[TCML] rotary gap disk
drieben at comcast.net
Sat Nov 29 08:46:56 MST 2008
You definitely do NOT want to use acrylic (plexiglas).
Plexiglas gets quite brittle from machining and has rela-
tively little impact or thermal resistance. An RSG fabri-
cated from plexiglas would likely fly apart pretty quickly!
Polycarbonate (lexan) is somewhat better due to its high
impact resistance, but still has a relatively low melting point
that could allow it to soften enough from exposure to the
heat developed in the flying electrodes to allow them to
be slung out due to the developed centrifugal force of
high speed rotation.
Garolite (such as G-10 or G-11) is the choice material
for rotary disc due to its high impact resistance as well
as its high temperature & electrical resistance. Garolite
(especially G-11, the highest grade) is considerably more
costly than plexiglas or lexan, but will hold up much better.
Most coilers opt for the G-10, as it's still rather costly,
though less so than G-11, but still has very good thermal
and electrical resistance, as well as impact resistance.
You can purchase sheets of it from McMaster-Carr's
----- Original Message -----
From: <jhowson4 at comcast.net>
To: "tesla list" <tesla at pupman.com>
Sent: Friday, November 28, 2008 9:05 PM
Subject: [TCML] rotary gap disk
> Hey, I am making a sync rotary gap and I was wondering what material
> should be used for the disk? I was thinking acrylic but wasnt sure if it
> was too brittle to machine with my limited skills.
> any ideas?
> Jay Howson
> Tesla mailing list
> Tesla at www.pupman.com
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