----- Original Message -----
From: "The Weldons" <2weldons@earthlink.net>
To: "Crooked Tree Joinery" <crookedtree@triton.net>
Cc: <saltracer@servusa.com>; <Nt788@aol.com>
Sent: Saturday, July 03, 2004 8:02 AM
Subject: Re: Subject: Re: Shaving Tires
> Larry--
> Router might work if dead sharp. Certainly easy to test on a sample on
the
> bench top. Most carbide router bits have one or two cutting points. That
> means you get maybe 50,000 cuts per minute. Put in a 1/2" dia carbide burr
> and you're up to 500,000 cuts per minute. Put in a 24 grit 1" dia
grinding
> wheel and you're around 1.5 million. Run a 7" 24 grit disk in a 6000 rpm
> grinder and you're up to 3 million.
> Now go back and chuck up a piece of rubber in your lathe (be safe--you
don't
> want it flying up in your face), put in your sharpest cutting tool, try
> taking very fine cuts and watch what happens.
> Some 20 years ago while working in the disk drive business I had a local
> shop (Burke Rubber) in San Jose make me some round rubber fixtures to
close
> tolerancces. They did it by grinding them. Turns out that method was
> common practice in the office machinery world for rubber rollers for paper
> handling. There the only way to keep paper moving straight is a dead
> perfect cylindrical roller. Also used for rubber coated rolls in steel
mills
> for the same reason. Freezing rubber in dry ice or liquid N2 is a neat
idea
> but not very practical in a production shop where you're trying to hold
> tolerances.
> Ed Weldon
----- Original Message -----
From: "Crooked Tree Joinery" <crookedtree@triton.net>
To: "The Weldons" <2weldons@earthlink.net>
Sent: Saturday, July 03, 2004 5:19 AM
Subject: Re: Subject: Re: Shaving Tires
I think that I could come up with a jig that could do it but I would use a
router with a strait carbide cutter.
Larry Edgerton
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