Metric Center Pin Sizes

[Isaac OLEG]

Hi Ron,

You use a "pinning plank", or a support, that is a tight thin vertical
wooden planck, with a small saw line at the top, and that is firmly
hold on your bench (the "deluxe model" include a small brass or
aluminum square to reinforce the saw line place).

Then with flat pliers you get the (very) thin end of the long rod
passing thru the flange and Birdseye, and you pull the whole thing
straight all along, burnishing the bushing at this moment. Then you
cut the center (on the 2 sides of the flange).

The main advantage of the method is the consistency obtained , and
speed (another one is the price of the parts which is far less than
cut center). The hotness generated is good for the cloth. One have to
clean the center pin with some alcohol from time to time.

I use not the center pin as a reamer, only as a burnisher, as if you
make a reamer with a rod with if you go one side up, a little bit too
much for me, I prefer separate reamers, but without handles, so to
work the fiber in one and same direction as the initial pin insertion
(that is easily noticed looking at the end of the old center pin.

Using that one direction method and burnisher is said to reorient the
fiber for a better consistency.

I've seen colleagues using the long center pin with a small segment
treated as a reamer, but I don't like the idea to ream the wood indeed
so I use it as a separate tool.

Best regards.

Isaac OLEG


-----Message d'origine-----
De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la
part de Ron Nossaman
Envoye : vendredi 6 aout 2004 17:39
A : Pianotech
Objet : Re: Metric Center Pin Sizes



>The rods ARE the center pins. The one end is filed rough and serves
as the
>broach, the next section of rod/pin is used to burnish the bushing,
then
>the flange is assembled with the shank (or whatever) on the long rod
and
>the rod is then cut flush with the outside of the flange. He does not
use
>the little ready-made 3/4" long center pins that the supply houses
sell.

Terry,
'Splain this to me please. I'm having a hard time picturing it. How
does
this work when assembling shanks and flanges? If you have one end of
the
long pin flat from the last cut and one end rough for the broach, what
goes
through the birdseye, and how do you generate the oomph to push the
pin in?


>The long length of the rod make for a very efficient burnishing tool.

The length, and presumably the efficiency of which diminishes with
every
flange pinned. How does that work?

Ron N

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