Geoff Hodbod wrote:

Hi,

I have a hinge on the temple rod of a pair of spectacles that is
broken. I think that it is spot welded on. Is there some kind of
fairly inexpensive tool that would help me remove this?

I would like to remove this and add a fresh hinge. I think that the
frames are some kind of nickel alloy. I was thinking of using this

"Silberfix" hard solder 62% Ag without Cd that has a melting point of
650 C and is suitable for bronze,nickel, stainless steel.

Do you think this would be tough enough? Is there some inexpensive
device that will allow you to solder at 650C?

I found this:
http://www.cybermarket.co.uk/ishop/923/shopscr1664.html
would this do?

And advice welcome. Thank you

I'm in the UK


Since it is on the temple part, it's a lot easier than if it were on the
frame itself. I fixed one on my son's glasses a couple of weeks ago. I
filed up a new hinge half from a bit of brass and drilled a hole about
1.4" deep in the back end to suit the temple rod (which happened to be
round.)

I soldered it in with non-lead solder like this stuff from Radio Shack,
and a bit of acid flux (tinner's fluid). Plenty strong for that sort of
application.

http://www.radioshack.com/product.as...%5Fid=64%2D025

You can probably remove the busted hinge from the temple piece with some
patient judicious filing.

For something that tiny you could get all the heat you need by borrowing
a pipe smoking friend's butane pipe lighter, or even using an alcohol
lamp and a purchased or homemade blowpipe.

If there's a plastic earpad on the temple piece, fasten a small G-clamp
(that is what you Brits call them, isn't it?) in the middle of the
temple piece to sink the heat so you don't melt the plastic. It wouldn't
hurt to wrap a bit of wet cloth one the "cold side" of that clamp "just
in case".

BBL,

Jeff


--
Jeff Wisnia (W1BSV + Brass Rat '57 EE)

"As long as there are final exams, there will be prayer in public
schools"