PianoTech Archive

  • 1.  Baldwin SD-10 Treble Counterbearing

    Registered Piano Technician
    Posted 07-27-2006 21:18 
    From "David Love" <davidlovepianos@comcast.net>

Has anyone ever modified the Baldwin SD-10 modified counterbearing set up
with that fancy looking kazoo?  It looks as though the counterbearing
segment is a bit long for the angle of inclination yet changing it seems,
well... any ideas, experience (especially with good results).  

Thanks

David Love
davidlovepianos@comcast.net 
www.davidlovepianos.com


  • 2.  Baldwin SD-10 Treble Counterbearing

    Posted 07-27-2006 23:25
      |   view attached 
    From Overs Pianos <sec@overspianos.com.au>

Hi David,

>Has anyone ever modified the Baldwin SD-10 modified counterbearing set up
>with that fancy looking kazoo?

We've reshaped the bars with an angle grinder, followed by a die 
grinder etc., to achieve a smaller radius.

>   It looks as though the counterbearing
>segment is a bit long for the angle of inclination yet changing it seems,
>well... any ideas, experience (especially with good results).

I agree its too long, but we decided to leave it with just a reshape. 
We re-plated it with electroless nickel.



The modification was quite successful.

Best regards,
Ron O.
-- 
OVERS PIANOS - SYDNEY
    Grand Piano Manufacturers
_______________________

Web http://overspianos.com.au
mailto:ron@overspianos.com.au
_______________________


  • 3.  Baldwin SD-10 Treble Counterbearing

    Registered Piano Technician
    Posted 07-28-2006 07:37
      |   view attached 
    From "David Love" <davidlovepianos@comcast.net>

Thanks, just what I was looking for.  Did you at all consider shimming up
the back end under where the screws are to increase the angle slightly? 

 

David Love
davidlovepianos@comcast.net
www.davidlovepianos.com 


    
                                                
    
					
                                                    

                
    
                    
    
                        
                        
                    
    
                
    
        
                                                
				
    
                                                
    
                                                    
                                                        
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  • 4.  Baldwin SD-10 Treble Counterbearing

    Posted 07-28-2006 08:15 
    From Overs Pianos <sec@overspianos.com.au>

>Thanks, just what I was looking for.  Did you at all consider 
>shimming up the back end under where the screws are to increase the 
>angle slightly?

No, I thought the approach angle was steep enough. What do you think?

Ron O.

>
>David Love
>davidlovepianos@comcast.net
>www.davidlovepianos.com


-- 
OVERS PIANOS - SYDNEY
    Grand Piano Manufacturers
_______________________

Web http://overspianos.com.au
mailto:ron@overspianos.com.au
_______________________


  • 5.  Baldwin SD-10 Treble Counterbearing

    Posted 07-28-2006 10:08 
    From Horace Greeley <hgreeley@stanford.edu>

At 07:14 AM 7/28/2006, you wrote:
>>Thanks, just what I was looking for.  Did you at all consider 
>>shimming up the back end under where the screws are to increase the 
>>angle slightly?
>
>No, I thought the approach angle was steep enough. What do you think?

I've generally found that shimming the back of the plate introduces 
more problems than it may solve...increased buzz and tuning stability 
issues being the main culprits.

Ron, I really like the new radius you put on the bearing.  That 
should clean things up a good deal.  Also the plating was different 
between the earlier and later versions.  I suspect that your 
electroless nickel is the ticket.

Best.

Horace


  • 6.  Baldwin SD-10 Treble Counterbearing

    Registered Piano Technician
    Posted 07-28-2006 10:19 
    From "David Love" <davidlovepianos@comcast.net>

Changing the angle without changing the radius might very well be
counterproductive.  I'm not sure why it would introduce tuning instability.
While I didn't measure the angle, it appeared to be a bit shallow for the
given length.  But if correcting the radius by itself was successful, I have
no problem with limiting the alteration to that.  

 

David Love
davidlovepianos@comcast.net
www.davidlovepianos.com 


    
                                                
    
					
                                                    

        
                                                
				
    
                                                
    
                                                    
                                                        
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  • 7.  Baldwin SD-10 Treble Counterbearing

    Posted 07-28-2006 12:17
      |   view attached 
    From "Delwin D Fandrich" <fandrich@pianobuilders.com>

Ron O's approach works well with the single-piece unit. If you encounter an
SD-10 (or SF-10) with the individual termination pieces, let me know.
 
Del


  _____  

From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of
David Love
Sent: July 28, 2006 6:37 AM
To: 'Pianotech List'
Subject: RE: Baldwin SD-10 Treble Counterbearing



Thanks, just what I was looking for.  Did you at all consider shimming up the
back end under where the screws are to increase the angle slightly? 

 

David Love
davidlovepianos@comcast.net
www.davidlovepianos.com 


    
                                                
    
					
                                                    

                
    
                    
    
                        
                        
                    
    
                
    
        
                                                
				
    
                                                
    
                                                    
                                                        
                                                        Original Message