Re: Drill bits
It seems to me that the question here is how good is the titanium nitride coating (which gives the characteristic gold colour). My guess is that on a quality drill, that will have been applied with great skill and to a thickness proven to be effective. On cheap drills, it seems likely it could be just a quick flash coating and has little or no effect, may not even be real TiN.
I have to say that when the going gets tough I always reach for cobalt drills.
When the going gets ultra tough I also reach for the small jar of cutting paste which came from one of the GEC companies ~40 years. Called "Chloro S", it is miraculous stuff which appears no-where on the Internet. Has anyone else encountered it?
B
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Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.
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