Tuning Pin Size

[Michiel van Loon]

Avery and list,
I just just measured 30 pins out of  2 sets of tuning pins.
One sets is some cheap Chinese brand labeled 6.9mm.
The other is Diamant Marke labeled 7mm.

Of the 30 Chinese pins 13 pins are 6.900mm
The thinnest pin measures 6.875mm +AD0- - 0.025mm
and the thickest measures 6.920mm +AD0- +- 0.020mm
So the biggest difference is 0.045mm.
Average size 6.900833mm

Of the 30 Diamant pins 4 pins are 7.000mm, 10 pins are 7.010mm
The thinnest pin measures 6.980mm +AD0- -0.020mm
and the thickest measures 7.015mm +AD0- +- 0.015
So the biggest difference is 0.035mm.
Average size 7,005500mm

Hope this helps.

Michiel van Loon
mvanloon+AEA-xs4all.nl
Meppel
Nederland

-----Original Message-----
From: Avery Todd +ADw-atodd+AEA-UH.EDU+AD4-
To: pianotech+AEA-ptg.org +ADw-pianotech+AEA-ptg.org+AD4-
Date: Friday, July 17, 1998 11:26 PM
Subject: Tuning Pin Size


+AD4-List,
+AD4-
+AD4-   Just finished measuring a set of tuning pins. The set was +ACI-labeled+ACI- 3/0,
+AD4-which is supposed to be .286. Well over half measured at .284. Next was
+AD4-.285 and an appreciable number of .283. There were actually only 3 pins
+AD4-that measured out at .286. Amazing. Can't this inconsistency be corrected?
+AD4-   I believe these came from Steinway. Are the Diamond Brand pins more
+AD4-consistent? Some other brand?
+AD4-
+AD4-Avery
+AD4-
+AD4AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8-
+AD4-Avery Todd, RPT
+AD4-Moores School of Music
+AD4-University of Houston
+AD4-Houston, TX 77204-4893
+AD4-713-743-3226
+AD4-atodd+AEA-uh.edu
+AD4-http://www.music.uh.edu/
+AD4-
+AD4-