[CAUT] Which S&S replacement action parts?

[Dan Reed]

I always repin with 'added' teflon, brushed on the pin, and transfered 
to the bushing( both sides)...I can repin a bit tighter that 
way...seems to work.

Dan Reed
Dallas 101 degrees  in the shade...


On Jun 28, 2008, at 8:15 AM, David Love wrote:

> I find the best method for getting precise and stable pinning is to
> vigorously swing the hammer assembly while holding the flange after 
> pinning.
> That means you pin slightly tight and then with the flange held 
> between your
> thumb and index finger swing the hammer vigorously through it's entire
> rotation at least 10-12 times.  You first experiment with different 
> sized
> reamers to determine just how tight the pin should be right after you 
> insert
> the center pin.  Swinging the hammer will polish the bushing felt (and 
> maybe
> heat it up a bit) and take off that last bit of excess friction without
> leaving the pinning loose.  After that the friction seems to be 
> relatively
> stable.
>
> David Love
> davidlovepianos at comcast.net
> www.davidlovepianos.com
>
> -----Original Message-----
> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of 
> David
> Ilvedson
> Sent: Saturday, June 28, 2008 12:03 AM
> To: caut at ptg.org
> Subject: Re: [CAUT] Which S&S replacement action parts?
>
> All modern Steinways after CBS have teflon impregnated bushing cloth?
> Hamburgs are Renner and have the graphite...which is fun also...
> I mentioned the same thing...I was thinking the previous center pin 
> had been
> buffed by the bushing cloth and lost friction.
> I am lubing the centers and pinning tight...I disregard the swing test
> completely.
>
> David Ilvedson, RPT
> Pacifica, CA  94044
>
> ----- Original message ----------------------------------------
> From: "Fred Sturm" <fssturm at unm.edu>
> To: "College and University Technicians" <caut at ptg.org>
> Received: 6/27/2008 4:36:27 PM
> Subject: Re: [CAUT] Which S&S replacement action parts?
>
>
>> Hi Chris,
>> 	Yep, I have the same problem. Nope, I don't have an answer or a
>> procedure. It is definitely different to work with. The first thing
>> that really puzzled me was when I found that I could remove a pin, and
>> the same size pin would feel tight enough or even too tight (pushing
>> it into the felt by hand). So I tried reinserting the same pin
>> (Steinway pin, with the rounded edges). And, sure enough, the friction
>> had gone from 0 - 2 gm to 4 gm. Just removing and replacing it. I
>> guess the felt/teflon expanded while the pin was out. The friction
>> level went back to 0 - 2 gm overnight.
>> 	So what do I do? Mostly, they seem to stay firm (feeling the end of
>
>> the hammer for wobble) for a good long time. If I get wobble, I repin
>> with the next larger size. I ignore friction measurements, as long as
>> it swings freely enough. Firm by feel and swing free is my only
>> parameter. I won't say I am comfortable with this exactly, but I find
>> I can regulate to the low friction okay (over the years I have got
>> pretty good with butterfly springs). I like it better than the solid
>> teflon, which always had/has too much friction if I just ream with the
>> prescribed size reamer, and too little friction if I use an
>> intermediate (.0005 above pin size as oppose to pin size to the .001).
>> 	I'm just out there trying to make things work, and it seems like
> it's
>> easier to go with the flow than to fight it. And it seems to work
>> okay. So I have tried to alter my "inner imagination" to conform with
>> it.
>> Regards,
>> Fred Sturm
>> University of New Mexico
>> fssturm at unm.edu
>
>
>
>> On Jun 26, 2008, at 8:41 PM, Chris Solliday wrote:
>
>>> Fred, I have problems when reaming (hard to imagine that some need
>>> it with
>>> free and firm and teflon) this cloth. Do you? I haven't found a
>>> really good
>>> burnishing technique or sizing solution. Have you?
>>> Chris Solliday rpt
>>> ----- Original Message -----
>>> From: "Fred Sturm" <fssturm at unm.edu>
>>> To: "College and University Technicians" <caut at ptg.org>
>>> Sent: Thursday, June 26, 2008 10:05 AM
>>> Subject: Re: [CAUT] Which S&S replacement action parts?
>>>
>>>
>>>> On Jun 25, 2008, at 7:47 PM, Barbara Richmond wrote:
>>>>
>>>>> I haven't worked on many newer Steinways with the low friction but
>>>>> firm
>>>>> cloth.  Actually, I have strips of it and I haven't figured out yet
>>>>> how
>>>>> anyone has determined that it is so firm.
>>>>
>>>> Hi Barbara,
>>>> The felt itself isn't particularly firm. In fact, it might be on the
>>>> spongy side. After the parts are pinned, the centers are dipped in a
>>>> solution of a teflon-like substance. It hardens in the felt. Around
>>>> the edges of the dipping baths, there is white substance where the
>>>> solvent has evaporated and left the solids. It feels much like what
>>>> you get if you let McLube evaporate.
>>>> The firmness of the bushings comes from impregnation of the felt 
>>>> with
>>>> the lubricating substance.
>>>> Regards,
>>>> Fred Sturm
>>>> University of New Mexico
>>>> fssturm at unm.edu
>>>>
>>>>
>>>
>