Re: cutting threads on lathe

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...
> >
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
> > Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> > List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com,
wanliker@a..., timg@k...
> > Moderator: pentam@c... indigo_red@q... [Moderators]
> > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> > OFF Topic POSTS: General Machining
> > If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach
it if you have trouble.
> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this
to be a sister site to the CCED group, as many of the same members
are there, for OT subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
EXCEPTIONS........
> > bill
> > List Mom
> > List Owner
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> --
> Kim Lux <lux@d...>