Re: [CAD_CAM_EDM_DRO] Long Acme threaded rod

On 06/17/2013 05:20 PM, Steve Blackmore wrote:

> They don't stretch.
>
> See
>
> http://www.gates.com/facts/documents/Gf000284.pdf
> or
> http://www.sdp-si.com/D265/PDF/D265T003.pdf
>
> Steve Blackmore

Well, they DO stretch, but so do 2" ball screws when enough force is
applied, but I doubt that you could measure the stretch on the belts
unless you were really careful! Stretch of a few tenths of a thousandth
of an inch per foot is not all that bad, but that is why there are
automatic tensioners on automotive timing belts.

However, if the stretch is small enough, who cares! There are bigger
errors to fight.

Dave 8{)

--

"A word to the wise ain't necessary - it's the stupid ones that need the
advice."

Bill Cosby