Impossible screw. Help!!

[Hammare&Spik]

Have been at it for almost 1 hour with these three. It's completely impossible with manpower/puller to get out the top two screws. Anyone have any ideas on what I can do to get the damn things out?

 

[fribygg]

Have you knocked or heated?

 

[Hammare&Spik]

Knocked yes. But warmed no not tried.
will get back in 3min thanks

 

[Hammare&Spik]

I can sort of tighten them a little. So it's not like they're completely stuck. Feels like it's the thread that you turn counterclockwise that's broken.

 

[K_arlstrom]

Impact driver with bit holder, has three possible end results according to my experience... Available at, among others, Biltema
1. The screw loosens
2. The screw breaks
3. The slot gets damaged

It has quite a clever mechanism, I found a little explanation here

 

[Thomas_Blekinge]

Impact drivers can be one way.
It's important to get a good grip in the slot, and for that, it's necessary to use a screwdriver that has both the right width and the right thickness. Otherwise, it will just become a mess and a ruined slot. The art of screwing correctly with slotted screws has declined somewhat with all the modern Phillips and Torx.
Do you want to save the hinge? Otherwise, you can file a deeper slot.

 

[Hammare&Spik]

Doesn't work with heat either. The screwdriver slips when I try to turn. The thread is damaged. I've also tried to fill with silver tape. That didn't work either.

 

[MrDizzy]

Would probably have tried to drill them out or alternatively weld a bolt and pull/screw them out.

 

[Hammare&Spik]

An impact driver might be one way.
It's important to get a good grip in the slot, and for that, you need to use a screwdriver that has both the right width and thickness. Otherwise, it will just be a disaster and a ruined slot. The art of properly screwing with slot screws has deteriorated a bit with all modern star and torx.
Do you want to save the hinge? Otherwise, you can grind a deeper slot.

It's a window that I'm trying to restore. I'm not concerned about the hinge. But I'm worried that the window will break if I grind deeper slots?

 

[Etho1]

Screw extraction
Drill
Test tomorrow

 

[BJER]

Would probably have tried to drill them out or weld a bolt and pull/screw it off.

Agree the easiest is to drill off the screw head everything fixed

 

[Hammare&Spik]

Haha. Thanks kings! They worked to grind up a track
Got cramp in biceps

 

[Harald Blåtumme]

Impact screwdriver with bit holder, has three possible outcomes according to my experience... Available at, among others, Biltema
1. The screw comes loose
2. The screw breaks
3. The slot gets damaged

It has a rather clever mechanism, I found a small explanation here [media]

Yep, I have one of those. It's a bit funny that there are hardly any power tools that do what this gadget does. Everyone should have one in their arsenal!
__
PS. It's a good idea to grease the mechanism with, for example, lithium grease for optimal performance, or "moly" grease, i.e., MoS2-based.

 

[Niq]

What has worked best for me when it comes to similar screws to windows is to first apply a bit of heat so the paint becomes soft and you can easily scrape it off. It's important that the screw slot is completely clean. Scrape a bit extra and then use a good screwdriver that fits well in the slot and fills the entire slot. This usually works, but sometimes it's so tight that the screw still gives way.

 

[Stefan1972]

If screws are stuck, you shouldn't use a screwdriver anyway. It's best to use a well-fitting screwdriver and then apply force. Often the screw gets damaged by incorrect tools, making it harder and harder for yourself in addition. Then clean thoroughly from the start, not after you've mangled the slot.......