Welcome to LivingPianos.com. I’m Robert Estrin. I recently received a great question from a viewer: How much does a pinblock cost? As simple as that might sound, there’s actually a lot more to it than you might expect!
What Is a Pinblock?
Let’s start at the beginning. Your piano has an enormous amount of string tension—tens of thousands of pounds! If you’ve ever tried to pluck a piano string, you know they feel rock-solid. That tension has to be held securely, and that’s where the pin block comes in.
You might assume the metal plate on your piano is what holds the tuning pins in place, but in fact, it’s the thick wooden structure underneath the cast iron plate that does the job. That piece of wood, made up of multiple laminated layers of hardwood, is what we call the pinblock.
Why It’s Not a Simple Repair
If your piano won’t hold a tuning anymore, it could be due to a cracked pin block or loose tuning pins. So, you might wonder—can’t you just replace the pin block? How much does that cost? Well, that’s where things get complicated. Pinblocks aren’t off-the-shelf items. They are custom-made for each individual piano. Replacing one means essentially entering into a piano rebuilding process. First, the piano must be disassembled. The strings and plate need to come off. Only then can the process of fitting a new pin block begin.
A Very Precise Fit
The pin block has to fit perfectly flush against the plate, and because the shape of the plate is irregular, this takes incredible precision. A rough shape is cut, and then chalk is applied to the area where the pin block meets the plate. The pin block is pressed against it, and the areas marked with chalk are carefully shaved down. This is repeated—again and again—until the pin block sits perfectly flat against the underside of the plate. Once the fit is exact, the tuning pin holes must be drilled with tolerances down to thousandths of an inch and at specific angles. This isn’t one-size-fits-all work. Every pin block replacement is its own unique challenge.
But You’re Not Done Yet. Once the new pin block is in place, the piano must be restrung—we’re talking about 220 to 240 strings. And when you do that, the damper felt often needs replacing as well. If the dampers don’t seat perfectly, you’ll end up with buzzing or other unwanted noises. That means the damper regulation has to be redone too.
Other Work That Often Comes With It
A thorough rebuild usually involves much more. Anywhere the strings touch metal, like the bridges, may need attention. Worn bridge caps and pins can cause grooves that interfere with string termination, and that can affect the tone. There’s also the capo d’astro bar in the treble range. That’s the part of the plate that bends down over the strings. Over time, it can develop grooves too, and should be smoothed out for best performance. Then you have the agraffes—the little brass guides with holes for the strings near the front of the piano. These also wear and can cause tone issues or buzzing. Smoothing or replacing them can be necessary as well.
Why Do All This?
Some rebuilders cut corners. But if you’re going to go to the effort of rebuilding a piano, why not make it as good as it can be? Done right, a rebuilt piano can sound as good or better than when it was first made, depending on the era and original craftsmanship.
So, back to the original question: how much does a pin block cost?
Just the pin block work alone might cost under $10,000. But since it requires a full rebuild, you’re realistically looking at $20,000 to $30,000 for the complete process. Some high-end rebuilds can even reach $50,000 or more, depending on the piano and the quality of the work. It’s a complex subject, and it’s easy to see how a simple question can open the door to a deep and fascinating look into piano construction. I hope you found this information enlightening!
Thanks for joining me here at LivingPianos.com, Your Online Piano Resource.