My guess is that the original idea was to drill the hole to the minimum 
size and let the taper on the pin widen it, thus ensuring greaster 
fiction.  May I had that many drill bits actually drill somewhat 
oversize, especially in wood, as they tend to "wander".

Tom Roach
Waterloo
Ontario
519 746 5324

On 2016-10-30 08:41, Rob Brooke wrote:
> Martin. thanks for elucidating. I had envisioned tuning pins with a 
> long taper in a tapered hole - the same principle as the pegs on a 
> violin. The notion of a partial taper of only 4 mm in a cylindrical 
> hole had never occurred to my engineer's mind. I guess the taper was 
> Zuckermann's way of making introduction of a pin into its hole easy 
> for the builder.
>
> I don't much like the notion of historical pins anyway. As a builder, 
> tuner and maintainer, they seem to have more disadvantages than 
> advantages. Anything for historic accuracy, I suppose.
>
> Rob
>


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