[pianotech] Size of Pinblock Drill bit?

[Noah Frere]

Thumpe said:
"Sure, with the added distance to the coils due to the plate thickness,
that would mean more flagpoling (less of the pin supported by surrounding
structure)."

Ah! that's it


On Wed, Mar 6, 2013 at 8:10 PM, Euphonious Thumpe <lclgcnp at yahoo.com> wrote:

> Sure, with the added distance to the coils due to the plate thickness,
> that would mean more flagpoling (less of the pin supported by surrounding
> structure). Those extremely well-built, open face block 1890's Knabes used
> 1/0 pins, by the way.
>
> Thumpe
>
>  ------------------------------
> * From: * Noah Frere <noahfrere at gmail.com>;
> * To: * <pianotech at ptg.org>;
> * Subject: * Re: [pianotech] Size of Pinblock Drill bit?
> * Sent: * Wed, Mar 6, 2013 9:45:33 PM
>
>   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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