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Joined: Nov 2011
Posts: 25
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I'm installing a new set of hammers on an old piano (hammers not ordered yet).
It's my first piano renovation.
The piano's hammer rail is curved inwards towards the told notes, and the old hammers were made correspondingly shorter, to get the blow distance correct.
Do new sets of hammers allow for this?
I know I can get the old hammers re-felted, but that would be more expensive.
Has anyone come across this, and what are the best solution?
They never seem to tell you about this sort of thing in piano repair books!
I would be really appreciative of any help with this matter.
Thanks - Chris
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Joined: Feb 2009
Posts: 1,764
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What is the piano's brand? Is it a spinet, old upright, grand? (Some old grands do have a moving hammer rail rather than an, una corda pedal.) Is this a square grand?
Is the curvature due to warpage? Or, was it manufactured that way?
Do you have a picture?
Edit: Don't be afraid to consult with the piano hammer manufacturer or vendor as well as here.
Edit: For custom hammers, you likely will be sending samples.
Last edited by daniokeeper; 10/29/17 08:55 PM.
Joe Gumbosky Piano Tuning & Repair www.morethanpianos.com (semi-retired) "The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane." -Marcus Aurelius
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Joined: Nov 2011
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The piano is a standard upright. It is a Wertheim, a make which has a high reputation in Australia. I don't think the curve was due to warpage - it was made like that, and the top section hammers shorten accordingly, so that the bold distance remains constant. I've also noticed ta the main action rail doesn't sit straight, but slightly diagonally, slanting onwards from bottom to top. I'm aware that the simplest procedure would be to have the hammers re-felted, but that's going to be about another 60-70 euros more. I'm thinking my best option might be to speak to another technician here in Australia.
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Joined: Jan 2011
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I have tuned many old Wertheims but never noticed what you are describing. Can you please post a photo, or at least a link to photos.
It is not usual to have hammers recovered for this type if work. A standard set of hammers of the right size should work. If you send the end hammers from each section to the supplier then they should be able to bore them, or shank them as well, based on the dimensions of the existing.
Where are you located?
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Joined: Sep 2004
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It is possible to straighten a warped wood hammer rail. Remove, clamp straight and gently heat it so the entire piece of wood is heated completely. Let it stay clamped for a while. Dont get it too hot. If it works it is a better alternative to custom hammers and custom regulation.
x-rpt retired ptg member
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