How much tuning pin in pinblock?

[Farrell]

How much tuning pin in pinblock?I don't claim to have any real expertise to answer this question - more opinion and more questions.

It seems to me that one would always be better off with more pin in more pinblock - how/why would it be any other way? The more length of pin in the block will only make the pin more stable - less likely to enlarge the top of the hole toward the string. The more pin/block contact, the less friction per contact unit would be needed for any given pin torque - meaning more stability and longevity. Just seems to me that more/more could only be win/win.

Paul - what is your reasoning for leaving any empty tuning pin hole on the underside of the pinblock - and then especially, what is your reasoning for relating that distance to coil height? How is one dependant/affecting the other?

Terry Farrell
  ----- Original Message ----- 
  Correct me if I'm wrong, but I've always aimed for a tuning pin/block relationship that, irrespective of the actual measures, ends up with the same dimension between the coil/plate as there is at the bottom of the pinhole in the block. In other words, if the coil height is, for example, 3/16", then there should be approximately 3/16" available between the bottom of the pin and the bottom of the pin hole/bottom of the pin block. The other dimensions then sort themselves out if one chooses the right pin size and block thickness. Does that make sense? It almost always works out to approximately what you calculated: between 1" and 1 1/8" of pin in the hole. 

  Paul

    >How much of pin should ideally be in block?


    As my grandmother used to say to my relatives when divulging ingredients
    for recipes for her fantastic pies: Enough but not too much.


    Generally speaking, The top of the pin usually is anywhere from 7/8" to 1"
    above the plate. Allowing for a 3/8" thickness of plate at tuning pin field,
    with a 2 3/8" pin, that leaves 1" and 1 1/8" into the block respectively.


    Subtract from that the 3/16" bevel at the bottom of the pin, leaving...
    um... er... why can't we use metric?  :-) ...   Enough but not too much...


    A lot depends on the block material and bore diameter/drill speed.

    Jon Page
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