[CAUT] Knuckle Direction

[G Cousins]

How the nap about one way for the naturals and the other for the sharps.
Hmmm. Another test statistic???  I'll nap while y'all ponder.
I'm still napped out from my daughters wedding this past weekend.

Gerry C
WCUPA

> 
> Hi Paul,
> 
> I've heard both arguments "this way and the jack slips out better" and "that way and it gets returns better, especially on a soft blow". In a class I took years ago (can't remember who but he was good, and it made sense) he said his company did a lot of testing and it didn't seem to matter, but that they all should be the same. 
> 
> That being said, I just looked at some new Renner knuckles and they are installed so that the jack goes OUT with the grain and returns AGAINST the grain. To me this is counterintuitive. I looked at another piano and they were backwards from that. Go figure.
> 
> I bet Mannino has an opinion because those guys are testing fanatics!
>  
> Jim
> 
> -----Original Message-----
> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Dempsey Jr., Paul E
> Sent: Tuesday, June 01, 2010 1:58 PM
> To: pianotech at ptg.org
> Cc: caut at ptg.org
> Subject: [CAUT] Knuckle Direction
> 
> OK, maybe just too much week-end or perhaps old-timers....
> 
> I am re-knuckle-ing a set of grand shanks. The new parts are of Able manufacture and have a pencil line on each. 
> 
> Does this line face the flange or the hammer?
> 
> I know the line indicates the direction of the nap of the leather, but which way is preferable.
> 
> 
> 
> Paul E. Dempsey, RPT
> Piano Technician Sr.
> Marshall University
> Huntington, WV
> 304-696-5418
> 304-617-1149
> 
 		 	   		  
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