[pianotech] Sluggish key diagnosis

[Michael Staples]

I'm rebushing the keys of a Baldwin Hamilton studio and would like to get
the list's help with this:

Starting with the first 10 keys as a group, I steamed out the old bushings
(using a pressure cooker without a jiggler on top), used Spurlock's .146 in
mortise sizing cauls overnight and rebushed with 1.20 mm bushing cloth and
hide glue, placing the cloth 3/16" into the mortises.  The steaming seemed
to swell the balance rail holes and my bushings seemed tight when I placed
the keys back in the piano.

Can you tell me what indicates a sluggish key to you and what steps do you
take to isolate where the problem is (front rail pin bushing, balance rail
pin bushing, balance rail pin hole, etc)

Thank you,

Michael Staples
PTG Associate Member
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