crafts - hard solder 650 degree C what do I need to melt this?

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hard solder 650 degree C what do I need to melt this?

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

The problem with jewelry-size silver soldering jobs is that of overheating
and damaging surrounding areas; to the extent of "unsoldering" components in
those areas. Generally, the problem comes down to one of control rather
than temperature.
Check www.littletorch.com for an excellent small torch system.

Bob Swinney

"Geoff Hodbod" wrote in message
...
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

Geoff Hodbod writes:

Is there some inexpensive
device that will allow you to solder at 650C?

Something that tiny can be immersed in a small-torch propane or MAPP gas
flame, which should do it.

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"

"Geoff Hodbod" wrote in message
...
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

I would farm this out. with the right tools this job is a snap. with the
wrong tools you probably scrap your spectacles.

Do a Google search. Optical frame repair UK came up with over 67,000 hits.

Ask your local optician about the job. This might be a pleasant surprise at
how cheap this job can be done.

--

Roger Shoaf

About the time I had mastered getting the toothpaste back in the tube, then
they come up with this striped stuff.

In article ,
Geoff Hodbod wrote:
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?

A file or a small grinder.

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.

In my part of the world I believe the optical people use 'easiflo' silver
solder/brazing rod for spec parts. Melts at 610degC. Well tough enough.

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?

Probably. The deciding factor is how much of a heat-sink is the part to be
attached to. Being a temple I guess it'd be alright.

Where are you getting the fresh hinge from?

I'm in the UK

Don't forget to vote next year.

Bri

--
B r i a n A d a m
e y e g l a s s e s j e w e l l e r y
Auckland NEW ZEALAND
www.adam.co.nz

I got a similar hinge from and old pair of glasses my girlfriend's optician
father had laying around, ground off the old hinge and what was left on the
hinge and soft soldered it. Worked fine.
Karl
"Geoff Hodbod" wrote in message
...
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

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