Re: Need ballscrew support Bearings.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@...> wrote:

>
> Scott,
>
> What if you were told that, "NO, it wouldn't be noticeable. But
> you'll wear your ballscrew and ballnut more by doing as you're
> suggesting..." Would that change your mind?

Well Ballendo, I am interested in why this would wear my ballscrew
and ballnut faster?
I guess I might change my mind if I knew to what degree it would
wear my ballscrews down.

>
> P.S. Define "hobbyist machine" and "heavy usage". Are you talking
> loads, duty cycle or both?

Well, it is certainly not going every day for 8 hours. Maybe
once a week on average for 8 hours.

Thanks,
Scott

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Polaraligned"
> <polaraligned@> wrote:
> >
> > It is a BOSS machine.
> > I need 2 pairs of bearings the sizes listed, mounted back to back
> > for each axis. The "undriven" end of each ballscrew just floats.
> > I am comitted to these sizes unless I do some machining. (Not!!)
> > The matched pairs have a 60 degree contact angle
> > so they can take a much larger axial load than a lesser contact
> angular
> > contact bearing. They are back to back and preloaded to eliminate
> > end-play due to the bearings. I just don't want to spend $$$ for
> > a pair of these if there is really no gain that will be noticable.
> >
> > Thanks,
> > Scott
> >
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@>
> wrote:
> > >
> > > Scott,
> > >
> > > Just a single DRAC bearing per axis is sufficient. On the X,
> only
> > the driven side needs one. The other end of the screw just floats
> in a
> > standard bearing. The bearings are a bit pricy, about 40 a piece.
> > Standard endplate bearings being referenced.
> > >
> > > Ron
> > >
> > > Where is there a bearing thats 3.15" OD X 1.968" ID at on a
> > Bridgeport series 1? Or is this a cutom set up? Or is this a Boss
> machine?
> > >
> > > Polaraligned <polaraligned@> wrote:
> > > For a BP series 1 CNC machine.
> > > I need new ballscrew support bearings for both the X and Y axis.
> Big
> > > question is if a matched set of the special "ballscrew support"
> > > bearings are worth the extra money? (probably $400 per pair)
> > >
> > > Will I really be able to notice a difference in performance if I
> just
> > > use 2 "unmatched" angular contact bearings? Will they wear
> prematurely?
> > >
> > > This is just a hobbiest machine and will not see heavy usage.
> > > The bearings I need are:
> > >
> > > Y- 52mm od, 25mm id, 15mm wide
> > >
> > > Thanks for any help.
> > > Scott
> > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>