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Another way to make spark plugs

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gldwight:
George:
That's beautiful work!!

George

madjackghengis:

--- Quote from: NickG on January 04, 2010, 07:07:19 AM ---George,

When I was buying some metal over the weekend the guy there mentioned freezing ptfe before machining it and it behaves more like metal. Have you ever heard of this or tried it? By the looks of your thread you don't need to as long as you take light cuts etc.

Nick

--- End quote ---
Hi Nick, I was just reviewing George's log on spark plugs and noted your statement.  I've used that method, with a liquid freeze spray to supplement the keeping it cold while turning, with rubber, for high voltage electrical isolation, and it does work.  The best way is with dry ice, but a freezer that has a really cold corner is almost as good.  Part of the problem with teflon, is when it does get hot enough to burn, it leaves a residue heavy with carbon, and conductive.  :thumbup: mad jack

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