Careful with the quoting there, you're actually quoting two people...

Thanks for the link though, I've been getting their e-flyer for a while now
and didn't know they had this kind of stuff.

Looks like 1/2 is the smallest dia they carry. That's a problem with little
systems. The friction goes up as a square of the radius of the rod
diameter, so smaller rod is very much better for smaller systems.

Thanks
-Denny


> Check ENCO TOOLS
> http://www.use-enco.com/CGI/INLMK3?PMK0NO=112025
>
> 1/2-10 X 6 FT is on sale for $6.99   Nuts are $1.31 each.
>
> I have never had a problem with the things I have bought from this
> company.  But keep in mind the stuff is for the occasional user.  If I
> was going to use the items in a production inviorment I would consider
> buying better quality.  but for prototyping things the price is right.
>
> Denny Esterline wrote:
>
> >>Hardware store threaded rod is not too bad, however, it's threads are
not
> >>made for moving nuts along, they are designed for binding and locking.
> >>
> >>
> >You
> >
> >
> >>will not be satisfied with the movement you get out of regular threaded
> >>rod, it will be jerky and have a lot of backlash.  If this isn't a
> >>precision machine, that might be OK.   I've used hardware store
threaded
> >>rod for stuff before, and been largely dissatisfied with what I got.
> >>
> >>The ideal thing is an ACME threaded rod, available through
McMaster-Carr,
> >>ACME threads are designed for driving loads along.  I don't know the
cost
> >>difference.
> >>
> >>
> >>
> >
> >I think you'd be more satisfied with the results of hardware store rod
if
> >you knew the cost of ACME rod. Here's an example I just looked up on the
> >Mcmaster web site:
> >
> >1/4 - 20, 1 start, 6 foot long, P/N 6350K133, cost $111.27 each.
> >
> >Let's not forget about the nuts:
> >P/N 6350K208,  $16.73  each.
> >
> >Compare that to about $5 for a 6-foot threaded rod, and a nickle for
nuts.
> >
> >I have used hardware store rod on my CNC hot-wire foam cutter. 1/4-20
and
> >nema23 motors generate more than 50lbs of push at ~1 inch per second. No
> >it's not as good as ACME can produce, but I built my machine for less
than
> >the cost of one ACME rod.
> >
> >-Denny
> >
> >--
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> >ways.  See http://www.piclist.com/#archives for details.
> >
> >
> >
>
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