Diamond coated cutters/bits cutting steel

[Joseph]

Al, I think it must have been spinning around 3000 to 5000 RPM. That yellowish color on the rim of the blade could maybe indicate titanium instead of brass. Or maybe bronze.

[Lenp]

As an aside....

Hands up who knows what a 'Thread Restoring File" is? (No fair Googling!)

Len

[MrAl]

Hi Len,


I'll take a guess: a triangle shaped cross section file? Just a guess though.

[MrAl]

Hi again,

I did a little more cutting with a small diamond wheel and it seemed to cut pretty well into
some slightly hardish tool steel. It didnt seem to bother the wheel, but what i did was
i took 'little cuts' by pushing the wheel into the workpiece and then backing out, then
pushing again, then backing out again, etc., to help keep the wheel cool.
I have to say it cut really nice, and i was able to grind a new tip on the tool. It
was a phillips head driver bit that had been worn very very badly so that the first
1/8 inch of the tip had to be cut or ground off and a new tip formed.
I was able to use some diamond files to finish up the new tip.

This was more of an experiment than anything else, but gee now i have a new
phillips screw driver bit