Knabe Grand Leg Plates

[John Ross]

Take the bolts out, one at a time. Cut a v groove in the thread, and taper the start. You might be lucky, and it will rethread.
When you have the bolt out, take it to an automotive supply store and they may be able to match a tap.
Another thought, if you have a good working relationship, with your mechanic, he may lend you the tap you need.
Use the bench and telephone book under the piano, as a safety feature. But if you don't move it, it should stay put, without the bolt.

John M. Ross
Windsor, Nova Scotia, Canada.
jrpiano at win.eastlink.ca
  ----- Original Message ----- 
  From: Bill Costanzo 
  To: pianotech at ptg.org 
  Sent: Thursday, August 24, 2006 10:33 AM
  Subject: Knabe Grand Leg Plates


  Hi List

   

  I have a customer who just had her new Knabe grand moved and it looks like the movers cross threaded the bolts that tighten the leg plates together (2 legs are screwed up) .and now the bolts will not start.   

   

  I wanted to try retapping the plate but I need to know what the thread size is.  A 7/16 - 20 Die goes on the bolt pretty nicely but that size tap doesn't seem quite right and I'm guessing that they're metric anyways... and I have no metric Taps or Dies. 

   

  Pianotek has a new set of 3 plates with bolts and screws for about $100 but I'd like to try to save these.  

   

  Any suggestions greatly appreciated.

   

  Thanks, Bill Costanzo

   



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