19:53

marek1977 marek1977

Level 33

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Post #22
5580149 28 Sep 2008 19:53

Drill and try with a extractor, and if it is impossible to drill a larger one.
#23 5580172 28 Sep 2008 19:59

ociz ociz

VIP Meritorious for electroda.pl

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Post #23
5580172 28 Sep 2008 19:59

when about unscrewing, someone has managed to unscrew the brake force regulator, for example in VW Golf 3?
#24 5580938 28 Sep 2008 23:15

Anonymous Anonymous

Anonymous

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Post #24
5580938 28 Sep 2008 23:15

hard to unscrew the pan head screws, you know how hard they go when you unscrew the electromagnet in Bosch starters.
#25 5580956 28 Sep 2008 23:20

Anonymous Anonymous

Anonymous

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Post #25
5580956 28 Sep 2008 23:20

you also need to cover it only with respect for the material - preferably using the inertia of the entire starter
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#26 5581049 28 Sep 2008 23:55

yakub0 yakub0

Level 12

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Helpful post
Post #26
5581049 28 Sep 2008 23:55

drill and drill bit drill the screw, the head will break, the screw will lose strength and will come out by itself
#27 5581260 29 Sep 2008 06:59

Anonymous Anonymous

Anonymous

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Post #27
5581260 29 Sep 2008 06:59

Hello!
I solved the problem, drilled the bolt and she left alone. Close the topic
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Topic summary

The discussion revolves around the challenge of removing a damaged 7-key wrench screw, specifically one with a stripped head. Various methods are suggested, including using penetrating oils like WD-40, heating the screw, and employing tools such as "frogs" (gripping tools) and impact screwdrivers. Some participants recommend welding a new piece onto the screw for better grip, while others suggest cutting the head off and using a flat screwdriver. Drilling the screw and using an extractor is also mentioned as a last resort. Ultimately, the original poster successfully resolved the issue by drilling the screw, which allowed it to come out easily.
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Unscrewing Damaged 7-Key Wrench Screw: Effective Methods for Removal