Re: [CAD_CAM_EDM_DRO] Making your own Ball nuts

Les,
I hadn't even thought of using the ballscrew material with the polymer
nut. I know that you can buy the screw material by the inch, from
McMaster-Carr, but other than it being a new screw, would there be any great
advantage over the acme screw? You might also ask the product people if
they've done any significant wear tests, to estimate the effective life of
such a nut. Could you explain preloading, and what it does?

Marv Frankel
Los Angeles

----- Original Message -----
From: "Les Watts" <leswatts@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, October 18, 2002 7:00 AM
Subject: Re: [CAD_CAM_EDM_DRO] Making your own Ball nuts


> Well, thanks for the complement Marv!
>
> Yes I think the cast polymer nut could work for acme as
> well as ballscrew material with the right o.d. clearance.
> Acme of course is not really the best for preloading
> but it can be done. It would have to be free of wear
> as well.
>
> Another thing that might be economical is just buy the
> ballscrew material without a nut- the nut is often most of the
> cost anyway. Then cast a polymer nut around it.
>
> If anyone is seriously interested in doing this I could talk
> to the Philly Resins product manager about the technique.
> I am afiliated with parent company of Philly and know
> some of those guys from corporate meetings. I will be back
> and forth to there as I am designing an encoder for another
> division.
>
> They seem to really know their stuff.
>
> Les
>
> Leslie Watts
> L M Watts Furniture
> Tiger, Georgia USA
> http://www.alltel.net/~leswatts/wattsfurniturewp.html
> engineering page:
> http://www.alltel.net/~leswatts/shop.html
>
> ----- Original Message -----
> From: "Marv Frankel" <dcdziner@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Friday, October 18, 2002 6:08 AM
> Subject: Re: [CAD_CAM_EDM_DRO] Making your own Ball nuts
>
>
> > Mark,
> > It's funny you should ask, because I received this info,
> > http://www.phillycast.com/products/inst-nut.pdf , from Les Watts, who
> seems
> > always willing to share his vast knowledge. It was in response to a
> question
> > from me, about making do with the original acme screws, until I was able
> to
> > convert to ball screws. These instructions seem to be applicable to
both
> > types of screws.
> >
> > Marv Frankel
> > Los Angeles
> >
> > ----- Original Message -----
> > From: "Mark Taft" <mark.taft@...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Friday, October 18, 2002 1:12 AM
> > Subject: [CAD_CAM_EDM_DRO] Making your own Ball nuts
> >
> >
> > > Hi everyone,
> > >
> > > Has anyone tried to making their own ball nuts,
> > >
> > > see link bellow.
> > >
> > > http://www.homecnc.info/cnc-main.html
> > >
> > > Perhaps they can share the experience.
> > >
> > >
> > > Cheers
> > >
> > > Mark
>
>
>
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