[pianotech] spanner wrench?

[Ron Nossaman]

On 2/6/2011 9:30 AM, jimialeggio wrote:

Jim,
Grind a concave curve on the face of the thing, so the contour fits (or 
clears) the curve of the nut. This will put the pins in the hole with no 
gap between the nut and the tool. The pins can be almost anything from 
moderately hard steel to set screws to roll pins. You didn't shear the 
pins, they bent and broke. Get the tool in contact with the nut so 
there's no free pin, and they won't.

Another goodie is an impact tool. A handle with one correct size pin in 
it, placed in one of the holes and tapped (or whacked) in the right 
direction with a hammer, will loosen it.

Ron N