McGuire Piano Blog

Adam Schaaf – Regulation

May 6th, 2018

The photos which follow show new hammers installed in the action and regulation in progress.

Regulating escapement

Regulating damper timing on the workbench

Regulating damper spoons on the workbench

1905 Heine Recondition

April 20th, 2018

I do love my job, especially when it’s clear that my objectives are met. My objectives? … enabling the joy of music for my customers.

This 1905 Heine upright came to my shop as a neglected and beat up piano, but with “good bones”. For this piano, we erased years of wear with cleaning, repairs, and reconditioning.

Today, when I saw the customer fighting the tears, expressing joy in the result, and telling family stories of the music and the piano … then I know my objectives were met.

Technically this is the work performed:

  • New keytops installed (many ivories were damaged or missing)
  • New key bushings installed (giving the pianist a feeling of firmness and security when playing)
  • Cleaned, stained and polished sharps (preserving the authenticity and beauty of the original ebony)
  • Installed new dampers (the originals were worn and hard, preventing them from performing their function)
  • Reshaped shaped hammers (improving the tonal qualities of the piano)
  • CA glue treatment of pinblock (restoring the torque the tuning pins need to do their job)
  • Action repairs (just making everything work!)
  • Regulation, tuning, and voicing (the icing on the cake. Now the touch is smooth and responsive. The voice of the piano has clarity and uniformity)
  • Clean, polish, and touchup the case (the pictures tell the story)
  • Refinish keybed rub-rail (lots of door jamb damage went away)

Is it everything I want in a piano? NO. Is it everything the customer needed? Clearly, YES.

Adam Schaaf Upright Piano – Action rebuilding

November 19th, 2017
Adam Schaaf Piano bottom board is reinstalled

The reconditioned bottom board is re-installed. Pedals are buffed and new bushing cloth is installed for squeak free performance. Trapwork is reconditioned for fault free operation.

Keys have been rebushed and reinstalled on the reconditioned keyframe. This effort will help to provide the excellent touch response we seek to provide the pianist.

New treble dampers installed on Schaaf upright piano

The action brackets have been cleaned and painted for a fresh appearance. New treble dampers have been installed and regulated for uniform lift. At this point, The action rails and damper levers have been cleaned by blasting with corn cob grit. The wippen rail has not yet been re-installed. The old hammers have been removed, making damper work straight forward. This process emulates the original process order utilized in the factory 98 years ago.

New Renner piano hammers custom bored for installation

New Renner hammers have been custom bored for installation.

Restringing the Adam Schaaf Player Piano

November 19th, 2017
Piano Restringing in process

1919 Adam Schaaf upright piano restringing in process

Adam Schaaf player piano - stringing complete

Stringing is complete, and treble pressure bar is re-installed. This photo is taken from the perspective of the stringer while the piano is on its back.

Adam Schaaf Player Piano – Preparation for Restringing

October 4th, 2017

After completing work on the bottom board and keyframe, I’m preparing the piano for restringing.

Original Condition

Adam Schaaf player piano original condition of the low treble strings

Original condition of the low treble strings


Adam Schaaf Player piano: Original Condition of bass strings and tuning pins

Original Condition of bass strings and tuning pins

Preparation for Restringing

In preparation for resstringing: old strings and tuning pins have been removed, new understring cloth has been installed, tuning pin bushings have been removed, and the plate has been cleaned.

In preparation for resstringing: old strings and tuning pins have been removed, new understring cloth has been installed, tuning pin bushings have been removed, and the plate has been cleaned.
In preparation for restringing: old strings and tuning pins have been removed, new understring cloth has been installed, tuning pin bushings have been removed, the plate has been cleaned, and plate bolts have been tightened.

Additional work to be performed before restringing

  • Soundboard cracks will be shimmed
  • Separated ribs will be re-glued to the soundboard
  • New tuning pin bushings will be installed.

Adam Schaaf Player Piano — Bottom Up

October 1st, 2017

An Adam Schaaf player piano recently arrived in my shop for a complete rebuild.   I’ll be doing the piano work, and the player work will go to a player expert.   I’m pleased that my client has recognized the need for good piano work to precede good player work.   With good piano work, the player mechanism can perform at its best.

Work began with restoration of the keyframe, bottom board, and pedal trap work.



Adam Schaaf player piano keyframe before restoration

Keyframe before restoration

Adam Schaaf upright player piano keyframe after restoration

Keyframe after restoration


Bottom Board and Pedal Trapwork

Adam Schaaf upright player piano: bottom board and trapwork before restoration

Bottom board and trapwork before restoration

Adam Schaaf upright player piano: bottom board and trapwork after restoration

Bottom board and pedal trapwork after restoration

Drill Press Chip Ejection

September 1st, 2017

When boring piano hammers, keeping chips away from the jig surface is a constant need.  I was tired of clearing the debris with a hand-held air nozzle.   $36 in parts from Amazon helped me to create a nice solution.   The heart of the solution is a 12V DC solenoid that is controlled by a magnetic switch.   The magnetic switch closes when the drill press quill descends.    Like a lot of shop improvements, I didn’t get payback in the first use, but the drilling process is much more efficient when using this new fixture.

Here’s the parts list:

Old technology meets new: Installing pedals on an upright piano

August 13th, 2017

While installing pedals on a 90 year old upright piano, I had the opportunity to upgrade materials, and have a little fun at the lathe. The old pivot system employed a hardwood dowel bushing in a cast iron bracket. The system was likely a good one for the first 30 years, but with wear, it became floppy and noisy, and broken. I chose to fabricate new bushings to be used in the old brackets using UHMW (ultra high molecular weight polyethylene) rod. UHMW is ideal for this application, since it is self-lubricating. For someone who doesn’t do a lot of lathe work, it presented a bit of a creative challenge, and I’m pleased with the result. I’m sure it will be serviceable for many years, and earns a lifetime guarantee.

Trimming Damper Heads

July 23rd, 2017

I wanted to trim 4 mm from Tokiwa damper heads for better geometry in a 1927 Leonard upright. Here’s the jig I built to get the job done.

Stieff Rebuild — June 2017

July 3rd, 2017

The soundboard was tapered (diaphramized in Steinway terminology).   First contour lines were routed into the board, and then the board was sanded to the contour lines on the stroke sander.


Profile of countour lines tapers the board from 0.26″ to 0.33″

The video shows use of the stroke sander to achieve the taper by sanding to the contour lines.

Ribs were shaped to a radius of 60 feet, then glued to the soundboard using cauls and compressed air clamping pressure.    The photo below shows the last rib in the cauls.  Typically I clamped 3 or 4 at a time.

After the ribs were glued, a radius was planed onto the ribs.   This is a craftsman touch.   Few will ever crawl under the piano to inspect this detail.