The Whitworth thread shape and pitch standards are used in some of the
current British Model Engineering sizes. Measure the actual diameter of
your screw and determine its diameter in fractions of a n inch and then
measure the thread pitch and convert to threads/inch. Select fasteners
on this page. http://sssmodels.com/ This is not the only place you
can get them but its a start. The thread profile is 55 degrees with a
rounded root and crest. Nothing else fits but a Whitworth.
gabrielma...@telefonica.net wrote:
Those screws are, for sure, from a Bettini reproducer. And, of course, they are
more than 100 years. Perhaps the picture, because of the camera flash, has a
too hight contrast and screws look like new ones, but if you look at them
directly you can count the years they are.
I woulk like to find a withworth 1/8'' nut better than changing the screws. Do
you think is so difficult?
Gabriel
----Mensaje original----
De: rvu...@comcast.net
Fecha: 18/04/2010 21:17
Para: "Antique Phonograph List"<phono-l@oldcrank.org>
Asunto: Re: [Phono-L] Problems with withworth screws
Gabriel,
Those screws don't look 100 years old and I doubt that they are original
to your machine. I think I would replace them with screws and nuts of the
samesise with standard threads. You can probably find some old ones that
would be in character with your machine. Keep the screws you have with your
machine just in case you ever find the correct nut,
----- Original Message -----
From: "Gabriel Marro" <gabrielma...@telefonica.net>
To: "Antique Phonograph List" <phono-l@oldcrank.org>
Sent: Sunday, April 18, 2010 2:32 PM
Subject: [Phono-L] Problems with withworth screws
I am restoring a phonograph and have found a problem with screws and nuts.
This image: http://www.boxio.com/390IKUMODS33/withworth screws&nut.JPG shows
two screws and a copper nut that is to be embedded in the wood. Well, my
problem is that the phonograph lacks the other nut. Here, in Spain, there is
almost impossible to find withworth screws o nuts as they have never been
used here since more than one hundred years.
Do any of you know where can I get a nut to put it embedded in the wood? I
think the metric is 1/8'' Withworth.
Thanks in advance,
Gabriel.
El 18/04/2010, a las 03:19, bruce78...@comcast.net escribió:
Join us tonight and Talk Antique Phonographs, records or any other related
subject on the weekly Antique Phonograph Forum located here. Hoping to see
some new forum participants, and some old ones who have not visited in
awhile.
http://www.oldcrank.org/chat/
Bruce
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