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Helping a neighbor — need to fix this...

2346 Views 11 Replies 10 Participants Last post by  sreilly
I’m helping a neighbor fix something that his kid tried to “make better”... we all know how these things go...

Here is the problem: the screw that holds this wire to the connection was broken off at the head. That shiny/white little bit is what’s left of the screw. Somehow, that wire/connector needs to be screwed/attached permanently to its home. A quick solder was my immediate thought, but before getting out the hot tools, I thought I would throw this out there...

I have no idea how corroded the screw is inside the hole, or how tightly it is put in there (I would imagine it’s pretty tight if the head of the screw head is turned off). I just need to fix it. Thoughts?

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It might be that tight, it might have been severely weakened by corrosion. If that's on the top and not the side you might be able to eat some of the corrosion away with vinegar or Coca Cola (phosphoric acid). Then a drilled hole and an easy out might remove it. I'm partial to the left hand thread type easy outs as opposed to the straight fluted ones.
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It might be that tight, it might have been severely weakened by corrosion. If that's on the top and not the side you might be able to eat some of the corrosion away with vinegar or Coca Cola (phosphoric acid). Then a drilled hole and an easy out might remove it. I'm partial to the left hand thread type easy outs as opposed to the straight fluted ones.
That location is on a second “step”, a little ways down inside the case, but putting some vinegar shouldn’t be all that hard with a pipette.. I’ll give it a whirl...
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Or just drill it out, retap and put in a brass machine screw. You might have to go up one size (6-32 to 8-32)
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Michael, drill it before you apply the vinegar - if it gets loose, it may travel further in while drilling, and cause some damage underneath.
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agreed - drill it/tap it. I just learned how to do this recently and it works great!
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if the broken bolt moves when yur drilling it use a LH twist bit instead...
What type of object are we working on? It looks like a contactor, or part of a large appliance but I can't tell.


You might be able to find a replacement contactor for a reasonable price and save the worry of causing further damage.

If the component it is removable, I would work on the bench to prevent damage to anything else.

I would use a small LH drill if I had to save this one.
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Yup...I vote for drill 'n tap...
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It looks like batter corrosion which might make existing threads being virtually gone with the metals being electrically/corrosive siezed together. In that case I would try the drill and E Z out method first but would have a tap ready just in case. . The next size SAE tap (or vice versa) may be too big, so then look for a metric (or SAE) tap that would work
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Depending on the answer to Doug's question I'd replace if possible or drill if not.
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