The photographs in this gallery document an action overhaul that I completed on a Canadian-built Heintzman bourdoir grand at Brandon University in 2011.
New, one piece key tops, hand notched and filed for best finish. Material has been buffed out to achieve less of a "plastic" feel.
Wood keys individually cleaned and numbered for easy identification. Capstans polished and lubricated for low friction.
Leather key bushings installed for added durability vs. cloth bushings.
Keys were widened with veneer to correct excessive gaps before new key tops were installed.
Brand new Tokiwa knuckles were installed on original shanks. They were lubricated with TFL-50 and Teflon powder for low friction. Shank centers were repined to close friction tolerances, and screws were polished to like-new look.
New felt was installed on original wippens.
High-end Crescendo felt punchings for consistent key dip. Key pins were polished and lubricated for low friction.
Neat hammer glue joint.
Leather was used for added durability.
New Tokiwa back checks.
Action finely regulated for optimal performance.
Ronsen hammers, made with felt from the Bacon Felt Company, were installed due to their resilient tone. In a market flooded with harsh-sounding instruments, this is a welcomed change!
Touch-weight chart before work was initiated. Very uneven and heavy.
Revised touch weight chart after keyboard re-balancing. Much smoother and lighter.