Re: [CAD_CAM_EDM_DRO] Re: MiniMills&Ballscrew?

Where is a good place to get then?

----- Original Message -----
From: "Hugh Currin" <currinh@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, January 15, 2002 8:48 PM
Subject: [CAD_CAM_EDM_DRO] Re: MiniMills&Ballscrew?


> Dave:
>
> I looked around some when selecting a ball screw retrofit kit for my mill.
I
> looked at both kits and non-kit ballscrews. Considering both cost and
> availability I went with Rockford Ballscrew. They also had a kit for my
"not
> quite Bridgeport" mill. I've been happy with their kit.
>
> I recently purchased a ballscrew and anti-backlash nut for my Z-axis
> retrofit. I went back to Rockford for these. This is their R-30 screw
.651"
> OD. The costs were $123 for the nut, $16.50/ft for the screw, and an $8
cut
> change. This was for their "precision" rolled ball screw. Their standard
> ballscrew was $11.50/ft. I suspect the "precision" is just measured and
> selected from the standard. I believe these were speced at .002" or .003"
per
> foot. I haven't put these together yet, the nut is still off the screw as
I'm
> in the middle of building the Z-axis.
>
> There is a real break between rolled and ground. The rolled are less
> expensive but not as accurate. The ground are very expensive and quite
> accurate. If the price you see is out of bounds, it's probably a ground
> screw.
>
> That's my experience. Hope it's of some help. :-)
>
> On Tuesday 15 January 2002 04:22 pm, you wrote:
> >
> > Could someone point me in the direction of suppliers for zero backlash
> > ballscrews and nuts for a project such as being discussed? Anyone
willing
> > to put forth a general range of prices I should expect to see (so I
don't
> > either pay WAY too much or don't waste my time searching for a "better"
> > deal)
> >
>
> --
> Hugh Currin, PE
> Oregon Institute of Technology
> Klamath Falls, OR
>
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