John--You're right. I thought of that when I suggested a template. You'd
make it to match the bottoms of the tread grooves at full inflation. Then
mount the template in a way that the cutting force between the rubber and
the grinding wheel pushes the grinder directly against the template. Set
this contraption up in a way that allows you to hand feed the grinder
laterally across the tire without it shaking or vibrating. Include a way to
take a sucession of light and ever deeper cuts. May take some creative
thinking. I'd start with a piece of 3/4 plywood and cut it to shape. Slot
it so it can be moved inward after each pass until you clear off the
grooves. One of the keys to effective machining of anything is controlling
tool and workpiece vibrations so you get a consistent cut. Be careful--Lots
of mechanical energy working here. You don't want it disipating in your
bod.
Ed Weldon
----- Original Message -----
From: "John Beckett" <saltracer@servusa.com>
To: "The Weldons" <2weldons@earthlink.net>; <land-speed@autox.team.net>
Cc: <Nt788@aol.com>
Sent: Friday, July 02, 2004 12:59 PM
Subject: Re: Subject: Re: Shaving Tires
> For the salt and especially on a bike I wouldn't think you want any square
> edges. So wouldn't you have to grind on some sort of radius? Makes things
a
> little trickier.
>
> JB
>
> ----- Original Message -----
> From: "The Weldons" <2weldons@earthlink.net>
> To: <land-speed@autox.team.net>
> Cc: <Nt788@aol.com>
> Sent: Friday, July 02, 2004 3:20 PM
> Subject: Subject: Re: Shaving Tires
>
>
> > Jack's right-- You don't machine rubber, you grind it. Test a thick
chunk
> on
> > a coarse sanding disk and go from there. A guy could easily develop his
> own
> > rig. Has to be a rigid setup with the tire running true and no
deflection
> in
> > the grinder mount. Might work spinning the tire on the car; but I'd try
> to
> > gimmick some way of clamping the grinder to the axle housing and
sweeping
> it
> > parallel to the rotating centerline or on a template. Or possibly mount
a
> > front hub off a thick reinforced concrete floor (now's the time to build
> that
> > concrete walkway your wife has always wanted) and build a drive pulley
> mount
> > that attaches to the lug bolt circle. Drill some anchor bolt holes for
the
> > grinder mounted so it can be moved across the tire profile and be reset
> for
> > deeper cuts. (Howcom Jack's ideas come out in so few words while mine
take
> > hundreds?)
> > Ed Weldon
|