All,
This method does require a bit of practice to be able to do it without causing damage. I'll repeat does require practice.
It also requires using tools that give as much as control as possible. The drill i am using is a variable speed drill that allows me to turn the bit very very slowly with control. I have several mill bits, and i choose the one that works the best for that particular keyboard bushing. Usually it's a bit which is about .005" smaller than the mortise.
There's a feel to it. You can feel the felt being removed and/or when wood is being removed. But as i demonstrated, its possible to develop speed, and not damage the wood.
On the heated cauls. I made several thicknesses of brass cauls on my end mill. I use them on an adjustable heated iron. I select the size and temperature that cleans out the remaining glue, felt, and leaves a nice squared up mortise. From there it's just math to determine the size of bushing cloth that leaves the mortise the right size to receive the front pins. I'm not trying to burn or alter the wood, but the mortises are not always the same size.
I can easily imagine that possibly some kind of guide could be made that sits on top of the key if one wishes to do so.
When i do my next key rebushing job i'll take some before and after pics and post them.
THX
-chris
#caveman
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45 2020
chernobieffpiano.com
865-986-7720
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Original Message:
Sent: 06-08-2018 07:33
From: John Formsma
Subject: Keybushing Cloth Removal Quick and Easy
Is any wood removed this way? I thought I saw some sawdust, but it is hard to see in the video.
This might be something to try on those keys that have that white, incredibly sticky, gummy glue that nothing seems to unstick. Otherwise, I would prefer to do it the traditional way to avoid risk of damage.
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John Formsma, RPT
New Albany MS
Original Message:
Sent: 06-06-2018 12:40
From: Chris Chernobieff
Subject: Keybushing Cloth Removal Quick and Easy
Hi All,
Here's a method I've been using for removing keybushing cloth out of piano keys quick and easy.
I use a 7/32" mill bit . It takes a little bit of practice, but controlling the drill speed and by developing a "feel" you can remove the felt without damaging to the hole. I can remove all the felts (front rail felt and balance rail felt) between 3 -5 minutes with this method.
-chris
#caveman
Keybushing removal quick and easy
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45 2020
chernobieffpiano.com
865-986-7720
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