Steve,
I tried the burnt finger trick and was able to remove .006 inches in 30
seconds in the solder pot. The resistor I dipped had a .047 diameter copper
lead before and .041 diameter after. I should think your component could
withstand an extra 15 second temp cycle (or less). Shake them as hard as
you can while immersed in the solder bath. If your worried about it just
find a way to heat sink the part or better yet drill some holes in a sheet
of unsolderable metal (oxidize some stainless) (titanium is best) then do
several at one time. Most of the heat will transfer to the sheet metal and
the component temperature will be significantly reduced. Don't forget the
copper is ending up in your solder bath.
Good Luck (I never did understand that square peg in the round hole thing)
Too much lead in my blood.
Russ (burnt fingers) Winslow
-----Original Message-----
From: Stephen R. Gregory <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Monday, August 24, 1998 7:06 PM
Subject: [TN] Assy: How can a square peg fit in a round hole?
>Hi ya'll!
>
>I'm pretty sure that one or two of you "ol' crusty" types (I mean that in a
>GOOD way), have run across this problem I have a time or two. I have this
>board I'm building in a quasi "prototype/pre-production" run that has a PTH
>rectifier diode installed vertically...some of you have may have guessed
what
>my problem is already from my subject, the hole's too small.
>Lead diameter is right around .050" +/- a mil or two, guess what the hole
size
>is? .050", +/- a mil or two...that's just peachy ain't it? It goes two
times
>per board, and we gotta' build a hundred of these, maybe two hundred.
>
>So tell me, what have all you "old salts" done to make a square peg to fit
in
>a round hole? I've had some REALLY GOOD suggestions from some "experts"
here,
>one was to get a dremel and drill the hole out (sounds good to
me!...snicker),
>another was to get a can of "Freeze-it" and spray the diode leads with it,
>then hurry up and stuff it in the hole before it warms up and
expands...that
>sounded pretty keen too, except it's hard to hold the diodes when you're
>wearing mittens to keep from getting your digits frostbitten.
>
>So I told my "helpers" that I really appreciated their suggestions, but
that I
>would like to give the technet a chance to offer some guidance to me, and
that
>no-way were the suggestions from the TechNet going to be as good as theirs,
>but I wanted to see what popped up...and I would come to them if I needed
>anymore "help"...in other words, don't call me, I'll call you.
>
>I'm sure glad this is email, it would be kinda' hard to carry on this
>conversation with my tongue in my cheek like this...
>
>So, what's the verdict? Am I hosed? I looked around on the NET trying to
find
>the same spec'd diode with smaller lead diameters, but no joy. The only two
>companies I found were Motorola and General Instruments, and they both
listed
>the same thing that I have now.
>
>Is there any trick that any of you have done to make something like this
work?
>I'm afraid if I don't figure something out, I'll be in mittens spraying
diodes
>with freeze-it on the production floor...ya' gotta save me!
>
>-Steve "soon to be numb-fingers" Gregory-
>
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