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soldering brass

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Roger Hulett27/05/2019 16:41:45
131 forum posts
9 photos

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 P27/05/2019 17:05:34
2254 forum posts
91 photos

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

Ian P

Jeff Dayman27/05/2019 17:16:43
1660 forum posts
42 photos

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 Hulett30/05/2019 15:46:12
131 forum posts
9 photos

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 ?

3404630/05/2019 16:07:06
796 forum posts
6 photos

I stage solder my boilers and other items

Silver solder for stage one and a lower temp s/s for stage two followed by high temp solder such as Comsol followed by standard leaded plumbers solder if need be.


Edited By 34046 on 30/05/2019 16:07:37

BCPROF30/05/2019 16:25:57
114 forum posts

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 130/05/2019 18:01:53
68 forum posts

Tippex works for soft solder.

John B

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