soldering brass

[Roger HulettParticipant @rogerhulett83124]

[Roger HulettParticipant @rogerhulett83124]

I am beginning to assemble my brass,home made carburettor. I have faithfully copied the original. It is necessary to solder the parts together. However, some parts have to be soldered to other parts that have already been soldered. Is there a technique for keeping the old parts cool whilst heating up adjacent parts for soldering. The parts can not be soldered simultaneously.

[Ian PParticipant @ianp]

Usual method is to use two or more solders with different melting temperatures, (use the higher temp one first)

Ian P

[Jeff DaymanParticipant @jeffdayman43397]

You can use the old trick of wrapping the end you want to keep cool in a wet rag, or embed it in a cold raw potato.

Sometimes just clamping on a hemostat or attaching a piece of copper sheet with an alligator clip will do.

Good luck!

Edited By Jeff Dayman on 27/05/2019 17:17:38

[Roger HulettParticipant @rogerhulett83124]

Further to this topic, adjacent to the item being soldered there is a threaded section. Obviously I don't want to let the solder run into this area. Is there an anti flux,something that prevents the solder running into the threads….. Vaseline,grinding paste,butter, 3 in i oil ?

[Former MemberParticipant @formermember19781]

[This posting has been removed]

[BC ProfParticipant @bcprof]

If its silver solder I use either "lead" from a pencil of Tippex correction fluid . Never tried it for soft solder

Brian C

[John Billard 1Participant @johnbillard1]

Tippex works for soft solder.

John B

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