[pianotech] Tuning wrench tip threads?

[Jack Reisland]

1/8" tapered pipe thread is based on the plumbing industry standard  
that has no reference to the actual dimension of the pipe. For  
example, an 1/8" pipe is actually 13/32" outside diameter. I have no  
idea why they use these standards. The pipe threads are tapered so  
that they tighten as they are screwed together. I fear I need a metal  
lathe to turn a matched tapered thread.

Best Regards, Jack Reisland



On Sep 2, 2009, at 6:43 PM, Paul McCloud wrote:

> Hi, Joe:
> 	I need to repair the threads on several Schaff type tuning levers.
> The shaft is round, not hexagonal, with a single slot along the  
> length.  I'm
> not a machinist, but 1/8"?? tapered pipe thread.  What does 1/8"  
> refer to?
> I'm quite sure my tips are a bit larger than that.
> 	Pardon my ignorance.  ??
> 	Paul Mccloud	
> 	San Diego
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]  
> On Behalf
> Of Joe Goss
> Sent: Wednesday, September 02, 2009 9:09 PM
> To: pianotech at ptg.org
> Subject: Re: [pianotech] Tuning wrench tip threads?
>
> The standard is 1/8" tapered pipe.
> Mine are 1/8" pipe STRAIGHT
> for less flex at the union of shaft and head.
> There is less of a standard for tips.
> Joe Goss BSMusEd MMusEd RPT
> imatunr at srvinet.com
> www.mothergoosetools.com
> ----- Original Message -----
> From: "Jack Reisland" <reislandj001 at hawaii.rr.com>
> To: <pianotech at ptg.org>
> Sent: Wednesday, September 02, 2009 9:39 PM
> Subject: [pianotech] Tuning wrench tip threads?
>
>
>> Does anyone know what size/ pitch the threads are in a standard  
>> tuning
>> wrench tip? I am playing with making a wrench, and need to match it.
>>
>> Best Regards, Jack Reisland
>>
>>
>>
>
>