[AT] Brake band material

[John Hall]

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.
>
>