pinblock support in square grand

[JOHN ROSS]

If it was a tapered hole, and you were putting in larger pins. I would think 
that it would be a good idea, to untaper the hole, with a drill bit 
appropriate to the size of pin you were going to use.
Bigger isn't always better. Test for the friction you want.
Too tight is as bad as too loose.
John Ross
Windsor, Nova Scotia, Canada
jrpiano at win.eastlink.ca
----- Original Message ----- 
From: "Ed Sutton" <ed440 at mindspring.com>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Sunday, March 23, 2008 5:31 PM
Subject: Re: pinblock support in square grand


> What was wrong with the original pins?  If they were tapered, there is no 
> need to replace them.  One possibility is to spray a quick shot of steam 
> into the holes (this lifts the wood fibers a little), then swab them with 
> thin CA glue (to size them a little in the lifted position). Then restring 
> with the original pins (in the original holes if you kept them in order). 
> Just tap them enough to re-establish torque, nothing like the stress of 
> driving new pins.
>
> You said it was a Gilbert. A few months ago I examined a Gilbert square 
> which had been restrung with modern pins. The block was split along much 
> of its length. Driving an oversized, straight-sided pin into a tapered 
> hole is an excellent way to split a piece of wood.  If you don't have the 
> original pins, you need to use the smallest pin that will hold with a 
> light tap.
>
> Ed Sutton
>
>
> ----- Original Message ----- 
> From: "Anne Acker" <a.acker at comcast.net>
> To: <pianotech at ptg.org>
> Sent: Sunday, March 23, 2008 9:29 AM
> Subject: pinblock support in square grand
>
>
>>
>> Mark,
>>
>> You don't need to bash these pins in, nor should they be anywhere near as 
>> tight as in a modern piano.  The tensions on the strings are not as high 
>> as for a modern piano.   I trust you did your homework and analyzed the 
>> original wire and calculated out what the tensions and strains should be 
>> for A435?  You shouldn't need a pinblock support unless you feel the need 
>> to bash too-tight of pins in really hard.
>>
>> aa
>>
>>
>>
>>
>>
>> From: "Mark McConnell" <mconnell1 at instruction.com>  [ Save Address ]
>> Reply-to: Pianotech List <pianotech at ptg.org>
>> To: pianotech at ptg.org
>> Subject: pinblock support in square grand
>> Date: Sat, 22 Mar 2008 23:17:15 -0500
>>
>> I am assisting a tech in restringing a circa 1840 square grand. There 
>> doesn't seem to be any way to use a pinblock support when hammering in 
>> the new pins, since the case is built around the block. Should I assume 
>> support is not needed? Does anyone have any experience with these? Thank 
>> you.
>> Mark
>>
>>
>> --
>> Anne Beetem Acker
>> Historic Keyboard Specialist
>> http://www.pianogrands.com
>> http://www.anneackerkeyboards.com
>> 912-704-3048 mobile
>>
>>
>