bore brushes

[Thomas Cole]

James,

Changing 7mm into inches, I came up with .2756" so it may not be a real 
tight fit.

I restrung a jumpy-pin Steinway once by first reaming with a spoon bit. 
Then I used powdered chalk on the tuning pin threads. It became very 
tunable. I suppose you could also use pin driving fluid.

Tom Cole

Pianoman wrote:

> Last week I bought a 7mm brass bore brush to clean out the tuning pin 
> holes of a Steinway grand that had 3 (0) pins that are needing 
> replacing because of not being tight enough.  No, it will not be 
> getting a new pin block.  Has anyone used the 7mm ( around 0.285) bore 
> brush before and does it do a good job of cleaning the original holes 
> to help avoid pin jumping with the new pins?
> Thanks,
> James
> James Grebe   Piano Tuning & Repair   Member of M.P.T.
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