UHMW was Re: Backlash on acme leadscrew

Doug,

Be sure to test these uhmw "nuts" at different humidities and
temperatures... You may be surprised at the results.

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., Doug Fortune <pentam@h...> wrote:
<snip>
> A 3" long nut threaded from UHMW is about the same. I am
> currently experimenting with 6" thick threaded UHMW, and
> there is no discernable backlash, and are self-lubricating
> and quiet as a side benefit. There might be some backlash
> as the forces are built up over hundreds and thousands of
> pounds, but I haven't measured that yet. The tearout of
> 1" acme threads is 2000 lbs/linear inch, and so 6" would
> be good for approx 12,000 lbs before failure, so the plastic
> is not a concern there.
<snip>