Re: [CAD_CAM_EDM_DRO] Affordable ball screws

Time to show some stupidity, but why do we want to create the hydrodynamic
screw again? I remember it's something to do with not having to by true ball
screws. Seems like one of those money saving plans that actually ends up
with you having bought a brand new hydraulic pump and hundreds of pounds
worth of fittings by the end.

This one will probably write me out the discussion right away (Keep in mind
my newbieness to practical milling), but why can't the holes be drilled into
the nut? The way I remember it being arranged was the screw was sitting
between the bearings on each end of the table and passed through the nut on
the saddle. If you have holes all along the nut aren't you going to have oil
dripping out of 90% of it?

John H.

Milling out his toolpost thanks to John Stevenson. Hands full of swarf
splinters now! : )

> I really don't think this is very practical. A hydrostatic bedway slide

is a

> lot more doable, and, aside from the oil collection problem, could be
> implemented on many standard machine tool slides, as on lathes and
> mills. Recovering the oil without the chips and cutting lube is why
> the makers of these machines make them somewhat differently from
> the standard designs, so that the load bearing areas that have the
> oil galleys are always covered.
>
> Jon
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