Bolduc Block - Bit Size - Torque

[Roger Jolly]

Hi Terry,
                Rate of feed and drill bit temperature has quite an effect, 
The two pass system cuts down on both the tear out and lowers the temp of 
the bit on the second pass.

Regards Roger


At 08:15 AM 6/18/2003 -0400, you wrote:
>Good point Richard. And hence, in part, why my questions. I wonder if it 
>is not my two pass drilling method that is affecting results. I wonder 
>what drilling process was used for the Mike McCoy tests - and as you point 
>out, what kind of drill rig they used.
>
>I am using my overhead drill press which does a wonderful job of holding 
>the drill bit at my specified angle very steady. I also bought a very good 
>after-market chuck for the drill to minimize runout. Perhaps my straight 
>running drill bit and my steady drill press are drilling smaller holes 
>than other setups might drill.
>
>I had looked at the McCoy spreadsheets previously, and thanks Ron N. for 
>posting the update. But this being only my third job drilling a pinblock 
>and first on a Bolduc block, I tend to have these very basic questions - 
>and there is quite a bit of conflicting info. Just trying to get as much 
>info as possible to see what the range of experience and opinions are out 
>there.
>
>Terry Farrell
>
>----- Original Message -----
>From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
>To: "Pianotech" <pianotech@ptg.org>
>Sent: Wednesday, June 18, 2003 5:29 AM
>Subject: Re: Bolduc Block - Bit Size - Torque
>
>
> >
> >
> > BobDavis88@aol.com wroteTerry Farrell writes:
> >
> > >
> > > We have used many Bolduc blocks, and like them. We used several sets
> > > of 1/0 pins, and I decided that I don't like the feel in non-bushed
> > > pianos, so we went back to 2/0. I drill .250 in one pass, and come out
> > > about 120-130 inch pounds right after. I'm surprised Terry's are
> > > coming out that tight.
> > > Bob Davis
> >
> > Hi Bob.
> >
> > Im curious as to whether or not you are drilling by hand or using a
> > mounted press... or what.
> >
> > Cheers
> > RicB
> >
> > --
> > Richard Brekne
> > RPT, N.P.T.F.
> > UiB, Bergen, Norway
> > mailto:rbrekne@broadpark.no
> > http://home.broadpark.no/~rbrekne/ricmain.html
> > http://www.hf.uib.no/grieg/personer/cv_RB.html
> >
> >
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