key trimming bit

[Fenton Murray]

Dean,
Try 2 passes, your last pass being a micro pass, new, sharp bit, different rpm and speed rates.
Fenton
  ----- Original Message ----- 
  From: Farrell 
  To: Pianotech List 
  Sent: Friday, March 14, 2008 8:31 AM
  Subject: Re: key trimming bit


  Dean, I don't know a darn thing about trimming keytops, but I have used spiral router bits a fair bit. If the router is above the keytop, shouldn't you be using a down-cutting spiral bit to minimize breakout? A downcutting bit should leave a smooth cut on the top (router side) surface at the potential sacrifice of the lower surface (although if there is wood bonded to the underside of the keytop, I should think that there will be no breakout on the underside of the keytop).

  Terry Farrell
    ----- Original Message ----- 
     
    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 May 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080314/095dc3e6/attachment.html