On 9/8/2014 3:06 AM, mike wrote:
snip
I bought the $4 HF set of carbide tools. Work pretty well
on straight cuts,
but the first thing I want to do is turn a square into a round.
Interrupted cut is not recommended, so I'd rather not break 'em.

snip

Thanks,
mike

Mike - like on wood the square to round is nasty to do.

I'd hand grind the 'points' down so the round is almost there
and then turn the final part on the lathe.

Saves lathe parts and uses a cheaper grinder part.

On wood I plane or file down the corners to get the job going.

Martin