Re: cutting threads on lathe

fine',

If you only intend to use the lathe for threading the ends of your
pipe then save yourself some time/money.

Buy a small turret lathe or conventional lathe with bed turret and
thread with a die head. It'll be as fast or faster than CNC.

Doug



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "fineartlight" <yahoo@d...>
wrote:

> Thank you all for the input and am now thinking a little more
> seriously about buying a lathe for a CNC conversion. I have two

size

> requirements for threading lipe for my lighting company.
>
> 1. 1/2" dia. aluminum pipe 1/4 IPS 3" long and 5" long with 1/2"
> threads "20 TPI" on one side and about 3/8" on the other.
>
> 2. 1/8 IPS up to 9"-10" long with 5-6 threads only on one end. I
> think this will maybe also be in aluminum. Right now I am using

brass

> and not sure the strength will be enough.
>
> I will have two gecko 320's, one amatek servo motor, for hardware

to

> start.
>
> Which make or model should I purchase? I want a small desktop
> version and as inexpensive as possible as I don't think I'll use

it

> for anything else.
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Kim Lux <lux@d...> wrote:
> > We are running a CNC lathe with TurboCNC. It has a G33 Gcode

that

> > allows allows threading. It works well, very well. Very fast

too,

> ie
> > we are threading down to 14 TPI at 750-1000 RPM. The limiting
> factor to
> > threading speed is how deep you can take the cuts.
> >
> > The issue I see with your threading is the thinness of your
> material. I
> > think you'll have to set up a steady rest to keep it from bowing
> out,
> > depending if you are threading the whole 12" or just the ends.

(Not

> > clear to me from your statement.)
> >
> > You could thread shorter sections (ie ends) of said material in

the

> mill
> > using TurboCNC and its thread *milling* commands. CNC equipment

is

> > outstanding these days...
> >
> > We've got an autofeed system half completed for our lathe, but

it

> feeds
> > long lengths of bars, not 12" pieces. Maybe you could buy long
> lengths
> > and cut them off to length.
> >
> > Kim
> >
> >
> > On Mon, 2003-10-06 at 09:53, fineartlight wrote:
> > > I am a small lighting manufacturer with one CNC mill running

and

> now
> > > considering building or purchasing a lathe to thread 12" long
> 3/8"OD
> > > 1/8 IPS tubing. Could be thin wall steel, brass or aluminum.
> > >
> > > Questions are:
> > >
> > > 1. With a lathe is CNC the way to go for threading and cutting?
> > > 2. Is a small cnc lathe with a auto feeder a realistic
> possibility?
> > >
> > > What are my other options for threading the tubing? I have

seen

> > > something called an Automat ? What is it?
> > >
> > > David.Munson@F...
> > >
> > >
> > >
> > >
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this

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