Re: [CAD_CAM_EDM_DRO] McMaster ballscrews

----- Original Message -----
From: "Smoke" <Smoke@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Saturday, December 16, 2000 2:17 PM
Subject: Re: [CAD_CAM_EDM_DRO] McMaster ballscrews


> What's the Web addy for Mcmaster Carr? I'd like to see if I can get a
> catalog.
>
> Smoke
> -----Original Message-----
> From: Tim Goldstein <timg@...>
> To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
> Date: Saturday, December 16, 2000 1:43 PM
> Subject: RE: [CAD_CAM_EDM_DRO] McMaster ballscrews
>
>
> >I can't explain the why of the pricing other than to guess that it has to
> do
> >with production quantities.
> >
> >I am using the 5/8" shaft on my Shoptask and on another project. The nuts
> >have no preload as they are single nuts, but if you buy 2 per axis you
can
> >easily make your own preloaded nuts. The screws are actually Thompson
> >Saginaw and with a single nut will have .005 - .009" or so of backlash.
> >
> >Tim
> >[Denver, CO]
> >
> >> Greetings to you all;
> >>
> >> Thumbing through the McMaster catalog I noticed some weird
> >> pricing on their
> >> ballscrew assemblies. For instance -
> >>
> >> 1/2" screw at $2.21 per inch. The nut is $129.26.
> >>
> >> 5/8" screw at $1.02 per inch. The nut is $19.50.
> >>
> >> 3/4" screw is $1.68 per inch in .25" and .5" lead, but the .25"
> >> lead nut is
> >> $34.57 whereas the .5" lead nut is $131.31.
> >>
> >> What gives?
> >>
> >> Also, has anyone used these screws? The catalog doesn't say what level
> of
> >> preload, if any.
> >>
> >> Doug Harrison
> >> FAQ: http://www.ktmarketing.com/faq.html
> >
> >
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> >
> >
> >
>
>
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
discussion of shop built systems, for CAD, CAM, EDM, and DRO.
>
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