[pianotech] Size of Pinblock Drill bit?

[Alan Eder]

Well, if the tuning pin holes in your plate holes have bushings (like on Yamahas), or it is an open window plate (i. e., no cast iron web over the pinblock around the tuning pins, like on many Bosendorfers), 1/0 may work. But if it is, say, Steinway style (covered block, no bushings), then you may find that 1/0 tuning pins flagpole excessively, what with the coil that high off the first point of support for the tuning pin. 


Make sense?



Alan Eder


-----Original Message-----
From: Noah Frere <noahfrere at gmail.com>
To: pianotech <pianotech at ptg.org>
Sent: Wed, Mar 6, 2013 1:21 pm
Subject: Re: [pianotech] Size of Pinblock Drill bit?


Good point both of you on the brad point. Why 1/0?  From what i understand, it has a nicer feel because of the decreased surface area contact with the wood. Plus it leaves more room for coils and string clearance. Plus they're less expensive i think (though that is an after-thought). Plus i like fine things. Thinner is finer :)  Any reason why not?




On Wed, Mar 6, 2013 at 3:56 PM, Ron Nossaman <rnossaman at cox.net> wrote:


On 3/6/2013 1:57 PM, Noah Frere wrote:

I searched my not inconsiderable archives for an answer, but have come
up empty-handed. I am using 1/0 Denro blued tuning pins in a new
multi-lam Maple pinblock, and need to order the drill bit. I'd like to
double-drill - makes sense. The Pianotek catalog recommends, in effect,
a drill bit .016" to .021" under the diameter of a 2/0 pin in a
multi-lam pinblock. Following that logic, I could use the .250" on the
first pass, and the .261" (.015" under) or .257" (.019" under) drill bit
on the second pass. Also, I like the idea of the brad-points, but also
like the idea of the other ones, which are "slow spiral."  Any
recommendations?



You can't use brad points on the second pass anyway, so decide if they will get you anything desirable on the first and buy accordingly. Slow spiral, definitely, particularly on the second pass. The 0.250" should be fine for the first pass. As to final size, as Greg said, test - etc.

Why 1/0?

Ron N



 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20130306/ed052a5b/attachment.htm>