Soft soldering.

I have 4 brass hollow balls that need parts soft soldered onto them
they are highly visible as they are part of a Harrison H1 type clock
is there some compound or barrier that will stop the solder flowing al over the place, i once read about Tipex but not sure if this is good fo soft solder, regards Dav
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David, B****** Computer is going mad but simply use a soft pencil to shade around your solder joint.
Norman
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Paste solder! It's a mix of solder, and flux, sold by jewelers supply firms. Use a light smear on one part, assemble, wipe off any exess, and heat. It makes a nice neat joint
Steve R.
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Return address munged, to bugger up spammers!



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David, Steve's solder paste is the way to go but it does not prevent the solder running which is your question. I have actually done this type of work leading car panels. I have also used it in silver soldering and brazing. Obviously, there is a proprietory 'shield' which does a similar task. However, this ''lead pencil' stuff is straight out of Newcastle. Following the logic, and my wife has a Dip.Orth., One uses powdered graphite as a parting agent in casting. 'Lead' pencils are graphite. OK, me old son? I could have said 'Tippex' but where the hell do you get a typewriter to get Tippex these days?
Norm
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them,
clock,
flowing all

good for

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wrote:

    Tippex is perfect for soft solder. --
Chris Edwards (in deepest Dorset) "....there *must* be an easier way!"
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Many thanks one and all, i will do tests with pencil and Tippex, regard
Dav
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Chronos sells
Carr's Solder Black
Err, uhm- David?
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You could try one of the solder pastes (used for SMD's) applie
sparingly inside the joint faces only, then a dry(not loaded wit solder) hot iron right on the top of the part being afixed, but b aware solder will try to flow towards the scource of the heat
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wrote:

Is the wall thickness of the ball too small to allow a mechanical connection (tapped hole/screw)?
Another alternative is adhesives rather than soft solder - Epoxy for example. Rather easier to control where that goes, and to clean off any excess.
If its good enough to attach the wings to a modern aircraft it should work well enough to hold your balls in place ;-)
Regards, Tony
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As I seem to live closest to Dave, does this mean that I have to inspect his balls? I don't fancy the idea of applying e- poxy- resin and Dave seems to be in two minds about them being blacked.
Should we suspend things until more research is conducted? There seems to be more than one drawback!
Norm
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I hope my aircraft that I will be flying in soon won't have its wings attached with glue.... :-))
Peter -- Peter A Forbes Prepair Ltd, Rushden, UK snipped-for-privacy@easynet.co.uk http://www.prepair.co.uk
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wrote:

should
wings attached

I'd be much more concerned if they weren't attached rather than were attached !!!!
AWEM
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Hi Tony, the balls are spun brass, at a guess about 20 thou thick, i wa
thinking of silver soldering them but there is a big difference in th mass of the parts to be joined, the danger would be in melting th ball! Hi Norm, you can come round and look at my balls anytime, jus have to wait till my wife comes home so i can ask her where she pu them, Dav
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My late father-in-law (retired bank manager) had a favourite joke - bit feeble.
A bank manager met one of his clients, an aircraft designer, looking very harassed one day. On asking why, he was told that the wings kept falling off his latest a/c design. The manager said "try perforating the metal where the wing meets the fuselage. A few weeks later he met the client again. "How are you getting on?"
"Well, How on earth do you, a bank manager, know more about designing a/c than I do? I've been struggling for months, but your idea worked first time."
"Ah", said the manager, "I've noticed that none of the forms I use ever tear along the perforations like they should."
Ho hum.
David
--
David Littlewood

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Thanks for all the tips, the pencil worked fine, Dav
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Prepair Ltd wrote:

Don't worry, they are also screwed! :-))
Nick
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On Wed, 08 Aug 2007 12:40:57 +0100, Prepair Ltd

Peter -
Better quit flying in that case!
Seriously, modern aircraft are making increasing use of composites, held together with high tech adhesives. The latest Boeing 787 claims to be 50% composite materials (for "composite materials" read "plastic"). See:
http://www.boeing.com/commercial/787family/background.html
So soon you can fly in the modern equivalent of an Airfix kit <G> Regards, Tony
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DCreed wrote:

In jewellery making, we paint ochre onto surfaces adjacent to solder joints to stop the flow
--
Karen

If you can't be a good example, then you'll just have to be a horrible warning.'
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