Keyframe Bedding

[Dean May]

What a great tip! Many thanks.

I'm a little confused by the dimensions you give. You set the caliper for
.015 to .020 clearance, turn bolts up until the keys touch. Then you say
.010 is sufficient. Do you go for a range of .010 to .020? 

Dean

Dean May             cell 812.239.3359 

PianoRebuilders.com   812.235.5272 

Terre Haute IN  47802

 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Jon Page
Sent: Monday, July 07, 2008 9:48 AM
To: pianotech at ptg.org
Subject: Keyframe Bedding

Let's try something different, a piano related topic:

An easy way to set the glide bolts is with a caliper.

With the glide bolts off the keybed, measure a key
height in front of the bolt. Reset the caliper to .015"
to .020" higher and turn the bolt until the key touches
the caliper. Plus .010" at the ends is sufficient.

Apply slight upwards lift at the stack to see if the
glide bolt still knocks and tweak as needed.
This is an easy way to apply even pressure across.

Longer keys would necessitate a wider gap
measured with the caliper.
-- 

Regards,

Jon Page