Re: Need help designing ballscrew

Pics would be great...


Wally



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "bazer_20002000"
<Fredwick@b...> wrote:

>
> Do you mean for a Boss/interact series? if so what ball screw? (X-Y-
> Z) I may have some pictures if that would help?
> Fred
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "cnc_4_me" <cnc4me@g...>
> wrote:
> >
> > I would like some advice from those of you who have seen factory
> CNC
> > ballscrew setups for Bridgeport type milling machines...
> >
> > What i want to know is the lash up of nuts, washers ect between
> the
> > bearings and the pulley.
> >
> > To be more specific, after the 2 angular bearings there is a fine
> > pitch thread for a nut to tighten up the bearing pair. I am
> thinking
> > of making it 20mm x 1.00
> >
> > A few things i want to know is.
> >
> > 1. How long does the nut have to be to take the force of preload
> > tension on the bearings.
> >
> > 2. What kind of hardware is usally employed...As in type and
> > order...Like bearing-groundwasher-lockwasher-nut...Or does the

nut

> > tighten on the bearing...Or is there 2 nuts to tighten against
> each
> > other...ect
> >
> > The bearing house has 2 stock nuts at the 20mm x 1.00 size
> > one is about .252 inches long for $3.38
> > another is .512 inches long for $16.85
> >
> >
> > Wally