Re: ATM parting with no worrys

["Don Clement" <clement@san.rr.com>]

In addition to minimizing the unsupported compound, use only as much
unsupported parting tool is as is needed. I adjust the parting tool length
to just be enough to make the part.
I have seen, but never used a parting tool called a "goose neck". The goose
neck tool has compliance or springiness to it. If the parting tool begins to
dig in, the goose neck gives a small amount to prevent tool breakage. There
is also a similar tool for threading.

Don Clement
San Diego/Running Springs

>
> DANGER
> ALWAYS have the compound rest backed off so that it is fully supported
> beneath the "T" slot. Some lathes, like mine, you can crank the compound
> out so the "T" slot is only about half supported, so when the parting tool
> grabs, the front half of the "T" slot and the tool holder drops into the
> chip pan. I've seen this on two lathes and it ain't pretty.
> Always align the tool so that it is perpendicular to the axis of the lathe
> or parallel to the axis of travel and it will bind less.
> good luck, john
>
>
> >Hello Bill,
> >
> >Parting off is not necessarily difficult. On the larger more rigid (>=12"
> >swing) lathe using the parting tool in the same side as the cutting tools
> >work best for me. I use a KDK 100 toolpost with a 104 parting bar. Very
> >rigid setup. I always lock the compound and carriage. NEVER use a center
to
> >support work when parting. For smaller less rigid lathes it is best to a
> >rear toolholder with the parting tool upside down. Use cutting fluid.
> >
> >Don Clement
> >San Diego/Running Springs
>
> John B. Wallace
> 12 Foot Pressure Wind Tunnel
> NASA Ames Research Center
> Ms. 206-1
> Moffett Field, Ca. 94035-1000
> 650-604-1451
>
>
>
>