bizarre pitch

[Joe And Penny Goss]

Hi Stephen, The thread ts usually a standard 1/8" pipe thread.
 However some tips will not work while others will. The problem is in the
depth of the thread into the tip head.
ABSCO made a lot of tips that were shallow drilled. They would fit their
stuff but were not interchangeable with Schaff.
Becuase they were not interchangeable we decided to use a better connection
and different thread with our new hammers.
Joe Goss RPT
Mother Goose Tools
imatunr@srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Stephen Birkett" <sbirkett@real.uwaterloo.ca>
To: "Pianotech" <pianotech@ptg.org>
Sent: Friday, January 14, 2005 6:41 PM
Subject: bizarre pitch


> Can anyone shed any light on:
> (a) the origins of the strange 30tpi pitch on tuning lever head/tip
> joint threads?
> (b) where to get a tap and die for threading this pitch?
>
> Stephen
> -- 
> Dr Stephen Birkett
> Associate Professor
> Department of Systems Design Engineering
> University of Waterloo
> Waterloo, Ontario
> Canada N2L 3G1
>
> E3 Room 3158
> tel: 519-888-4567 Ext. 3792
> fax: 519-746-4791
> PianoTech Lab Room E3-3160 Ext. 7115
> mailto: sbirkett[at]real.uwaterloo.ca
> http://real.uwaterloo.ca/~sbirkett
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