This may not be easy to explain. My belt sander is a 2" wide belt, the lower
wheel is 7 " in diameter and made of hard rubber.You do not use the flat part of
the belt that has the steel backing behind the belt but the lower wheel. Press
the tube against the belt at a 45degree angle below the centerline of the lower
wheel and the rubber will deflect and grind the tubing very fast. I use the edge
of the belt to dress the edges. If you grind both side evenly, it's a 90 degree
intersection. Vary the amount you grind off one side for different angles. I
use
80 grit Norzon belts, about $2.75 to 2.95 each but well worth the price.
I learned this trick when I worked at S&W Racecars in the 70'S. They used the
BurrKing model belt sander, the Caddy model of sanders.
I'm probably as clear as mud...maybe I could fax you a couple of shetches if
that
will help.
joe
LGMCAFEE@aol.com wrote:
> In a message dated 12/8/01 8:46:18 AM Central Standard Time,
> joetimney@dol.net writes:
>
> << As for as notching machines, I sell a nice model from Tubular Dynamics but
> I don't
> use them in my shop. I notch all of my tubing on a 2" wide belt Baldor belt
> sander. It has a rubber wheel on the bottom and I can fish mouth the tube in
> seconds. The machine cost about $700 today but you will use it for
> everything. It
> is absolutely the most used piece of equipment I own. Everybody who has seen
> it in
> use, has marveled at the job it does. Investing is quality equipment is not
> cheap
> but if you intend on building your own cars, it will really pays off in the
> end.
> >>
> Joe I would like to know more about fish mouths on tubing. How do you get the
> right size fish mouth on a wheel that is what about 4 inches in dia. Do you
> grind on the side of the belt? Do you cut the angle on a saw then grind? Also
> most cuts need to line up on both ends how do you get the pipe in the right
> orientation? I have a heavy duty belt sander also and I can't understand how
> to make fish mouths on it. I have always set my tubing in a mill and used a
> fly cutter set to the dia. I want and kick the head to the angle I want and
> it cuts a perfect fish mouth. I know this takes too long for someone that in
> the frame building business but works for me.
> Thanks Larry Mac
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