[pianotech] Plate screw problem ?..solution

[David Renaud]

Hello

   Thanks for all the input......

    The solution was to drill up from the bottom around the screw and pop it out.
Plug with hard rock mapleand start over with a good screw in a correctly sized hole.

All the junk is gone, new wood, new screw, clean.


     For anyone that did not see the thread

Broken plate screw deep in tall pilot hole through plate strut.
Can get easy out in there.
Cheap titanium bit shredded.....don't go there again.
Cobalt tipped bit burned out.
Black oxide bit worked until it snapped in the hole part way through.
Nothing is drilling that out that is readily available.

Screw was just shy of the shelf.........
Start with small hole saw, then drill material out from around screw with 90degree chuck, 
Drilled material out right up the the plate, popped out the mess......plug and start over clean.

                                                      Thank You
                                                       David Renaud




Sent from my iPad

On 2011-07-15, at 1:25 PM, Ron Nossaman <rnossaman at cox.net> wrote:

> On 7/15/2011 11:28 AM, David Renaud wrote:
>> 
>> Ron said.....
>> 
>>> Or you can cut out the inner rim underneath the block and attack it from the bottom.
>> 
>> Nice, yes, of course......
>> This plate screw is located just shy of the shelf....and far enough from any tuning pin holes I could actually drill up from the bottom.
>> Flexible shaft........drill up.....plug/fill, start over from the top.
> 
> Sounds like an excellent plan. If you can get in there with a deep, say 3/4" hole saw without a pilot bit, you can straddle all the broken hardware and get out a clean full depth plug.
> 
> Ron N