[pianotech] pinblock Question

[Ron Nossaman]

Gene Nelson wrote:
> Hi John,
> For the screws I have learned to use this technique that works ok - it 
> is a two step process and I like it better than a tapered bit for the 
> big pin block screws.
> Measure the shank (may be the wrong terminology - sorry)of the screw and 
> add 10% and that is the drill size for the threaded part. Flag the drill 
> for depth and dirll the hole. For the shoulder, use the same drill size 
> as the shoulder, flag the drill and redrill the hole to the depth of the 
> shoulder.
> Add just a dab of Teflon powder to make it easier to 
>  cut the threads.
> Gene

I've also found that either running a lag screw (long, with 
the head cut off, in an electric drill) with a similar thread 
in as a tap, or just forcing the sucker in cold with an impact 
driver, works pretty well too.

Depends on where you stand and how you squint.
Ron N