Sleeves on the balance rail pins were common to these pianos though I don't recall the green color, what I recall was plain translucent 'clear' or milky color. I assumed it was just polypropylene, not teflon, but that is a guess. Considering the space they take up, one realizes the sleeves were by design as the pins have to be correspondingly narrow to fit in the keys. The keys on the consoles are weighted at the rear of the keys, near or behind the capstans.
Knight also used a thin, phenolic resin impregnated material as plate bushings for the tuning pins. He had lots of ideas.
edit: AI seems pretty confident that the sleeves are nylon as bright green was a color coded nylon material manufactured in England and Europe.
------------------------------
Steven Rosenthal RPT
Honolulu HI
(808) 521-7129
------------------------------
Original Message:
Sent: 01-12-2026 13:19
From: James Kelly
Subject: Knight piano key pins: Teflon?
it might be heat shrink tubing the only teflon keypins I know of are from WN&G
------------------------------
James Kelly
Owner- Fur Elise Piano Service
Pawleys Island SC
(843) 325-4357
Original Message:
Sent: 01-12-2026 10:26
From: Scott Cole
Subject: Knight piano key pins: Teflon?
Greetings all,
Recently, I tuned a 1965 Knight vertical piano. The key pins had been wrapped with some kind of green material. I was just curious if anyone had seen this before?
I was thinking maybe Teflon? I know Knight had some quirky designs.
------------------------------
Scott Cole, RPT
rvpianotuner.com
Talent, OR
(541-601-9033
------------------------------