Re: ballscrews...

> > My dilemma for the moment is if I should spend around $65 on a pair of
> > nuts and make my own preload, or buy a double nut with preload from
> > them for $150. Alternately, I could give up the LH operation and get
> > a one-piece preloaded nut for the precise RH screw for $190.
>
> Buy the ready made preloaded nut and use left hand threads. Is there a
> precision grade left hand version? My Southbend really needs a crossfeed
> screw...
>

Apparently not, at least not standard.

What size southbend? I'm working on a 13" model that came with a
5/8x8 screw. Screw is fine, nut is worn thin so it has nearly .040"
lash. I could replace the nut, but I'd like to get the ballscrews on
their to do simple curve-following CNC (basically, a software
tracer attachment). Problem is the channel the nut runs in isn't
very big.

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
30 Griswold Street, Cambridge, MA 02138
http://www.mdc.net/~stratton
(617) 492-3358 home/shop