Re: Need ballscrew support Bearings.

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?

Hope this helps,

Ballendo

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

--- 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]
> >
>