Bass bearing bar

[Jon Page]

---------------------- multipart/alternative attachment
At 06:16 PM 2/22/2002 -0800, you wrote:
>I have to remake a wooden bass bearing bar for an old upright (tuning pin 
>side).  What is the correct angle that the grain should run?  Seems 
>straight forward on appearance, any comments?
>
>
>David Love

I made one from a scrap of pin block stock and stained it dark.

Since the old one was split, there was no indexing the pins from that one.
All I could gather from it was length, width and height.

With the bar removed, the old pin holes and torn wood can be filled with epoxy.
Scrape/sand this surface smooth to seat the new cap.

Once the new piece was fashioned and before the bevels are cut, place it in 
the piano,
indexing it with bridge pins.

Here's the tricky part:to locate the pins, replace the action and run a 
thread from
the bridge pin through the string cut in the hammer and mark it on the 
bearing bar.
After all the strings were marked, use a drafting divider to even things off.

First, measure the distance between the first and last single string pins 
and divide
by the number of strings (or spaces - too early to remember).  Set the 
divider to that number
and verify if it is good, if not, readjust the span on the divider and 
recheck. Once you come out
even you can index the pins.

Do the same on the double strings by measuring the distance between the 
left strings of the ends.
Map out the left string order, then average the distance for the right 
string and index them off
the divided left strings.  Whew.

Remove the counter bearing bar and drill the holes on a drill press but do 
not go all the way through.
When you epoxy it on, you don't want epoxy oozing up into the holes. Bevel 
the cap now.

Install the bar indexing it with the bridge pins. I used my sound board 
press to apply pressure.
Once set, drill the holes deeper for the pins. The lower singles should be 
a shallow angle unless you
have the side of the case off. Stain, a few coats of shellac, install pins. 
Replace strings.

Hope this helps,


Regards,

Jon Page,   piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@attbi.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/12/47/3a/3d/attachment.htm

---------------------- multipart/alternative attachment--