screw extraction

[gary17]

Hey guys

Any ideas how i can remove this screw. Looks like someone else has had a go. Tried soaking in oil. Drill bit slides of or one snapped. You cannot get a grip on it from either end.

any suggestions welcome.

cheers

gary

[Plato]

This tool might be useful:

https://www.cousinsuk.com/product/screw-extractor?code=S1518

[jdrichard]

2 hours ago, gary17 said:

Hey guys

Any ideas how i can remove this screw. Looks like someone else has had a go. Tried soaking in oil. Drill bit slides of or one snapped. You cannot get a grip on it from either end.

any suggestions welcome.

cheers

gary

I would use my lathe and plate holder and drill it out with a bit slightly smaller than the walls of the hole. It will likely then disintegrate

[clockboy]

The tool I would use is what Plato has highlighted. To be honest since owning this tool I have only used it once but it worked  great. 

[jdrichard]

47 minutes ago, clockboy said:

The tool I would use is what Plato has highlighted. To be honest since owning this tool I have only used it once but it worked  great. 

Picture 

[JohnR725]

if you can remove everything else steel on the plate so that the screw you want to extract is the only thing steel you could use alum to dissolve it out

[clockboy]

12 hours ago, jdrichard said:

Picture 

[jdrichard]

On 7/18/2021 at 4:35 AM, clockboy said:

Have one of these. Work some time when all things are good. But when the screw is really jammed in, tool is no good and you need to cut it out with a lathe.

[clockboy]

45 minutes ago, jdrichard said:

Have one of these. Work some time when all things are good. But when the screw is really jammed in, tool is no good and you need to cut it out with a lathe.

Agree but many do not own a lathe so accurate micro drilling is another option. Another option is maybe the Alum trick but I have never been successful with it

[Nucejoe]

 Alum doesn't disolve base metals.  Y

You ought make sure nothing else that alum disolves is soaked in,  remove the click and I am not sure about those pin locators.

I drop tens of crowns in alum at a time, works fine.

[nickelsilver]

If doing the alum technique clean the part really well before, the oil and stuff you've tried will impede the alum working. There is a product from Bergeon called Vissin which is sulfuric acid at some secret concentration that you heat up and it dissolves broken screws quite quickly.

[JohnR725]

3 hours ago, clockboy said:

Another option is maybe the Alum trick but I have never been successful with it

I'd be curious about how you're doing it as to why you're not getting success?

important thing to remember when using alum is everything has to be clean you can't have any residual oils covering the component. Definitely make sure there's no other steel components because they'll dissolve. Mix the solution as strong as you can get it and if you can figure out a way of heating it up that will speed up things considerably. Otherwise without the heat will take a while possibly a long while. but I've always had at work and it's nice in the nothing gets damaged like trying to drill it out or other methods.