Dean, I had the same problem which I finally solved by heating the keytops before I notch them. I came to believe that the keytops are too brittle. I put the keys under a lamp with my Dampp Chaser digital temperature and humidity gauge laying on top of them. When they are about 80 degrees I start notching, and I move the key past the router bit VERY slowly. Using this method I have had absolutely no chipping. David Weiss From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Dean May Sent: Friday, March 14, 2008 11:07 AM To: 'Pianotech List' Subject: key trimming bit Hi all I am using a Spurlock style set up to trim my keytops and am having trouble with the plastic chipping out on the notch cutting station. I am using a 1/2 inch spiral carbide up cut bit from McMaster Carr (27395A31). Is there a better router bit I can be using here? Dean Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080315/fbc881a5/attachment.html
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