[pianotech] Rubbing hammers

[Avery Todd]

One addition to other's posts. Don't forget to check the travelling first.
That could cause the rubbing also.

Avery

On Sat, Jan 29, 2011 at 12:03 AM, David Love <davidlovepianos at comcast.net>wrote:

> During the hanging of the hammers they were not rotated enough clockwise.
>  You will need to either heat the shanks and rotate them (easier) or rehang
> them (harder).  However, when you do that the tails will rub, or the left
> side of the tail of the hammer moving forward will rub against its neighbor
> to the left.  Often bass hammers are tapered on one side of the tail (on the
> bass or left side) to prevent this from happening.  These weren't.  First
> you need to see whether the hammers are striking the strings in the center
> of the hammer.  If they are striking on the right side of the hammer or if
> the flanges are rotated to the right in order to get them to strike the
> strings on center, then you will need to rotate the hammers clockwise either
> by burning in or rehanging.  If the hammers are then striking the strings
> too much on the left side of the hammer you will have to respace or change
> the y axis of the flange slightly.  If that causes the left side of the tail
> to rub on the hammer to its left as it rotates forward then you will need to
> trim the tail of the hammer on just the one side.  The easiest way to do
> that is to clamp a smoothing plane (low angle) upside down into a bench vise
> and remove each hammer in the section and plane off a bit of the tail by
> hand.  Aren't tools wonderful.  Or, in view of our recent discussion on
> doing things without modern tools you can chew the left side off with your
> teeth.
>
> At least that's my take on it but given the late hour and the adult
> beverages consumed you should explore the possibility further before you
> take my word for it.
>
> David Love
> www.davidlovepianos.com
>
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
> Behalf Of limhseng at gmail.com
> Sent: Friday, January 28, 2011 8:45 PM
> To: pianotech at ptg.org
> Subject: [pianotech] Rubbing hammers
>
> Hi,
> This is a beautiful C. Walter upright . My questions are-1.how did it
> happen?. 2. Is there a correct way of respacing the hammers other than
> filing the sides of the offending hammers?
> Thanks!
>
> Sent from my BlackBerry Wireless Handheld Powered by Gee! from StarHub
>
>
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