[AT] Brake band material

John Wilkens jwilkens at eoni.com
Thu Jul 5 22:03:20 PDT 2007


Thanks, I've got the idea now.  I'm going to try to make the 
pilot.   Don't have a Dremel but I do have a small air-powered 
grinder that I fasten to my tool post.  Kinda looking forward to 
getting set up.  Thanks again John.      John W.


At 06:43 PM 07/05/2007, you wrote:
>  By straight I meant I put absolutely no relief on the cutting edge. It
>would never cut metal but works OK in the brake band material. My intention
>was to keep the tool from grabbing and sucking into the workpiece.  One
>other note, I undercut the pilot with the cutoff wheel--kind of hard to get
>a cutting edge all the way up to the pilot otherwise. If you can use
>countersunk rivets, I'd go that route.  Even if they are an odd angle you
>don't have a countersink for you could sharpen a drill to the correct angle.
>Picking up a drilled hole without a pilot may get to be a pain.
>
>John
>----- Original Message -----
>From: "John Wilkens" <jwilkens at eoni.com>
>To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
>Sent: Thursday, July 05, 2007 7:04 PM
>Subject: Re: [AT] Brake band material
>
>
> > Yeah, I think I can do that.  Hadn't thought of using two plates and
> > a pilot.  One thing I can't visualize  is the "straight cutting
> > edge"  you mention.   Thanks!   John W.
> >
> >
> > At 01:46 PM 07/05/2007, you wrote:
> >>You asked how, so here is what I did. Fair warning, I'm a machinist so
> >>it's
> >>not quite as complicated or time consuming as it might seem.
> >>  I wanted to use the same type of rivets as possible on my tractor so I
> >>needed a counterbore. Some rivets are countersunk, and not all are at the
> >>same angle. Anway I made a counterbore tool out of a drill bit using a
> >>pedestal grinder, lathe and dremel tool. I roughed the end of the tool to
> >>serve as the pilot on the pedestal grinder. Then I put it in the lathe and
> >>clamped my dremel with a cut off wheel in the tool post. I turned the
> >>lathe
> >>and the dremel on and started grinding. Instead of putting any relief
> >>angle
> >>on the tool I left the cutting edge straight--since I would be doing this
> >>in
> >>the drill press I didn't want it to grab. I set up two plates on the drill
> >>press. The bottom one had a hole about the size of the pilot. The top
> >>plate
> >>was made larger to clear the tool. I set a gap between the 2 plates about
> >>.010" thicker than the material so I could slide it thru. I cut the drill
> >>press off between holes so I could use the pilot to line up the lining.
> >>Worked great--hole depth didn't vary .005". If I'd have thought about it
> >>earlier in the week I would have made the tool at work--it would have been
> >>faster but not near as much fun!
> >>
> >>Oh yeah, I clamped the lining to the bands and drilled all the holes first
> >>with a hand drill.
> >>
> >>John
> >>----- Original Message -----
> >>From: "John Wilkens" <jwilkens at eoni.com>
> >>To: "Antique tractor email discussion group"
> >><at at lists.antique-tractor.com>
> >>Sent: Wednesday, July 04, 2007 11:59 AM
> >>Subject: Re: [AT] Brake band material
> >>
> >>
> >> >  Can you tell me the procedure for
> >> > countersinking the lining for the rivets?     John W.
> >> >
> >> >
> >>
> >>
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> >
> >
> >                    In the wide-open spaces of NE Oregon
> >
> >
> >
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