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Cleaning Corroded spark gaps
Posted: Sat Jun 30, 2018 4:18 pm
by Mike Westbrook
I got my little Miller hf 251 out the other day and for the first time It wouldn't make hf so I opened up the back and noticed that the gaps are super corroded my question is what's the best way to clean them without damaging them
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Re: Cleaning Corroded spark gaps
Posted: Sat Jun 30, 2018 10:34 pm
by Otto Nobedder
I like to remove them completely, chuck 'em in a drill press (a mill is better), and run them against a flat stone like you'd sharpen a knife with.
Steve
Re: Cleaning Corroded spark gaps
Posted: Sun Jul 01, 2018 7:18 am
by Mike Westbrook
Thanks for the input I think that's what I'll try I have some 1600 grit that may work in the drill press I just wasn't sure if they had a mirror finish to them or it they looked smooth gray like a tungsten if you read the manual it basically says to toss them and get new at this point it's worth a try if not a new set is around 50.00 .......thanks
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Re: Cleaning Corroded spark gaps
Posted: Sun Jul 01, 2018 3:27 pm
by Mike Westbrook
Chucked them in the drill press and wet sanded with 1600 grit then cleaned with acetone worked perfectly !
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Re: Cleaning Corroded spark gaps
Posted: Mon Jul 02, 2018 6:22 pm
by Otto Nobedder
Glad to hear it, Mike!
I don't recall where I got that tip from, but it was probably here. I use this method at work as our machines see a lot of abuse, and it's always worked for me, even with the sloppy, worn out, 10-year-old Harbor Freight drill press we have.
Steve