Re: vibration damping materials

Allan,

Anocast by Anorad is one source. It was used by Light machines
corporation in their Spectralight cnc mills, and got a lot of
industrial press a few years back...

Try also Ciba-Geigy for similar material(s)

Hope this helps,

Ballendo

P.S. Greg Pettingill (Cote design) did some work with metal filled
urethane for Dennis Bohlke at Super-tech. Bohlke's Roborouter is made
of castings of this stuff...

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "allan_reinhard
<allan_r9@h...>" <allan_r9@h...> wrote:

> I've been looking into this problem for my own designs, and have
> considered 2 ideas. One is pouring expanding concrete (concrete
> mixed with iron powder - as it cures it rusts, expanding slightly

to

> offset the shrinkage concrete usually has) into the structure, and
> the other is the relatively new material called mineral casting -
> usually a granite aggregate with an epoxy binder. This generally

has

> 6-8 times the vibration damping of cast iron. I have not been ably
> to find a source of the mineral casting though - it seems to be a
> large industry process only - not available to the little guy.

Maybe

> check with a local architect or masonry supply for mixable ideas

that

> can dampen vibrations in a structure.
>
> Allan
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "jim davies" <jdavies@a...>
> wrote:
> >
> >
> > > Hi Tony,
> > > From what I've heard (for what that's worth, but having no
> first
> > > hand experience with it), lead shot, although providing a nice
> heavy
> > > material will tend to 'pack' over time because of its'
> > > relative 'softness'. It remains heavy, but looses the ability

to

> > > absorb vibration, when 'packed'; it will just transmit it. I

have

> > > seen bags of lead shot used for temporary dampening purposes
> though.
> > >
> > Leaving the shot in the bags could reduce the amount of packing.
> Another
> > workaround might be to use the largest size available. Of course,
> steel shot
> > is now available and is larger in size and harder.