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#3103692 04/08/21 10:57 AM
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Attempting diy key leveling. Which surface is the reference surface?

I notice some tools rest on the key slip, but what if the key slip isn't completely level. In some other videos I see they've got a tool that levels to the keybed with the keyslip removed.

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EinLudov #3103707 04/08/21 11:24 AM
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need using paper shims there usually.

EinLudov #3103718 04/08/21 11:43 AM
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My confusion is, which surface is the true level surface for the piano, or does it not matter as you'd adjust the capstans, and just go by aesthetic level (accounting for evenness).

Last edited by EinLudov; 04/08/21 11:43 AM.
EinLudov #3103721 04/08/21 11:54 AM
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If you can’t use the tool that takes advantage of the key slip consider the WNG straight edge. Set #1 and # 88 at the proper height and replace punchings with a rigid device that retains the key height. Rest the straight edge on 1 and 88
It will become obvious which white keys are high or low.


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Gene Nelson #3103730 04/08/21 12:16 PM
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Originally Posted by Gene Nelson
If you can’t use the tool that takes advantage of the key slip consider the WNG straight edge. Set #1 and # 88 at the proper height and replace punchings with a rigid device that retains the key height. Rest the straight edge on 1 and 88
It will become obvious which white keys are high or low.

Set 1 and 88 relative to which surface Gene? laugh

EinLudov #3103823 04/08/21 04:02 PM
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The typical parameters for white keys are the bottom of the key is below the key slip and the top of the key has a little room to lift up before it contacts the fallboard felt and the front key pin fits nicely into the mortise and the balance rail pin is slightly above the balance rail button.
To get the height equal on both 1and88 a steel rule or tape measure should do it snd you can reference it to key slip, cheek blocks key bed ..
You may need to reposition the keystop rail.


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EinLudov #3104037 04/09/21 07:40 AM
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Is this a vertical or grand?

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P W Grey #3104070 04/09/21 09:20 AM
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Originally Posted by P W Grey
Is this a vertical or grand?

Peter Grey Piano Doctor

Grand, but I would've thought picking a reference surface would be the same on a vertical.

Last edited by EinLudov; 04/09/21 09:20 AM.
EinLudov #3104079 04/09/21 09:40 AM
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Most pianos have a specification of key height related to keybed or key height to floor. Set this height on the end keys and level the keys in between to those

EinLudov #3104193 04/09/21 02:57 PM
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Quote
Grand, but I would've thought picking a reference surface would be the same on a vertical.

Not quite. On a grand, the keybed is readily accessible with the key slip rail removed. In an upright piano the key slip rail, or "lock rail" is integral with the case of the piano and it therefore isn't easy to take measurements from the keybed.

EinLudov #3104209 04/09/21 04:13 PM
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As i think was stated above key height should be such that the fallboard is NOT interfered with, the balance rail pins should protrude a little above the mortise, the front bushing mortise should cover the front rail pin by about 1/8" +-, one should NOT be able to see the bottoms of the fronts when the keyslip is in place, nor should one be able to see front rail pins through that gap. Every piano can be slightly different, as well as having STUFF done to it previously that you don't know about. One must be able to investigate and set a course in harmony with what one encounters in good practice.

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