Fw: just what is 7/32"?

[Mike and Jane Spalding]

Allan, Jim,

For an example of multiple threads, just look at any tuning pin.  It's
easiest to see if the pin is nickel plated with blued threads - gives good
contrast.  It looks like they cut the threads using a tool with 4 or 5
points, so that all the helixes start at the same location.

Mike


----- Original Message -----
From: Allan L. Gilreath, RPT <agilreath@mindspring.com>
To: <pianotech@ptg.org>
Sent: Saturday, April 21, 2001 8:28 AM
Subject: RE: Fw: just what is 7/32"?


> Brother Jim,
>
> I looked it up for you in the "Millwright's and Mechanics Guide."
>
> "Multiple Thread - A screw thread that is formed of two or more single
> threads.  A double thread has two separate or single threads starting
> diametrically opposite or at points 180 degrees apart.  A triple thread
has
> three single threads starting at points 120 degrees apart.  A quadruple
> thread has four single threads starting at points 90 degrees apart.  A
> multiple thread is used to increase the lead of a screw."  (p 355)
>
> Clear as mud, right? <grin>
>
> Allan
> Allan L. Gilreath, RPT
> Assistant Director - TEAM2001
> July 11-15, 2001 - Reno, NV
> agilreath@mindspring.com
> http://www.ptg.org/conv.htm
> Director: Laura Olsen, RPT
> Assistant Directors: Allan Gilreath, RPT - Gary Neie, RPT - Dale Probst,
RPT
>
> -----Original Message-----
> From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf
> Of JIMRPT@AOL.COM
> Sent: Saturday, April 21, 2001 6:46 AM
> To: pianotech@ptg.org
> Subject: Re: Fw: just what is 7/32"?
>
>
>
> In a message dated 4/21/2001 12:28:05 AM, you wrote:
>
> <<Hi Jim
>
>  Describe what is meant by Helix thread ,Please.
>
>    Dale>>
>
> Dale;
>  Double "helix" might not be the correct term that's why I put "?" after
>  each use. :-)
> It is where a double set of threads are cut in a cylinder, or said another
> way where there are duplicate, parallel, sets of threads running on the
same
> cylinder.
> Jim Bryant (FL)
>
>