extracting a 2.5mm sheared brass pin

[pizza]

extracting a sheared 2.5mm brass pin

i'm fixing an ivory carving/statue that has been dropped.

there is a ~2.5mm diameter threaded brass pin in the ivory that has sheared flush with the surface. i do not believe it's glued in, and the threads are just there provide additional friction. it was press fit.

ideas on the best way to remove it? i do not have a drill press, so bonus points for solutions that don't involve one. thanks, guys.

picture: https://i.imgur.com/jWCsVx5.jpg

 

[rbgearz]

Should be able to center punch it and drill it out easy enough. Maybe a left hand drill would catch and it might unscrew.

 

[ddawg16]

2.5 mm? That is pretty small.

I'd do like rbgearz said and center punch and drill...but I'd use a 2mm drill. Any threads will get sucked up during drilling....if not, it will be easy to pick them out,.

 

[gte718p]

Re: extracting a sheared 2.5mm brass pin

ideas on the best way to remove it? i do not have a drill press, so bonus points for solutions that don't involve one. thanks, guys.

picture: https://i.imgur.com/jWCsVx5.jpg

My opinion is the best way is drill press. Brass is soft so it will be easy to remove. The art is not damaging anything else while doing it. That is why I would go with well supported in a drill press.

Without a drill press. I think a dental bur on a dremel would make short work of it.

 

[snyder]

Can you leave the broken piece alone and use a new pin a little bit away from it.

 

[pizza]

thanks, guys.

i punched and drilled it, but as you can see, my aim was slightly off.
i guess it pays to be very precise. next time i'll try harder.

there's an remnant that's proving difficult to remove. i've tried safety pin, paperclip, etc. the perfectionist in me wants to remove the rest, but it doesn't really matter for the repair, so i'm just going to give up. it's close enough!

i could probably get it if i had some kind of spring steel pick. a dental pick maybe.

https://i.imgur.com/BW5XZ66.jpg
https://i.imgur.com/suYZB5I.jpg

Can you leave the broken piece alone and use a new pin a little bit away from it.

that would have been another perfectly acceptable option

 

[rbgearz]

Use gradually bigger drill bits to open up the hole, glue a dowel into the hole and redrill to the correct size.

 

[Marctrees]

Your centering hole on the stud was very well done.

Assuming the original stud is R thread... Did you use a L drill bit?

Marc

 

[pizza]

it's R thread stud, and i used R drill bit because i don't have L bits. but now i want a set.

 

[toplessHO]

tap the stud to the size youve already drilled it out to.
put a nut larger than the stud over the hole,place a small washer over the nut and thread a screw into tapped hole. As you thread screw in it will pull the stud out.