Tuning pin drilling? followup

jimialeggio5 at comcast.net jimialeggio5 at comcast.net
Thu Oct 4 09:23:31 MDT 2007


>Ron wrote:
.>I should qualify this. My 1/4" first pass is with a short 
>flute bit about 10" long, which is plenty flexible. 


Aha!!  You never mentioned this bit (no pun intended) before!!  Now I see why I couldn't duplicate your results. 
No bit I would have considered using would be that ...I guess...compliant would
be the word.  

So... you find your transfer punch dimple by letting your bit do the walking, which being that
long, it's happy to do. Carefully lining up the press and its axix to the dimple becomes not very
important...right?

Your  "go with flow" procedure and material has alot going for it.

Finding the transfer punch mark is the achilles heal, of my rigid set-up...very time consuming.

How picky is the timing of the final plunge with your system?  Mine is very picky, which is good and 
bad...good in that I can accomodate different mic'd pin dimensions by varying the timing of the plunge,
bad in that if I'm not consistent with the timing, results can vary.  Interestingly I can vary the torque
by a good 60inch/lbs by timing alone...requires a metronome.

If I can get over the thought of 10 inches of wobbling steel, I will seriously consider flexing(again no pun intended)
on this proceedure.

Live and learn..maybe...

Jim I


    


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