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Clevis soldering

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Clevis soldering

Old 03-18-2020, 06:58 AM
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plaurence
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Default Clevis soldering

Hi all,
finishing up a scratch build. Last one was about 25 years ago😁
I'm having an issue soldering a clevis to a 4-40 pushrod.

I’ve done this many times in the 90s with no issues.
however, the solder is not wicking into the clevis. It just rolls off the rod!
im using silver solder with flux. I also tried other types of solder with no success.
could it be the type of metal that these rods are made of?

any insight would be appreciated.

Old 03-18-2020, 09:22 AM
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jester_s1
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It could be a coating on the rod. Or if the rod is stainless, regular solder won't stick to it. Try scuffing it with 120 grit and tinning the rod by itself. If it won't tin, you have a metal incompatibility or bad flux.
Old 03-18-2020, 09:58 AM
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plaurence
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Originally Posted by jester_s1 View Post
It could be a coating on the rod. Or if the rod is stainless, regular solder won't stick to it. Try scuffing it with 120 grit and tinning the rod by itself. If it won't tin, you have a metal incompatibility or bad flux.
thanks
Old 03-18-2020, 03:41 PM
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The roll up into a ball sounds like the temp was to high.

Last edited by pkoury; 03-18-2020 at 03:44 PM.
Old 03-18-2020, 05:12 PM
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plaurence
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Originally Posted by pkoury View Post
The roll up into a ball sounds like the temp was to high.
good point.
Thanks
Old 03-18-2020, 06:15 PM
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jester_s1
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It will do that if you burned off your flux with too much heat, if the wire is dirty, or if the metal is incompatible.
Old 03-19-2020, 10:43 AM
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scale only 4 me
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I'll add,, I always take a drill bit to clean by scratch up the inside of the clevis hole before adding the flux,, I find that helps a lot
Old 03-19-2020, 10:47 AM
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plaurence
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Originally Posted by scale only 4 me View Post
I'll add,, I always take a drill bit to clean by scratch up the inside of the clevis hole before adding the flux,, I find that helps a lot
good idea

thanks

Old 03-27-2020, 02:42 PM
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Hi!
Use Stay-brite!
Old 03-27-2020, 02:46 PM
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plaurence
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Thanks Jan and all who responded.
I did use Stay Brite and it worked 🙂
Old 03-27-2020, 07:50 PM
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I think Stay Brite must come with a more aggressive flux than other solders. I've read several threads over the past few years saying that it worked when nothing else would. I've never had trouble getting old fashioned plumbing solder to stick with cheap rosin flux, but there has to be something different about Stay Brite.

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