Caster Cups

[Jeannie Grassi]

Hello All,
This question which follows was faxed to me.  Please respond if you have
some comments that would apply. Thanks,
jeannie

Jeannie Grassi, RPT
Assistant Editor, Piano Technicians Journal
mailto:jgrassi@silverlink.net


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"Over the years I have acquired a collection of caster cups.  They are of
wood, glass, composition wood, celluloid and metal (brass).  How do the
different materials enhance or inhibit the sound on a rug, a hardwood floor,
or cement?  What about spiders and rubber wheels on stage pianos?  Thank you
for your help and time."

Helga Kasimoff
Associate Member
Los Angeles