Bolduc Block - Bit Size - Torque

[Phillip Ford]

>Phillip, Ron..
>
>The test block pieces were drilled with parabolic bits using a 
>vortex cooler, 2/O pins set 1.25" into the block, holes swabbed with 
>varnish.
>
>Mike
>
>
>----- Original Message -----
>From: "Phillip Ford" <fordpiano@earthlink.net>
>To: <pianotech@ptg.org>
>Sent: Wednesday, June 18, 2003 11:52 AM
>Subject: Re: Bolduc Block - Bit Size - Torque
>
>
>>  Ron,
>>
>  > Thanks for posting this.  Good stuff.  Do you have any info about 
>the setup that Mike used for drilling the pinblocks?.........
>>
>  > Phil F
>>
>  > >Ron Nossaman wrote:
>>  >
>>  > > Hi Phil, and all,
>>  > >
>  > > > Here's an updated spreadsheet...
>>

Mike,

Sorry for the slow response.  I wanted to go back to the original 
post of 3 years ago before I responded so I didn't ask needless 
questions.  What about the drill speed?  Did you drill the holes 
using a one pass or two pass (two different sized drills) method?

What happened to the blocks in the interim?  Were they just sitting 
around the shop?  Did the pins ever get turned other than when these 
data points were taken?

Also, I notice that with the varnish on the holes that the torque 
goes up for a smaller bit but down with a larger bit?  Have you found 
this to be the case on multiple samples or just on this one?

I hope that you don't take all of these questions as a criticism. 
It's not intended that way.  I'm trying to understand more about what 
you did and how close your methods are to my own so that I know 
whether I can use the data directly or take it with a grain of salt, 
so to speak.

Regards,

Phil F