I have a Broken ¼ - 20 broken carriage bolt with around 2 threads showing out my transom.
1 ½” is embedded in epoxy. An easy-out seems unlikely. I did four, three of them unscrewed successfully, but apparently I didn’t coat this one thoroughly enough with the Vaseline. I am thinking that if I can heat the bolt up to around 300 degrees or so, it will break the bond with the epoxy. A soldering iron seems *maybe* possible, but that is only one side. I was wondering if I could heat it up, like plumbers do with welders to melt frozen water lines, it might be an option. But I don’t understand enough about electrical resistance to know how to go about it. Using a battery for juice seems risky, having seen what happens when I have shorted them out with a wrench – I do have a 30 amp adjustable Powerwerks power supply, which seems a little safer. What I don’t understand, is if I can put a positive on one end of the bolt, and negative on the other, will it heat the bolt, or will it just melt the insulation off the wires? Or ruin the power supply? Or is it a factor of the gauge of the wires? Bill Coleman Entrada, Erie, PA
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