UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Bazz4CQJ · 25th Feb 2019, 7:53 pm

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

25th Feb 2019, 7:53 pm	#10
Bazz4CQJ Dekatron Join Date: Apr 2009 Location: Oxfordshire, UK. Posts: 4,934	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 __________________ Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.