[CAUT] Irwin bit

[Donald McKechnie]

What Eric said! In my experience the hole saw with dowel is faster  
and easier than the Forstner. If you have access to a machinist  
lathe, you can bore out a brass Steinway pitman dowel to fit over the  
center bit of the hole saw.

Don McKechnie
Piano Technician
Ithaca College
dmckech at ithaca.edu
607-274-3908




On Oct 17, 2006, at 2:00 PM, caut-request at ptg.org wrote:

> David,
>
>
>
> I use a 1 1/8” hole saw for this operation. Hole saws usually have  
> a ¼” pilot bit which can be drilled into the end of a wooden dowel  
> that is the same diameter as the original pitman hole. This keeps  
> the hole saw from wandering around everywhere until you get it  
> started. I haven’t seen the forstner type bit you are describing  
> but if you could thread it onto a dowel it would work as a guide in  
> much the same manner as the pilot bit in the hole saw.
>
>
>
> Eric
>
>
>
> Eric Wolfley, RPT
> Head Piano Technician
> Cincinnati College-Conservatory of Music
> University of Cincinnati

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