Re: Cheapest Bridgeport Ballscrew sets?

Are these ballscrews really zero backlash?....They look like single
nut screws...Also was a drawing supplied for the screws.

Wally



--- In CAD_CAM_EDM_DRO@yahoogroups.com, Stephen Wille Padnos
<spadnos@s...> wrote:

> I bought mine on eBay from Machine Tools Direct for $640, but

they're

> $599 now.
>
> Their website is www.machinetoolsdirect.net, though it isn't that

useful.

> Their eBay store is
> http://stores.ebay.com/Machine-Tools-Direct_W0QQsspagenameZl2QQtZkm
> There is a set of ballscrews on auction here:
> http://cgi.ebay.com/ws/eBayISAPI.dll?

ViewItem&category=25290&item=3865827010

> or search for "ballscrews 9 42" (without the quotes), and it

should be

> the only auction that comes up.
>
> These are good ground screws, new in the box (from China,

manufactured

> in 1985). The set includes the two screws (with nuts) and the

yoke.

> There's plenty of cosmoline on them - get yourself a Costco sized

can of

> WD-40 before you open the box :) Mine came with test reports,

which

> were pretty good (0.00023622 lead error per foot (and overall) for

the

> short one, and 0.00043307 for the long one).
>
> The only problem that I have with them is that the longitudinal

screw is

> a little too long - I'll have to make my motor mount act as a shim
> between the bearing bracket and the table (it needs between 0.2 and

0.4

> extra inches).
>
> I have no affiliation with MTD, I just happened to find them when I

was

> in the same boat as you, and I'm happy with my purchase.
>
> - Steve
>
>
> cnc_4_me wrote:
>
> >I am looking for the exact same thing...Started making phone calls
> >today...I will let you know what i find out...Keep me informed

what

> >you find out...
> >
> >I know that sets start out around $750 for ballscrews with rolled
> >threads .004" out per foot max error....Skys the limit for
> >ground .0005" error per foot....I am looking for happy medium...
> >
> >Wally
> >
> >--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
> >wrote:
> >
> >
> >>Anyone know of a good source for low-cost ballscrew sets for a 9

X

> >>
> >>
> >42 Bridgeport?
> >
> >
> >>Ron
> >>
> >>