The thumb key is a notorious trouble spot due to the short length of the mechanism tubing involved and the action of the player’s thumb at a  right angle to the key’s axis of rotation. Nagahara has developed a more durable, stable mechanism, the Nagahara Thumb key (US Patent #5,708,226). The secret to this new assembly is the double-sleeve configuration assuring stability and strength combined with an ergonomic shape designed to improve comfort. This revolutionary key design is standard in all of our instruments.












Bellow is a drawing of  the special double-sleeve design. This simple but meaningful improvement to the flute’s mechanism is sure to make a difference in fast passages and legato movements with added comfort, better hand position for consistent balance, and extended stability after years of playing.


US Patent #5,708,226


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Thumb Key