Pinblock Drilling Centering

[Roger Jolly]

Hi Terry,
                Take a drill bit that just fits thro' the plate holes, One 
pull of the trigger to centre mark the hole, gives a perfect centre, that 
will not allow the drill bit to wander.  Then I drill with a 1/4" drill, 
then ream out with the correct sized bit.
Regards Roger


At 10:38 PM 10/22/02 -0400, you wrote:
>Ron N's recent post on the bad rebuild reminded me to ask the following. 
>When drilling tuning pin holes in new block in a full plate with no plate 
>bushings, how best to center pin? I see so many that have the pins riding 
>on the plate, just as many were on my one of my current projects. Would it 
>not be best to just kiss the forward side (closest to pianist) of the 
>plate hole with the drill bit (it will be going in on a bit of an angle, 
>of course). That way when strings are brought up to tension, the pin will 
>move slightly (yes?) off the plate edge, and end up somewhere near the 
>middle of the hole (yes?). I have never done one of these before, but I 
>fear that if you drill the hole in the middle of the plate hole you will 
>end up with the tuning pin riding the plate on the rear side of the hole.
>
>Terry Farrell
>
>
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