[pianotech] Size of Pinblock Drill bit?

[Ron Nossaman]

On 3/6/2013 1:57 PM, Noah Frere wrote:
> I searched my not inconsiderable archives for an answer, but have come
> up empty-handed. I am using 1/0 Denro blued tuning pins in a new
> multi-lam Maple pinblock, and need to order the drill bit. I'd like to
> double-drill - makes sense. The Pianotek catalog recommends, in effect,
> a drill bit .016" to .021" under the diameter of a 2/0 pin in a
> multi-lam pinblock. Following that logic, I could use the .250" on the
> first pass, and the .261" (.015" under) or .257" (.019" under) drill bit
> on the second pass. Also, I like the idea of the brad-points, but also
> like the idea of the other ones, which are "slow spiral."  Any
> recommendations?

You can't use brad points on the second pass anyway, so decide if they 
will get you anything desirable on the first and buy accordingly. Slow 
spiral, definitely, particularly on the second pass. The 0.250" should 
be fine for the first pass. As to final size, as Greg said, test - etc.

Why 1/0?

Ron N