Homebrew PCBs

> Any ideas how to make bearings for the sprayer tube out of CuCl
> compatible
> materials? A titanium rod maybe turning in some plastic (non
> nylon)? Would
> that seize up or would the etchant-cooling be enough?
>
> ST
>


You can get all sorts of non-metal bearing (ball), including ceramic,
plastic & glass.

From memory, you can get bearings that have glass balls with plastic body,
and are used in food preparation things.  No lubrication to prevent
contamination, and can be washed clean with water.

Look for 'food grade' bearings.  Very low RPM, maybe 200-300 RPM.

Tony