RE: [CAD_CAM_EDM_DRO] Re: Z Axis Lubrication

Hi group members
What's 60 degree thread? Isn't this standard screw?
Short time ago I asked about using this type instead of ball screw and get
negative opinions.
What's now?
Peja

-----Original Message-----
From: ralaco [mailto:ralaco@...]
Sent: Wednesday, April 30, 2003 7:05 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Z Axis Lubrication


Dear Jon:

>If mill, is that a knee screw, quill screw, or head lifting screw?

It's a 5 x 8 feet Router.

>Is the screw shielded, covered, with bellows, or out in the open?

The Lead Screw it's open.

>Ballscrew, Acme or 60 degree thread?

It's an Acme from Nook, Bronze Nut.

Regards
Raul Lara

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:
>
>
> ralaco wrote:
>
> >What's better to lubricate a Z axis lead screw, Grease or oil?
> >
> >
> Z axis screw? On what kind of machine? If mill, is that a knee
screw,
> quill screw,
> or head lifting screw? Is the screw shielded, covered, with
bellows, or
> out in the
> open? Ballscrew, Acme or 60 degree thread? It all makes a
difference.
>
> If the screw is mostly shielded from chips and dust, grease would
be
> good. A
> very good lithium or Molybdenum disulfide grease would be good for
Acme
> or 60 degree threads. Lithium may be best for ballscrews, as some
> people have
> had the balls slide and develop flat spots when using moly grease,
it is
> so slippery
> the balls won't roll!
>
> Machines with autolube or single-point lube systems usually use way
oil
> on the
> ballscrews, although I'm pretty sure it is not the best lube for
them.
>
> Jon


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