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Steinway, stripped hammer rail #2850707
05/21/19 11:06 AM
05/21/19 11:06 AM
Joined: Jan 2019
Posts: 217
PA
J
jsilva Offline OP
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jsilva  Offline OP
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This Steinway D I’ve been working has a number of issues. I’ve addressed many of them but one that I discovered yesterday was really discouraging.

Several of the screw holes on the hammer rail are stripped.

Does anyone know a fix for this outside of replacing the entire action frame?

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Re: Steinway, stripped hammer rail [Re: jsilva] #2850710
05/21/19 11:16 AM
05/21/19 11:16 AM
Joined: Jun 2003
Posts: 27,612
Oakland
B
BDB Offline
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Oakland
Glue some thick paper, like strips of business cards, around the diameter of the holes.


Semipro Tech
Re: Steinway, stripped hammer rail [Re: jsilva] #2850715
05/21/19 11:27 AM
05/21/19 11:27 AM
Joined: Dec 2012
Posts: 5,241
Seattle, WA USA
E
Ed McMorrow, RPT Offline
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Ed McMorrow, RPT  Offline
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E

Joined: Dec 2012
Posts: 5,241
Seattle, WA USA
The most permanent repair outside of replacing the rail I have found involves rebuilding the thread using West Systems epoxy.

You must unscrew the flanges from the rail. Remove the cloth, (I hate that stick-on-stuff felt NY uses and find the action works better without it). Wax the flange screws. Clean any greasy contaminants out of the damaged hole. Place neighboring screws in place to use as alignment guides. (Don't run them into the bottom of the hole and strip out the thread). Mix up the epoxy. Dribble some in the damaged hole. Place the screw in the hole and clean up squeezed out glue as you bring the screw slightly below the level it will go when holding the flange. Keep the screw in line with the neighbors. Let it cure overnight.


In a seemingly infinite universe-infinite human creativity is-seemingly possible.
According to NASA, 93% of the earth like planets possible in the known universe have yet to be formed.
Contact: Ed@LightHammerpiano.com
Re: Steinway, stripped hammer rail [Re: jsilva] #2850756
05/21/19 01:30 PM
05/21/19 01:30 PM
Joined: Jan 2019
Posts: 217
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jsilva Offline OP
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jsilva  Offline OP
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Thanks for the tips! I appreciate it.

Re: Steinway, stripped hammer rail [Re: jsilva] #2850773
05/21/19 02:30 PM
05/21/19 02:30 PM
Joined: Feb 2017
Posts: 2,423
New Hampshire
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P W Grey Offline
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P W Grey  Offline
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Joined: Feb 2017
Posts: 2,423
New Hampshire
While Ed's repair is permanent, it takes time to cure. If you need a quicker solution, use the same procedure but use Lake One Wood rebuilder from Allied Piano. Done in minutes and as strong as can be. Also great for large stripped screws in underside. Learn it's properties and it will be your friend (despite its toxic odor).

Pwg


Peter W. Grey, RPT
New Hampshire Seacoast
www.seacoastpianodoctor.com
pianodoctor57@gmail.com
https://www.youtube.com/watch?v=PK0T7_I_nV8
Re: Steinway, stripped hammer rail [Re: P W Grey] #2850992
05/22/19 06:45 AM
05/22/19 06:45 AM
Joined: Jan 2007
Posts: 212
NH/US
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nhpianos Offline
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NH/US
+1 on the Lakeone. It reeks like Bondo on steroids but can be mixed thin enough to easily fill screw holes or thick enough to allow filling from below. I once used it to "rebuild" the underside of a keybed where someone had literally torn out the lyre, without having to tip the piano on it's side. I would definitely avoid using it in a customer's home, however. Just opening the can briefly will leave a strong odor.

In your case however, if there are more than one or two stripped hole the whole rail should be considered suspect and probably replaced before doing any serious work on such a shaky foundation.

Last edited by nhpianos; 05/22/19 06:46 AM.

Mark Dierauf, RPT
NH Pianos
Piano technician & rebuilder since 1978
www.nhpianos.com
Re: Steinway, stripped hammer rail [Re: jsilva] #2851021
05/22/19 08:41 AM
05/22/19 08:41 AM
Joined: Jan 2019
Posts: 217
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jsilva Offline OP
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jsilva  Offline OP
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Joined: Jan 2019
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PA
So the wood rebuilder works well with Steinway’s metal rail?

Last edited by jsilva; 05/22/19 08:41 AM.
Re: Steinway, stripped hammer rail [Re: jsilva] #2851076
05/22/19 10:58 AM
05/22/19 10:58 AM
Joined: Feb 2017
Posts: 2,423
New Hampshire
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P W Grey Offline
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P W Grey  Offline
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Joined: Feb 2017
Posts: 2,423
New Hampshire
Mark,

"Bondo on steroids"...YES!...funny I just used that same description for someone else.

Yes, this will work on the rail. But like everything else in this business there is a learning curve. I suggest that you play with it first and learn it's idiosyncrasies...then use it where it counts. Just don't try to fill the hole and then re-drill it. It is too tough for that and you might split the rail. Use Eds technique (or for now just use the epoxy as he siggests).

Pwg


Peter W. Grey, RPT
New Hampshire Seacoast
www.seacoastpianodoctor.com
pianodoctor57@gmail.com
https://www.youtube.com/watch?v=PK0T7_I_nV8
Re: Steinway, stripped hammer rail [Re: jsilva] #2851097
05/22/19 11:40 AM
05/22/19 11:40 AM
Joined: Jan 2019
Posts: 217
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J
jsilva Offline OP
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jsilva  Offline OP
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Joined: Jan 2019
Posts: 217
PA
Thanks! I can get the flanges on well enough that they’re not flopping around, so it can wait until I have some time to try out the products.


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