[CAUT] WNG F/R pin shims

[David Ilvedson]

So how have the WN&G fronts pins worked out?   Less wear on the bushing cloth...that you can tell?   I'm interesting in trying the capstans for the friction help...

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "Fred Sturm" <fssturm at unm.edu>
To: caut at ptg.org
Received: 2/7/2010 8:33:27 AM
Subject: Re: [CAUT] WNG F/R pin shims


>Hi Jon,
>	Yes, there is certainly the potential to introduce some misalignment  
>in the process of enlarging the original hole, and then drilling out  
>the nylon (or whatever it is) insert. Extra care is indicated. I  
>didn't find the changes too bad in the set I did last summer - I'm not  
>sure it was any worse than the original. It is never quite perfect,  
>hence the standard bending of pins a wee bit for spacing. Which is  
>fine as long as it is truly a "wee" bit.
>	WNG's problem is that there are any number of sizes of shank on front  
>pins in existing pianos. It isn't cost effective to make pins all  
>those sizes. I guess one could come up with a gradation of shim  
>thicknesses, but that is probably easier to say than do ($$$).
>	I think I remember correctly that I decided the drill size they  
>recommended for drilling out the shim was considerably too small. I  
>went up at least a few wire gauge sizes to get a size that would allow  
>a tight press fit without making it nearly impossible to get the  
>darned pin in.
>Regards,
>Fred Sturm
>University of New Mexico
>fssturm at unm.edu

>On Feb 7, 2010, at 8:59 AM, Jon Page wrote:

>> I ordered a set of f/r pins for a high use grand. They sent these  
>> rather
>> large plastic tubes to retrofit the new pins. It seems to me that  
>> having
>> to ream the frame hole .040" and then ream the tube hole .020" would
>> leave some room for slight misalignment.
>>
>> I'm surprised that shim is the best they can do as a supplier. It  
>> seems
>> to me that something a simple .012" plastic sheeting would be an
>> adequate shim material, or even paper (since the glue would solidify  
>> it).
>>
>> I searched the archives but nothing came up but this topic was  
>> discussed
>> a while ago.
>> -- 
>>
>> Regards,
>>
>> Jon Page