Date: Wed, 5 Oct 2011 09:55:06 -

Author: Mike McFarland

Subject: Re: Van deGraaff Belt Material

Post:

Hi Dick,

Yes, I did that, and did the Mobius twist, but needed to trim the cut afterwards.
I could have used a sharper cutting board.

Mike

Michael McFarland
Instructional Resources Manager
Department of Physics

574-631-7057 (office)
574-344-3827 (cell)

312 Jordan Hall of Science
University of Notre Dame
Notre Dame, IN 46556
________________________________________
From: tap-l-owner@lists.ncsu.edu [tap-l-owner@lists.ncsu.edu] On Behalf Of Dick Heckathorn [geepaw@wowway.com]
Sent: Tuesday, October 04, 2011 7:27 PM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Van deGraaff Belt Material

Greetings

In cutting the diagonal, did you lay one piece of
the belt over the other and cut the diagonal
through both at the same time?

Dick

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu
[mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of
Jerry Hester
Sent: Monday, October 03, 2011 1:50 PM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Van deGraaff Belt Material

Hi Mike,
Some people seem to believe silicone is better,
but you hear others say they make their belts from
rubber, urethane, etc.
I am wondering if there is a significant
difference.
I recently made some belts from urethane but it
was quite thin, less than 1/32".
It was quite difficult to glue straight and have
no gaps.
I cut it on a diagonal according to the
suggestions of others.
It was also quite difficult to cut straight so the
diagonals fit together correctly.
I tried scissors, paper shear, etc. and finally
ended up using the sheet metal shear in our
Instrument Shop.

The Gum Rubber strip you mentioned is listed as
1/16", how was it to glue?
Did you cut on diagonals and then match up ends?

Jerry H.




-----Original Message-----
From: tap-l-owner@lists.ncsu.edu
[mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of
Mike McFarland
Sent: Monday, October 03, 2011 12:50 PM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Van deGraaff Belt Material

Hi Jerry,

About a month ago, I put together a belt for an
old American Electrostatics van de Graaff.
Bought a pair of rubber strips from McMaster-Carr.
Am about 99% sure that the belts
were these:
A quantity of two 6856K11 2-inch-wide 36"-long
Strips of Pure Gum Rubber

Dick Berg's article, which I followed, proved
indispensible. The strips were a little thicker
than what Dick had used. Used a cutting board,
and Super Glue gel.

Mike

Michael McFarland
Instructional Resources Manager
Department of Physics

574-631-7057 (office)
574-344-3827 (cell)

312 Jordan Hall of Science
University of Notre Dame
Notre Dame, IN 46556
________________________________________
From: tap-l-owner@lists.ncsu.edu
[tap-l-owner@lists.ncsu.edu] On Behalf Of Jerry
Hester [jerryh@clemson.edu]
Sent: Monday, October 03, 2011 12:29 PM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Van deGraaff Belt Material

Strangely enough, I had zero replies to the query
below.
That is extremely odd for Tap-l.
Surely some of you have suggestions regarding
belts.

Jerry H.

From: tap-l-owner@lists.ncsu.edu
[mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of
Jerry Hester
Sent: Thursday, September 22, 2011 10:34 AM
To: tap-l@lists.ncsu.edu
Subject: [tap-l] Van deGraaff Belt Material

Taplers,
For those of you who have ventured into making
your own Van deGraaff belts, have you gained any
wisdom you would care to share?
I am looking at ordering more belt material and
have just ordered based on guesses before.
In particular:
Is Silicone rubber material best?
What thickness of material do you find works best?
What Durometer, (hardness) is best.

Aside: Have any of you worked out a good way to
cut belts from the material?

I hope you are all having a great day,

Jerry H.


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