types of timing belts ( was Re: Guides

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "wayne_j_hill"
<wayne_j_hill@y...> wrote:

>
> I am also using the the XL belts on my CNC mill with no problem

with

> backlash or stretching.
>
> Wayne

I don't have as much experiance with timing belts, but Vee belts and
chains come with recomended tightening proceedures. most
manufactures recomend re-adjusting after a few hours of break-in.
something like 80% of the stretch comes out after 20 hours and the
next 20% takes like 1,000 hours.

I'd check the Gates site to see if they have an exact figure, but I'm
too lazy. but if you plan on using chains, the idea of keeping it
tight and putting in corrections in software would hold true.


Dave

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> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
> <davemucha@j...> wrote:
> >
> > > Now, if you want PRECISION and NON-slip/no-play in "timing
> > belt/chain" look
> > > to W.M.Berg's polyurethane-coated cable-chain series! That is
> > super stuff,
> >
> > I've seen the McMaster Carr belts (and bought a few) and the one
> SPI
> > has, but have not found a review of the different types, why one

is

> > better than another.
> >
> > this piqued my interest. Since I'm doing light duty XL belts are
> > fine and I have stayed with the lower cost variety because I just
> > don't know WHY I would need to get something better.
> >
> > can anyboy shed some light on the reasons why one needs a high $$
> > belt ? or why one is noticably better than another ?
> >
> > Dave