How to slow down power feed?

[Wongster]

Ed, this is the result of using the carbide insert tool with a little radius:





Much better than earlier. Still turning at spindle speed of 660 rpm with 0.1mm depth per pass.

The cutting oil I'm using left stain on my spindle flange...



John,

Thanks for your input. What's a "tipped tool"?

Now that I swapped in my carbide insert tool, I'm thinking of putting up the speed to the next notch at 1400 rpm and go at 0.1mm per pass. The 1" "soft" section is now at 0.75", I'll be turning down from here to the major diameter of 5/16" BSF for length of 5/16". Will the speed of 1400 rpm be too fast for this material? Not that finish is important here, I'm using this to test out what should be the right speed with the auto-feed of 0.07mm/rev.

Regards,
Wong