Balance pin holes

Richard Brekne richardb@c2i.net
Thu, 24 Feb 2000 10:33:04 +0100


Thanks Roger

nice complete posting for my collection. What a guy... grin. I wonder if you could
get into this about the balance pin hole a bit more tho. Leave the key bushings
out of the discussion for the moment. The hole is like supposed to be just about
the same size as the pin from the bottom of the key upwards inside the key... just
how far ?? what happens if this distance is too small / to large. How do you
change this distance (grin and at the same time improve the situation..) ??

Also I seem to remember Laroy Edwards describing the Yamaha tool as you do,, but
then he also had some adjustment he made with this from the bottom of the key...
Cant remember what he said.. anybody ??



Roger Jolly wrote:

> Hi Richard,
>                 A couple of suggestions.
>
> Easing should always be done from the top of the key with a Yamaha style
> bushing hole reamer.
> The easing should be be done by rotating the tool with little or no
> downward pressure. A little at a time
> is the key, ( no pun intended <g>) the key should just slowly slide down
> the pin.
> Before reaming check the balance rail bushing to make sure this is not
> causing the problem. 0.002" is the desired clearance for balance rail
> bushings......
>

--
Richard Brekne
Associate PTG, N.P.T.F.
Bergen, Norway




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