durometer question

[Ray]

Hi Annie,

The Shore A2 durometer is the one used in the industry. It was made to test
the surface hardness of rubber. To test hammers, you will need to build a
jig with a constant drive so that the pressure put on each hammer is the
same, otherwise the readings will be meaningless. It will not tell you
anything about the sound the hammer will produce.

Ray Negron


____________________________________________________________________________
_
 
Ray Negron
Ronsen Piano Hammer Co.
ray at ronsen-hammer.com

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Annie Grieshop
Sent: Sunday, April 29, 2007 9:15 PM
To: Pianotech
Subject: durometer question

Can anyone tell me which type durometer I need to test hardness of piano
hammers?  I'm guessing Type A with a cone indenter (conical or truncated?),
but I'll bet somebody on this list knows exactly what I should get.  Thanks.

Annie Grieshop