[ Don Cox wrote in 050914 MMDigest:

> I have found PTFE to be a good lubricant for wood-on-wood; there
> are various aerosols on the market.

I have wondered about this.  Thank you.

> Another possibility is to make small pegs from PTFE rod and insert
> them in holes in the wood so that they are just proud of the surface.
> It all depends on the shape and movements of the parts.

Mr. Reblitz' piano book mentions that Steinway once used a Teflon or
Nylon bushing in its piano actions.  It seems like a fine idea, but
it turned out that while the wood around the plastic insert shrinks
and swells with changes in humidity, the insert does not.  This causes
difficulties like cracks.

Mark Kinsler