Soldering brass pipe inside a pipe

[ScaleMotorcars]

I have a project that requires a pipe to be soldered inside another. Both are very thin gauge and both are the same length. Basically doubling the wall thickness.

Anyone have a trick on soldering this? Im using a flux and good solder but since the fit is so tight Im having trouble with good penetration.

[Ton]

I used this trick this week for myself: cut 2 pieces of brass plate (about 5mm width). Solder these on the inner tube and put the outer tube over it and solder this the the previous parts.

Ton

[xken]

Dan,

Try coating the inner tubes outer surface with flux and then insert into the larger tube. Then with a really hot iron and 50/50 solder or silver solder (Staybrite) holding the tubes horizontal on one end with needle noze pliers gather a puddle of solder on the hot iron and touch it to the end of the tubes. If the tempurature is hot enough the solder will flow up the tubes, even if they are a press fit. That is the beauty of solder the tighter the fit the stronger the joint.

If you are having trouble it is probably due to not enough heat.

Ken

[ScaleMotorcars]

Thanks Ken. Im using the jewelers torch as I still dont have a good electric iron.

Ive been trying to solder then straight up and down but not horizontal. I figured gravity would help me. Ill give your way a try later tonight.

Thanks...

[ScaleMotorcars]

Well Ken your ideal of soldering horizontal did the trick.

This is my current sanity project. Its my new desk fan with variable pitch blades to adjust air speed. So far nearly 200 parts just in the blade and pitch control.

Overkill, maybe...

[3.Star]

The coooolest fan I've ever seen. Is it working remote controlled? Please tell us more about it, Dan.


Cheers

Michael

[Nortley]

Was the design inspired by a steam powered helicopter? It's beautiful - and a lot more elegant than the ceiling fan I once made for the shipyard office.

[3.Star]

SMC seems to be a crazy fan site.

[ScaleMotorcars]

Nortly, you scare me a little.