Hammer spring replacement

Newton Hunt nhunt@jagat.com
Fri, 20 Aug 1999 08:24:14 -0400


Hi CLyde,

Piano springs are made of bronze or phosphor bronze.  CHeap, durable,
easy to work.  Spring steel has to be bent the hardened with heat. 
Bronze does not.

I you call PrattWin and ask if they can make up one for you.  They are
fast and inexpensive, comparatively.

You can remove the springs and drill an additional hole for each
spring so you can double back the wire and cut it off at the front
where the cloth with cover the cut end.  THis is a time consuming job
and care must be taken to prevent distorting the coil.

Bear in mind that it is the coil that does the work, not the long arm.

You can order a set of screw on springs and drill holes for the
screws.  Before screwing them on weaken the spring a whole bunch, and
you may have to do that again when you return the rail.

Take the action out and slip the rail down between the hammers and the
dampers with the springs pointing up.  When you have it all the way
down almost to the damper springs rotate the rail so the springs go
between the hammer shanks.  When it is rotated about ninety degrees
begin the lift it up and rotate more until it is in place for
securing.  Be gentle, it is easier to bend them than to straighten
them in place.

Lots of luck.

		Newton


This PTG archive page provided courtesy of Moy Piano Service, LLC