installing new knuckles

[Roger Jolly]

Hi Ted,
           Thank's for your wisdom as usual, I guess i've been back to
front for a long time. How ever as you point out, with high grade leather
it's hard to tell the difference.
Regards Roger


At 05:46 PM 14/12/98 -0600, you wrote:
>                      RE>>installing new knuckles                  15/12/98
>Every current action maker has the nap on the knuckles lie towards the
>hammershank center. In reality it does not weem to matter too much as most
>leather is hard to tell the  nap direction. The theory is that the jack
>will always return provided the center pin bushing, spring strength and
>lever height are satisfactory, and so there should be the minimum of
>friction during the downward keystroke. Of course, there are those who take
>a contrary view. I think it could only be proven by covering some knuckles
>with leather which has a heavy nap and conducting down and upweight tests.
>
>Regards, Ted_Sambell@banffcentre.ab.ca 
>
>--------------------------------------
>Date: 11/12/98 6:36 PM
>To: Ted Sambell
>From: pianotech
>If there is such a thing as the nap effecting the jack comming off the
>knuckle before let off, (on a sharp blow)----that would be the
>consideration. Otherwise what does it matter? My guess is that the jack
>should push against the grain for max push.....
>	If it is so important, then whoever mentioned that some knuckles have an
>arrow inscribed from the maker, has settled this question.  
>
>Ric, (the i stands for " In which way did that arrow go?")
>
>
>----------
>> From: kam544@earthlink.net
>> To: pianotech@ptg.org
>> Subject: Re: installing new knuckles
>> Date: Wednesday, December 09, 1998 9:23 AM
>> 
>> >...The smooth surface is oriented in
>> >the direction of the jack escaping for a smooth touch...
>> >
>> >Jon Page
>> 
>> I would never have thought I would have to ask this again, but it
>appears I
>> will have to do so.
>> 
>> This direction of the "knap of the knuckle" thing.  What Jon and Barrie
>> have mentioned does not ring correctly from what I thought I understood
>a
>> long time ago.
>> 
>> So.............
>> 
>> Which is it?  Smooth on the way out or smooth on the way in.  Is there
>> anyone who can officially settle this matter, please?
>> 
>> Keith McGavern
>> kam544@earthlink.net
>> Registered Piano Technician
>> Oklahoma Chapter 731
>> Piano Technicians Guild
>> USA
>> 
>> 
>> 
>> 
> 
Roger Jolly
Baldwin Yamaha Piano Centre
Saskatoon and Regina
Saskatchewan, Canada.
306-665-0213
Fax 652-0505