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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