Longiness backcase with stirpped screw issue

[Limited]

Hi,

I tried to open the back case of my watch. Unfortunately, I stripped three screws and I would really appreciate any suggestion or advice how to unscrewed them without damaging the whole or the back case.

I check that screw extractor is minimally available at 2 - 3mm while the screw itself is just around 1mm.

According to my googling, some of them suggested to solder another screw on the top of it with tin wire then to unscrew it. Has anyone ever tried successfully? 

Thank you so much in advance.

[AndyGSi]

I presume you mean stripped the head and not the thread?

Have you tried with either a flat blade or a torx bit?

Edit

You may also have success with the smallest DR from a set like this.

https://www.amazon.co.uk/Mesee-Extractor-Damaged-Stripped-Extension/dp/B0D7MHH5KH/ref=sr_1_15?crid=13R0BWWI19IZG&dib=eyJ2IjoiMSJ9.DvAKsAL-pid5egNQxHpMSDme3IPVmI5x8Wf19RtREscDFxRMZSeQ-NkNhXgTnryIUVD4PxgJbe6BWSXSB8BMb42rixEADGRxpl_P52pCaobvyb4CeytnpdtkalxmUe0as5h86TznmCHRvCepxVoERViDJdciYG4ECxAn8ooYVvewg9IxftunMVnO-VTMch3-WdIf7eS0hS6Igtl0Sch4Iw.L095Ig0bZXz7rNMdVagbcvp8kl7m4X21D3CDWmA2GWk&dib_tag=se&keywords=1mm+screw+removed&qid=1724589768&sprefix=1mm+screw+removed%2Caps%2C131&sr=8-15

Edited August 25, 2024 by AndyGSi

[rjenkinsgb]

You could try supergluing a small torx or pentalobe bit into the screw head, letting it cure fully, then trying to unscrew it? 

If the screw comes out you can break the bit free and try the same with the others.

The last resort is very carefully drill through the head using eg. a 1.2mm or 1.0mm bit in a pin vice. Once the head starts to move, twisting it out. You should be able to remove the rest of the screw after removing the back.

 

[Limited]

On 8/25/2024 at 6:55 PM, AndyGSi said:

I presume you mean stripped the head and not the thread?

Have you tried with either a flat blade or a torx bit?

Edit

You may also have success with the smallest DR from a set like this.

https://www.amazon.co.uk/Mesee-Extractor-Damaged-Stripped-Extension/dp/B0D7MHH5KH/ref=sr_1_15?crid=13R0BWWI19IZG&dib=eyJ2IjoiMSJ9.DvAKsAL-pid5egNQxHpMSDme3IPVmI5x8Wf19RtREscDFxRMZSeQ-NkNhXgTnryIUVD4PxgJbe6BWSXSB8BMb42rixEADGRxpl_P52pCaobvyb4CeytnpdtkalxmUe0as5h86TznmCHRvCepxVoERViDJdciYG4ECxAn8ooYVvewg9IxftunMVnO-VTMch3-WdIf7eS0hS6Igtl0Sch4Iw.L095Ig0bZXz7rNMdVagbcvp8kl7m4X21D3CDWmA2GWk&dib_tag=se&keywords=1mm+screw+removed&qid=1724589768&sprefix=1mm+screw+removed%2Caps%2C131&sr=8-15

On 8/25/2024 at 7:34 PM, rjenkinsgb said:

You could try supergluing a small torx or pentalobe bit into the screw head, letting it cure fully, then trying to unscrew it? 

If the screw comes out you can break the bit free and try the same with the others.

The last resort is very carefully drill through the head using eg. a 1.2mm or 1.0mm bit in a pin vice. Once the head starts to move, twisting it out. You should be able to remove the rest of the screw after removing the back.

 

Many thanks for the advice.

[CYCLOPS]

maybe the threads of the screws have some sort of adhesive like loktite, you can take the tip of a soldering iron and place it on the boogered up head for a few seconds and like said use an appropriate sized flat head screwdriver to turn...or use a Dremel tool with small diamond bit to cut a slot, you will have to be real steady for this though...

[Limited]

On 9/16/2024 at 1:23 AM, CYCLOPS said:

maybe the threads of the screws have some sort of adhesive like loktite, you can take the tip of a soldering iron and place it on the boogered up head for a few seconds and like said use an appropriate sized flat head screwdriver to turn...or use a Dremel tool with small diamond bit to cut a slot, you will have to be real steady for this though...

Hi, really appreciate your feedback.
Will try it and wish me luck.
Thank you!