Why?

[Roger Jolly]

Hi Del,
       You just tweeked my gray mattter, I can see the problem of the
graphite out West starting to tighten bushings. Since in our neck of the
woods it is not often above 40% RH inside the average home, the hydoscopic
effect is not a problem. If fact at the University I can't ever remember it
being above 35%. In summer the air conditioning certainly dries things down.
 I think Barrie hit the nail on the head when he mentioned the cost/supply
factor. The respective companies will then extoll all the virtues, and
never mention drawbacks.
Regards Roger



At 10:27 PM 6/6/99 -0700, you wrote:
>Roger,
>
>I certainly agree with points 2, 3 and 4.  Unfortunately, I have not found
>their pinning to be all that consistent.  I think it is probably the
result of
>the graphite used.  Since graphite is somewhat hygroscopic these centers seem
>to be somewhat susceptible to variations in moisture.  We've also had more
than
>a few centers simply lock up tight after periods of hard play.  About point 5
>-- I do not consider hornbeam to be a superior wood compared to reasonable
>quality hard maple.  But it sure does machine pretty.
>
>Del
>
>------------------------------------------
>
>Roger Jolly wrote:
>
>> Hi Del,
>>        There is no doubt in my own mind that Renner shanks are superior to
>> any other that I've used, But there is a lot of variable's 1. Most
>> cosistent pinning, with graphite coating on felt, their pinning seems a
>> little firmer than most. 2. Higher quality machining far less travelling
>> required. 3. Superior grain orientation. 4. Higher quality knuckles than
>> most. (less cup in the leather) 5.Finally Hornbeam.
>>   Now for the $64.000 question. Does the material's account for the
>> difference, or is it superior machining tolerances?
>>   We have both studied Harold Conklin's film of hammer travel, it would be
>> interesting to see a similar film made with both materials and identical
>> machining tolerences.
>>   Another observation, when doing the drop/tone test on hammer shanks there
>> are far less rejects from Hornbeam. Is this the material or the selection
>> process?
>>   As I said before I'm going by gut feel.
>> Nice to hear from you as usual.
>> Regards Roger
>>
>>
>> At 07:36 PM 6/5/99 -0700, you wrote:
>> >
>> >
>> >Roger Jolly wrote:
>> >
>> >> Another variable is the quality of quarter saw and straightness of grain
>> >> within the shank it self.
>> >> I have a gut feel that is why the Renner Hornbeam shanks are superior to
>> >> the maple. I may be out to lunch on that one, just guessing.
>> >> Regards Roger
>> >
>> >----------------------------
>> >
>> >And who -- besides Renner, that is -- really believes that hornbeam shanks
>> are
>> >superior to even relatively decent maple shanks?
>> >
>> >Regards,
>> >
>> >Del
>> >
>> >
>> Roger Jolly
>> Balwin Yamaha Piano Centres.
>> Saskatoon/Regina.
>> Canada.
>
>
>
>
Roger Jolly
Balwin Yamaha Piano Centres.
Saskatoon/Regina.
Canada.