Re: Materials for machines. Was MDF for machines

--- In CAD_CAM_EDM_DRO@y..., ballendo@y... wrote:

> P.P.S. Another possibility is a "chemical grade" sheet plastic.

Don't

> use plain polycarbonate(Lexan, Tuffek are two trade names), as the
> hydrocarbons of the dielectric will weaken and "craze" it...

Acrylic

> might also work, and PVC sheet seems a (good)possible alternative.
>
> I suspect that the plastic alternative panels will not have
> the "stiffness" of the trespa or phenolic, so consider this when

you

> are deciding.

PVC is a pretty good choice in regards to chemical resistance,
however a good plastic to consider is Delrin (also known as Acetal).
From what I've seen it is pretty stiff and it is resistant to a lot
of chemicals. Another plus - it is relatively inexpensive. I can
check on it's resistance to dielectric fluid if someone can tell me
what is in it.

-Tom Murray