[pianotech] Size of Pinblock Drill bit?

[Noah Frere]

Alan, no I don't understand why that would be, unless the thinner diameter
flagpoles more easily due to less strength, but I don't see why
plate-proximity would effect that. However, it is an open-faced block, or
3/4 plate. (Actually, it's more like 7/8 plate).


On Wed, Mar 6, 2013 at 4:32 PM, Alan Eder <reggaepass at aol.com> wrote:

> 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
>>
>
>
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