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Re: Engineering 101

To: Rush <jdrush@enter.net>
Subject: Re: Engineering 101
From: Michael Porter <portermd@zianet.com>
Date: Tue, 26 Jul 2005 01:52:15 -0600
Rush wrote:

>
> Stay away from allthread rod. Most allthread rod is made to a very low 
> standard and won't be up to moving 1000 lbs for long. Without more 
> info, I cannot give you many more ideas, but have you looked at ball 
> screws? They are designed from the get-go to haul heavy loads along 
> the shaft axis and can be had for next to nothing you know where to look.

Just to amplify on this a bit.  Ball screws are inordinately expensive 
new (depending upon diameter, over $100/ft).  The reason for this is 
that their most typical use is in precision machining and positioning 
devices which must maintain indexing to exceedingly small tolerances.  
However, a ball screw which is far too worn for that purpose may still 
be quite useful for the purposes described in the post.  The "where to 
look" would include rebuilders of precision machining equipment, custom 
machine builders or machine shops with CNC machining equipment which do 
their own equipment repairs.

Cheers.

-- 
Michael D. Porter
Roswell, NM

Never let anyone drive you crazy when you know it's within walking distance....






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