I was resawing a piece of maple that was 7" wide on my Jet 14" b.s. and all
at once the bottom tire came off the wheel. I suppose there was heat build
up that caused the tire to stretch. I didn't think I was cutting the maple
too fast, but obviously I was.
This was yesterday and I was able to purchase a new tire at the Cutting Edge
for a nominal price. They advised me to put the new tire in a bowl of water
and to nuke it in the microwave. I did and only needed one clamp to hold the
tire while I stretched it onto the wheel. I was back up and resawing in less
than 3 hours.
It might be of interest to anyone that has to deal with this is that the
bolt holding the wheel onto the shaft is a counter clock wise thread.
What was the composition of the tire that fell off? Was it urethane
or neoprene? It sounds like your replacement tire was urethane based
on the heating ritual to install it.
How many "miles/kilometers" were on your original tires?
The saw is 2 years old, but it was new old stock. I think the old tire was
neoprene, but I'm not sure. I think it was early failure, but I like the
saw. I don't expect any more problems, but who knows? I don't know what the
new tire is, I thought it was black neoprene.
its an old trick so that when you load down a machine you actually
apply force to the fastener to tighten it. if it were threaded the
other way it would be gradually trying to loosen itself forever. IT
might never succeed but if it does it wont be a nice scene as the
bandaw konks out and possibly worse.
setting the thread backwards is a total prevention of that
Several years ago I did some work for a retired engineer. He showed me some
brass nuts and bolts that to this day are hard to believe. The nuts and
bolts were made one at a time and had a very special purpose. The bolt was
screwed in and out of a threaded hole to apply more or less pressure. The
bolt had to be adjusted periodically and had to be locked into position so
that it would not move. Naturally it had 2 jam nuts on it to tighten down
and prevent the bolt from turning until the 2 jam nuts were loosened. Not
too hard to imagine so far, right?
The problem with this set up is that there was only room for 1 wrench to
fit. Typically jam nuts need 2 wrenches working in opposite directions to
loosen or tighten. These "special" nuts and bolt worked differently. The 2
nuts loosened and moved away from each other on the bolt when turned in a
counter clockwise direction. When turned clockwise the nuts moved towards
each other. Think about that a while. ;~) The bolt had threads that were
both left hand and right hand. One nut was left hand threaded and the other
right hand threaded. The first nut had to be threaded and in position
before the second nut could be tightened against it because, they had to be
turned in opposite directions to thread them down the bolt. Weird.
To ease the changing of the tire even more, get hold of a motorcycle
tire iron or two. The ones I've seen on the market today are kind of
rough, so expect to spend a half hour or so smoothing the edges, but
then they do the same job as on a motorcycle tire, and speed the
work...make it easier, too, IMO.
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