Thanks Steve;
It is a new lathe with inserts. They are all positive rake without
chip breakers. Finish cuts were very stringy.
The old lathe only had hand ground bits, mostly negative rake.
Problem solved.
Don
On Sun, Feb 27, 2011 at 3:30 AM, Steve Blackmore <st...@pilotltd.net> wrote:
> On Sat, 26 Feb 2011 22:34:48 -0500, you wrote:
>
>
> >Is there a G code to break the mile long Slinky produced while
> >turning a part on the lathe; similar to G73 for drilling?
>
> Hi Don - you shouldn't be making long ribbons, but with some materials
> it's hard to avoid.
>
> Increase Feed, depth of cut or speed or a combination of those that
> suit.
>
> If your lathe cant handle more depth of cut, just increase feed.
>
> Use a chip breaker tool.
>
> If it's a home ground tool, grind a groove behind and parallel to the
> cutting edge. If inserts, read the manufacturers specification and try
> and cut as recommended.
>
> On small lathes it's often impossible to attain suggested feeds and
> speeds, if that's the case use finishing inserts with a tight chip
> breaker groove and up the feed rate for roughing.
>
> Use a negative rake tool - only problem is they generally need more
> depth of cut and feed.
>
> Sadly, the lack of jog in feed hold doesn't make it easy to remove them!
>
> Steve Blackmore
> --
>
>
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