Foreign objects can also get lodged in those parts as well. The aforementioned blockages speak to the piano key sticks (the black and white keys) but what about inside the piano? The complex system of levers inside the piano known as the whippen assembly can also have blockages. Unfortunately, they didn’t have the same sense of humor. When asked recently about what to do when someone’s kid dropped something inside the piano, I said the solution is easy… “get different kids”, I replied. The theme here is that all of these objects are thin but get hung up in between the keys. Common foreign objects include coins, guitar picks, paper clips (usually from sheet music), eraser shavings (usually from composers or students writing music at the piano and scribbling out changes), kid’s toys, playing cards and rubber bands.
Piano actions are made up of over 4,000 parts and you would not believe the things that get stuck in between piano parts to make a piano key misfire. This is the first go-to when diagnosing sticking keys. So let’s look at each of these areas briefly. The rare exceptions to this come from broken parts but they account for a very minor percentage of sticking keys. That friction shows up in four forms: blockages, wood swelling, joint corrosion, or rubbing.
The vast majority of the problems with a sticky piano key come from unwanted friction. It can happen on new pianos and old pianos alike and today we’re going to examine the main reason why piano keys stick.
“Can you fix a sticking key?” The term ‘sticking key’ refers to a mechanical failure where a piano key is depressed and it doesn’t return to its normal position in a timely manner. Aside from tuning the piano, there’s one question that gets asked more than any other.
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